Liebert® CRV™ Row-based Cooling System
A SmartAisle™ Technology
System Design Manual
600 mm- and 300 mm-wide, Air-cooled, Water/Glycol-cooled and Chilled-water-cooled Units
Table of Content
1.0 Nomenclature and Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Model-number Nomenclature—25-digit Configuration Number1
.......................... 1
1.2 Liebert CRV Component Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.0 Product Configuration and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Air-Cooled, 600 mm (24 in.) —Standard Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Air-Cooled, 600 mm (24 in.)—Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Air-Cooled, 300 mm (12 in.)—Standard Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4 Air-Cooled, 300 mm (12 in.)—Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.5 Water/Glycol, 600 mm (24 in.)—Standard Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.6 Water/Glycol, 600 mm (24 in.)—Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.7 Water/Glycol, 300 mm (12 in.)—Standard Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.8 Water/Glycol, 300 mm (12 in.)—Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.9 Chilled-water, 600 mm (24 in.)—Standard Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.10 Chilled-water, 600 mm (24 in.)—Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.11 Chilled-water, 300 mm (12 in.)—Standard Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.12 Chilled-water, 300 mm (12 in.)—Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.0 System Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.1 Air-cooled Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.1.1 Capacity and Physical Data—Air-cooled Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.1.2 Operating Limits—Air-Cooled Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.1.3 Sound Data—Air-Cooled Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.2 Water/Glycol Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.2.1 Capacity and Physical Data—Water/Glycol Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.2.2 Operating Limits—Water/Glycol Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.2.3 Sound Data—Water/Glycol Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.3 Chilled-water Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.3.1 Capacity and Physical Data—Chilled-water Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.3.2 Operating Limits—Chilled-water systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.3.3 Sound Data—Chilled-water Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
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4.0 Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.1 Air-cooled Systems Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.2 Water/Glycol Systems Electrical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.3 Chilled-water Systems Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.0 Dimensions and Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.1 Planning Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.2 Piping Connections—Air-Cooled Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.3 Piping Connections—Water/Glycol Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.4 Piping Connections—Chilled-water Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.0 Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.0 Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.1 Standard electrical features—600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.2 Optional electrical features—600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.3 Standard electrical features—300 mm (12 in.) DX and CW Models . . . . . . . . . . . . . . . . . 60
7.3.1 Power-supply Requirements
for 460-V, 300 mm (12 in.) Wye vs. Delta Connection Power Supply. . . . . . . . . . . . . . 62
7.4 Optional electrical features—300 mm (12 in.) DX Models . . . . . . . . . . . . . . . . . . . . . . . . 62
7.5 Electrical Disconnect Views—300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
8.0 Heat Rejection—Liebert MC™ and Fin/Tube Condensers . . . . . . . . . . . 73
8.1 Liebert MC Condenser Selections—CRV Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
8.2 Liebert MC Condenser Dimensions and Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
8.3 Liebert MC Condenser Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
8.4 Liebert MC Condenser Electrical Field Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
8.4.1 Key Electrical Details—Typical Connections, Premium Efficiency Control . . . . . . . . . . . . 78
8.4.2 Wye vs. Delta Connection Power Supply—Liebert MCM
and MCL Models with EC Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
8.4.3 Wye vs. Delta Connection Power Supply—Small-platform
Liebert Condenser (MCS028) with Premium EC Control . . . . . . . . . . . . . . . . . . . . . . . . 81
8.5 Liebert MC Condenser Piping Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
8.6 Fin/Tube Condenser Selections—600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
8.6.1 Variable-frequency Drive Fin/Tube Condensers with and without Liebert Lee-Temp™. . . .
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90
8.7 Fin/Tube Condensers Dimensions and Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
8.8 Fin/Tube Condenser Electrical Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
8.9 Fin/Tube Condenser Standard Features—Air-cooled, R-410A with Lee-Temp™ Control 95
8.10 Fin/Tube Condenser Features—R-410A with VFD Control . . . . . . . . . . . . . . . . . . . . . . 96
8.10.1 Fin/Tube Condenser Standard features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
8.10.2 Fin/Tube Condenser Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
8.11 Fin/Tube Condensers—Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
9.0 Heat Rejection—Liebert Drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
9.1 Drycoolers for Water/Glycol-cooled Liebert CRVs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
9.2 Drycooler Dimensional Data and Weights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
9.3 Drycooler General Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
9.4 Drycooler Pump Packages and Expansion Tank—Options . . . . . . . . . . . . . . . . . . . . . . 106
9.4.1 Drycooler Expansion Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
9.5 Glycol-cooled Direct Drive Drycooler—Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
9.5.1 Drycooler Standard Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
9.5.2 Drycooler Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Appendix A: CRV Seismic Application,
600 mm (24 in.) Models—Optional Unit Configuration Required. . . 111
A.1 Seismic Certification Criteria. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
A.2 Requirements for Anchorage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Appendix B: CRV Non-seismic Application,
600 mm (24 in.) Models—Optional Unit Configuration Required. . . 119
Appendix C: CRV Seismic Application,
300 mm (12 in.) Models—Optional Unit Configuration Required. . . 125
C.1 Seismic Certification Criteria. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
C.2 Requirements for Anchorage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Appendix D: CRV Non-seismic Application,
300 mm (12 in.) Models—Optional Unit Configuration Required. . . 133
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Appendix E: Liebert CRV Intended Application . . . . . . . . . . . . . . . . . . . . . 139
E.1 Unit-to-Unit (U2U)—Coordinated Cooling Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
E.2 SmartAisle™ Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
E.3 Placing Liebert CRV Units in Rows of Racks for Efficiency . . . . . . . . . . . . . . . . . . . . . . 141
E.4 Placement in the Room. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
E.5 Redundancy Arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
E.6 Liebert CRV Applied in SmartAisle™ Cold Aisle Containment . . . . . . . . . . . . . . . . . . . . 145
E.7 Liebert CRV and Liebert XD™ Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Appendix F: Extra Airflow—Standard on 600 Series,
Configurable on 300 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Appendix G: Model Number Nomenclature Detail . . . . . . . . . . . . . . . . . . . 149
Appendix H: Guide Specifications—Row-Based
Environmental Control System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
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List of Figures
Figure 1-1 Component location, common components—All models, 600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . 2
Figure 1-2 Component location—Air-cooled, 300 mm (12 in.) CR019. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 1-3 Component location—Water/Glycol-cooled, 300 mm (12 in.) CR019 . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 1-4 Component location—Chilled-water, 300 mm (12 in.) CR032 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2-1 Liebert CRV, front and rear views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5-1 Cabinet and floor-planning dimensions—600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 5-2 Cabinet and floor-planning dimensions—300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 5-3 Piping connections—Air-cooled, 600 mm (24 in.), digital scroll with EC fans. . . . . . . . . . . . . . . . . . . . 45
Figure 5-4 Piping connections—Air-cooled, 300 mm (12 in.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 5-5 Piping connections—Water/Glycol, 600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 5-6 Piping connections—Water/Glycol, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 5-7 Piping and Electrical connections—Chilled-water, 600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 5-8 Piping connections—Chilled-water, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Figure 6-1 General arrangement with condenser—Air-cooled, 600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 6-2 General arrangement with —Air-cooled, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Figure 6-3 General arrangement—Water/Glycol-cooled, 600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Figure 6-4 General arrangement—Water/Glycol-cooled, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Figure 6-5 General arrangement—Chilled-water CR040, 600 mm (24) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Figure 6-6 General arrangement—Chilled-water CR030 and CR034, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . 56
Figure 7-1 Electrical field-connections—600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Figure 7-2 Wye vs. delta power supply connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Figure 7-3 Electrical disconnect views—300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Figure 7-4 Electrical field-connections—Air-cooled and Water/Glycol-cooled, 300 mm (12 in.) . . . . . . . . . . . . . . 64
Figure 7-5 Electrical field connections 120 V—Chilled-water, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Figure 7-6 Low-voltage field wiring routing
into the unit—Air-cooled and Water/Glycol-cooled, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . 66
Figure 7-7 Power cable routing—Bottom-entry, Air-cooled and Water/Glycol-cooled, 300 mm (12 in.). . . . . . . . . 67
Figure 7-8 Power cable routing—Bottom-entry, Chilled-water, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Figure 7-9 Liebert IntelliSlot™ cable routing—Top-entry, All models, 300 mm (12 in.). . . . . . . . . . . . . . . . . . . . . . 69
Figure 7-10 Liebert IntelliSlot™ cable routing—Bottom-entry,
Air-cooled and Water/Glycol-cooled, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Figure 7-11 Liebert IntelliSlot™ cable routing—Bottom-entry, Chilled-water, 300 mm (12 in.) . . . . . . . . . . . . . . . . 71
Figure 8-1 MC Condenser planning dimensional data—MCS028, MCM040 and MCL055 . . . . . . . . . . . . . . . . . . 75
Figure 8-2 MC Condenser planning dimensional data—MCM080 and MCL110 . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Figure 8-3 MC Condenser typical connections, Premium Efficiency Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Figure 8-4 Wye and delta power supply connection diagram ......................................... 81
Figure 8-5 Wye and delta power supply connection diagram ......................................... 82
Figure 8-6 CANbus communication connection
Liebert CRV 600 mm (24 in.) and Liebert MC (premium) condenser. . . . . . . . . . . . . . . . . . . . . . 83
Figure 8-7 CANbus communication connection
Liebert CRV 300 mm (12 in.) and Liebert MC (premium) condenser. . . . . . . . . . . . . . . . . . . . . . 84
Figure 8-8 Liebert MC piping—Single-circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
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Figure 8-9 Liebert MC piping—Single-circuit with Liebert Lee-Temp™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Figure 8-10 Cabinet and anchor dimensions—Fin/Tube condenser with Lee-Temp™ . . . . . . . . . . . . . . . . . . . . . 91
Figure 8-11 Cabinet and anchor dimensions—Fin/tube condenser with VFD-control . . . . . . . . . . . . . . . . . . . . . . 92
Figure 8-12 Fin/tube condenser electrical field connections—R-410A, VFD-control . . . . . . . . . . . . . . . . . . . . . . . 94
Figure 8-13 Fin/Tube condenser piping—R-410A, single-circuit with Liebert Lee-Temp™ . . . . . . . . . . . . . . . . . . 95
Figure 8-14 General arrangement with condenser—Air-cooled, 600 mm (24 in.), Fin/
Tube condenser with and without Liebert Lee-Temp™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Figure 8-15 Fin/Tube condenser piping—R-410A, Single-circuit, VFD-control . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Figure 9-1 Percentage of ethylene glycol mixed with water. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Figure 9-2 Cabinet and anchor dimensions for direct drive Drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Figure 9-3 Electrical field connections for fluid-temperature-control direct-drive drycoolers . . . . . . . . . . . . . . . . 105
Figure 9-4 Drycooler pump package and pump mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Figure 9-5 Drycooler pump curve, 60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Figure 9-6 Drycooler Expansion tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Figure A-1 CRV 600 mm (24 in.)—Seismic rigid floor stand anchoring dimensions . . . . . . . . . . . . . . . . . . . . . . 112
Figure A-2 CRV 600 mm (24 in.)—Seismic rigid floor stand—overall dimensions. . . . . . . . . . . . . . . . . . . . . . . . 113
Figure A-3 CRV 600 mm (24 in.)—Seismic rigid floor stand connection details . . . . . . . . . . . . . . . . . . . . . . . . . 114
Figure A-4 CRV 600 mm (24 in.)—Seismic rigid floor-mount bracket anchoring dimensions . . . . . . . . . . . . . . . 115
Figure A-5 CRV 600 mm (24 in.)—Seismic rigid floor-mount bracket connection details . . . . . . . . . . . . . . . . . . 116
Figure A-6 CRV 600 mm (24 in.) seismic electrical wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Figure A-7 CRV 600 mm (24 in.) seismic piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Figure B-1 CRV 600 mm (24 in.)—rigid floor-mount bracket anchoring dimensions . . . . . . . . . . . . . . . . . . . . . . 119
Figure B-2 CRV 600 mm (24 in.)—rigid floor-mount bracket connection details . . . . . . . . . . . . . . . . . . . . . . . . . 120
Figure B-3 CRV 600 mm (24 in.)—rigid floor stand anchoring dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Figure B-4 CRV 600 mm (24 in.)—rigid floor stand—overall dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Figure B-5 CRV 600 mm (24 in.)—rigid floor stand connection details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Figure C-1 CRV 300 mm (12 in.)—Seismic rigid floor stand anchoring dimensions . . . . . . . . . . . . . . . . . . . . . . 126
Figure C-2 CRV 300 mm (12 in.)—Seismic rigid floor stand—overall dimensions . . . . . . . . . . . . . . . . . . . . . . . 127
Figure C-3 CRV 300 mm (12 in.)—Seismic rigid floor stand connection details . . . . . . . . . . . . . . . . . . . . . . . . . 128
Figure C-4 CRV 300 mm (12 in.)—Seismic rigid floor-mount bracket anchoring dimensions . . . . . . . . . . . . . . . 129
Figure C-5 CRV 300 mm (12 in.)—Seismic rigid floor-mount bracket connection details . . . . . . . . . . . . . . . . . . 130
Figure C-6 CRV 300 mm (12 in.) seismic electrical wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Figure C-7 CRV 300 mm (12 in.) seismic piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Figure D-1 CRV 300 mm (12 in.)—rigid floor-mount bracket anchoring dimensions . . . . . . . . . . . . . . . . . . . . . . 133
Figure D-2 CRV 300 mm (12 in.)—rigid floor-mount bracket connection details . . . . . . . . . . . . . . . . . . . . . . . . . 134
Figure D-3 CRV 300 mm (12 in.)—rigid floor stand anchoring dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Figure D-4 CRV 300 mm (12 in.)—rigid floor stand—overall dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Figure D-5 CRV 300 mm (12 in.)—rigid floor stand connection details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Figure E-1 Example of high-density installation with alternating cold and hot aisles . . . . . . . . . . . . . . . . . . . . . . 139
Figure E-2 SmartAisle™ installation example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Figure E-3 One Liebert CRV, recommended placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Figure E-4 One Liebert CRV, alternate placement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Figure E-5 Simulated aisle containment using room barriers—single row. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Liebert® CRV™ System Design Manual
vi
Figure E-6 Simulated aisle containment using room barriers—multiple rows . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Figure E-7 Number of racks, row length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Figure E-8 Depth of hot / cold aisles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Figure E-9 Example of an application with one row and N+1 redundancy—left side unit failed . . . . . . . . . . . . . 144
Figure E-10 Example of an application with two rows and N+1 redundancy—unit at lower left failed. . . . . . . . . 144
Figure E-11 Liebert CRV placement
with SmartAisle cold aisle containment—Liebert CRV’s in center of two rows . . . . . . . . . . . . . 145
Figure E-12 Liebert CRV placement
with SmartAisle™ cold aisle containment—Liebert CRV at end of one row . . . . . . . . . . . . . . . . 145
Figure E-13 Liebert CRV placement with Liebert XDV’s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Figure F-1 Nominal Airflow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Figure F-2 Nominal Energy Consumption of Both Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
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Liebert® CRV™ System Design Manual
viii
List of Tables
Table 2-1: Unit configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3-1: Performance data—Air-cooled, 600 mm (24 in.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 3-2: Performance data—Air-cooled, 300 mm (12 in.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 3-3: Physical data—Air-cooled, 600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 3-4: Physical data—Air-cooled, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 3-5: Operating limits—Air-cooled Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 3-6: Sound data—Air-cooled CR020RA, 600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 3-7: Sound data—Air-cooled, CR035RA, 600 mm (24 in.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 3-8: Sound data—Air-cooled and Water/Glycol-cooled CR019RAS, 300 mm (12 in.) . . . . . . . . . . . . . . . . . 25
Table 3-9: Performance data—Water-cooled CR020RW, 600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 3-10: Performance data—Water-cooled CR035RW, 600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 3-11: Performance data—Glycol-cooled CR035RW and CR020RW, 600 mm (24 in.) . . . . . . . . . . . . . . . . 28
Table 3-12: Performance data—Water-cooled CR019RW, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 3-13: Performance data—Glycol-cooled, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 3-14: Physical data—Water/Glycol-cooled, 600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 3-15: Physical data—Water/Glycol-cooled, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 3-16: Operating limits—Water/Glycol Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 3-17: Sound data—Water/Glycol CR020RW and CR035RW, 600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . 32
Table 3-18: Sound data—Water/Glycol CR019RA, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 3-19: Performance Data—Chilled-water CR040RC, 600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 3-20: Performance Data—Chilled-water CR032RC1, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 3-21: Physical data—Chilled-water, 600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 3-22: Physical data—Chilled-water, 300mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 3-23: Operating limits—Chilled-water systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 3-24: Sound data—Chilled-water CR040RW, 600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 3-25: Sound data—Chilled-water CR032RC, 300 mm (12 in.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 4-1: Electrical data—Air-cooled, 600 mm (24 in.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 4-2: Electrical data—Air-cooled CR019, 300 mm (12 in.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 4-3: Electrical data—Water/Glycol, 600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 4-4: Electrical data—Air-cooled & Water/Glycol CR019, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 4-5: Electrical data—Chilled-water, 600 mm (24 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 4-6: Electrical data—Chilled water, 300 mm (12 in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 8-1: Traditional open room 95°F (35°C)/23RH return air conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 8-2: Traditional open room 95°F (35°C)/23RH return air conditions, Liebert QuietLine operation . . . . . . . . 73
Table 8-3: Liebert MC Condenser approximate net and shipping weights, dimensions, and volume . . . . . . . . . . 73
Table 8-4: Liebert MC Condenser dry weight with additional option(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Table 8-5: MC Condenser electrical data, 3-phase, 60-Hz condenser, Premium Version (EC control) . . . . . . . . . 77
Table 8-6: MC Condenser electrical data—Liebert Lee-Temp receiver, 60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Table 8-7: MC single-circuit piping sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Table 8-8: Liebert MC piping connection sizes—Single-circuit condensers with Liebert Lee-Temp . . . . . . . . . . . 89
Table 8-9: Recommended refrigerant-line sizes
for Liebert MC condensers with R-410A, with and without Liebert Lee-Temp™, Cu, OD . . . . . . . . . . 90
Table 8-10: Traditional open room return air conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
ix
Liebert® CRV™ System Design Manual
Table 8-11: Electrical data—60-Hz fin/tube condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Table 8-12: Recommended refrigerant-line sizes
for Liebert MC condensers with R-410A, with and without Liebert Lee-Temp™, Cu, OD . . . . . . . . . . 99
Table 9-1: Glycol-cooled drycooler matchups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Table 9-2: Drycooler piping, O.D., Cu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Table 9-3: Drycooler electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Table 9-4: Drycooler pump data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Table A-1: CRV 600 mm (24 in.) Shake-table test parameters, first level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Table A-2: CRV 600 mm (24 in.) Shake-table test parameters, second level . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Table C-1: CRV 300 mm (12 in.) Shake-table test parameters, first level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Table C-2: CRV 300 mm (12 in.) Shake-table test parameters, second level . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Table F-1: Nominal Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
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x
Nomenclature and Components
1.0 Nomenclature and Components
1.1 Model-number Nomenclature—
25-digit Configuration Number1
For the full description of model number refer to the Model-number Nomenclature Detail Appendix.
Model # Part 1
Model Details
1
2
3
4
5
6
7
8
9
10
11
12
13
C
R
0
2
0
R
A
1
C
7
S
H
1
Model # Part 2
14
15
16
17
18
19
20
21
22
23
24
25
8
1
1
E
L
1
0
P
A
—
—
—
Digits 1-2 - Unit Family
Digits 3-5 - Nominal Capacity, kW
Digit 6 - Row-Based, Unit Depth
Digit 7 - System Type
Digit 8 - Fan Type
Digit 14 - Air Filter
Digit 15 - Water/Glycol Valve Type
Digit 16 - Enclosure
Digit 17 - High-Voltage Options
Digit 18 - Option Package
Digit 9 - Power Supply
Digit 19 - Liebert IIntelliSlot™ Housing
Digit 20 - Future Options
Digit 21 - Packaging With Ramp
Digit 22 - Special Features
Digits 23-25 - Factory Configuration Number
Digit 10 - Cooling System
Digit 11 - Humidifier
Digit 12 - Control System
Digit 13 - Reheat
1. The 14-digit model number consists of the first 10 digits and last four digits of the configuration number.
1
Liebert® CRV™ System Design Manual
Nomenclature and Components
1.2 Liebert CRV Component Location
Figure 1-1 Component location, common components—All models, 600 mm (24 in.)
3
4
1
13
5
2
12
6
11
7
10
9
8
Item
1
2
3
4
5
6
7
Description
Top electrical entrance
Electric box
Top humidifier water supply,
condensate-pump drain
Supply and Return connections
EC plug fans
Electric heaters
Humidifier distributor
Liebert® CRV™ System Design Manual
Item
8
9
Description
Condensate pump
Bottom electrical entrance
10
Bottom condensate-pump drain
11
12
13
Evaporator / CW coil
Liebert iCOM display
Serial tag (inside door)
2
Nomenclature and Components
Figure 1-2 Component location—Air-cooled, 300 mm (12 in.) CR019
1
Front
10
9
Rear
13
8
12
7
2
3
4
5
10
6
Rear
11
DPN003583
Rev. 0
Front
1
Liebert iCOM Display
8
Serial Tag
2
Evaporator Coil
9
Main Disconnect Switch
3
Refrigerant piping connections and Condensate
Pump Drain (Bottom)
10
Top Electrical Entrance
4
Electrical Connection (Bottom)
11
Baffles (5 assemblies)
5
Compressor
12
EC Plug Fans (5)
6
Caster and Leveling Foot (Each Corner)
13
Top Refrigerant Connections
7
Electric Box
3
Liebert® CRV™ System Design Manual
Nomenclature and Components
Figure 1-3 Component location—Water/Glycol-cooled, 300 mm (12 in.) CR019
18
3
FRONT
4
19
REAR
Supply/Return Top Piping Option
Supply/Return Bottom Piping Option
FRONT
REAR
11
1
14
10
13
2
12
9
8
7
6
16
REAR
15
FRONT
5
17
Common to Top and Bottom Options
1
Liebert iCOM Display
11
Top Electrical Entrance
2
Evaporator Coil
12
Baffles (5 assemblies)
3
Supply/Return Connections (Bottom-piping
option)
13
EC Plug Fans (5)
4
Knockouts for Supply/Return (Bottom-piping
option)
14
Condensate-pump Drain Top Connection
5
Bottom Electrical Entrance
15
Control Valve
6
Compressor
16
Heat Exchanger (Plate)
7
Caster and Leveling Foot (Each corner)
17
Condensate Pump
8
Electric Box
18
Supply/Return Connections (Top-piping option)
9
Serial Tag
19
Condensate-pump Drain Bottom Connection
10
Main Disconnect Switch
Liebert® CRV™ System Design Manual
4
Nomenclature and Components
Figure 1-4 Component location—Chilled-water, 300 mm (12 in.) CR032
FRONT
11
1
10
REAR
14
9
13
8
2
3
4
7
5
6
REAR
12
FRONT
1
2
3
4
5
6
7
Liebert iCOM Display
Cooling Coil
Knockouts for Bottom Electrical Entrance
Supply and Return Piping Connections (Bottom)
Bottom Chilled-water and Condensate-pump drain connections
Caster and Leveling Foot (Each corner)
Chilled-water Valve (2- or 3-way Valve)
5
8
9
10
11
12
13
14
DPN003584
Rev. 0
Electric Box
Serial Tag
Main Disconnect Switch
Electrical Connection (Top)
Baffles (5 assemblies)
EC Plug Fans (6)
Top Chilled-water and Condensate-pump Drain Connections
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Nomenclature and Components
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Liebert® CRV™ System Design Manual
6
Product Configuration and Features
2.0 Product Configuration and Features
The Liebert CRV 300 series and 600 series Thermal Management units are meant for location within a row
of heat-generating IT-equipment racks and provide the all of the functions of a standard Thermal
Management unit, including cooling, heating, humidification, dehumidification, air filtration, condensate
management, temperature control, alarm monitoring and data communication. (The 300 mm [12 in.]
models do not provide heating, humidification or dehumidification.)
The Liebert CRV, designed for hot-aisle-cold-aisle configurations optimizes maximum cooling capacity in a
minimal footprint. The extremely energy-efficient components of the CRV are managed by the
Liebert iCOM® control system. The iCOM control monitors the environment in real-time with rack-inlet
sensors on the cooled by the in-row CRV. The information gathered allows optimization of performance
and energy efficiency.
All operations and sensor data can be reported remotely via a variety of communication protocols,
providing a built-in, rack-temperature monitoring system.
The supply-air baffle directs the air leaving the CRV to the racks, maximizing its effectiveness, reducing the
chance for hot spots, and improving overall system efficiency. The angle and spacing of the baffle-vanes
series are optimized through CFD modeling, laboratory testing and real-world installations.
All service and maintenance is performed through the front and rear of the unit, including all component
replacement. All piping and electrical connections are made through the top or bottom of the unit.
Table 2-1
Series
Width
Unit configurations
Cooling Type
Nominal Cooling
Capacity, kW
Air
600
300
24 in.
(600 mm)
12 in.
(300 mm)
Input Power
60 Hz
20
Water / Glycol
Air
35
Water / Glycol
208 V/3 ph
460 V/3 ph
Chilled Water
40
Air
19
208-230 V/3 ph
460 V/3 ph-Wye
Chilled Water
32
208-230 V/1 ph
208-230 V/3 ph
460 V/3 ph-Wye
120 V/1 ph
Water / Glycol
19
208-230 V/3 ph
460 V/3 ph-Wye
7
Liebert® CRV™ System Design Manual
Product Configuration and Features
Figure 2-1 Liebert CRV, front and rear views
2.1 Air-Cooled, 600 mm (24 in.) —Standard Features
Source: DPN001904, Rev. 4
DX Cooling coil—The evaporator coil has 7.25 ft2 (0.674 m2) face area, 4 or 5 rows deep. It is constructed of
copper tubes and hydrophilic coated aluminum fins. The hydrophilic coating provides superior water
carryover resistance. Two stainless steel condensate drain pans are provided.
Refrigeration System—Single refrigeration circuit includes a liquid line filter drier, a refrigerant sight glass
with moisture indicator, an adjustable externally equalized expansion valve, and a liquid line solenoid valve.
Compressor—The compressor is an R-410A scroll-type with variable capacity operation from 20-100%;
commonly known as a Digital Scroll. Compressor solenoid valve unloads the compressor to provide
variable capacity operation. The compressor has a suction gas cooled motor, vibration isolators, internal
thermal overloads, manual reset high pressure switch, RotoLock service valves, low pressure and high
pressure transducer, crankcase heater, internal centrifugal oil pump, and an operating speed of 3500 RPM @
60 Hz (2900RPM @ 50 Hz).
Fan—The unit is equipped with two plug fans: direct driven centrifugal fans with backward curved blades and
Electronically Commutated DC motors; commonly referred to as EC plug fans. The fan speed is variable and
automatically regulated by the iCOM control through all modes of operation. Each fan has a dedicated motor
and speed controller which provides a level of redundancy. The fans push air through the coil and are located
on the rear panel of the unit.
Supply Air Baffle—A field adjustable, modular supply air baffle is located in the discharge air stream. It
can be quickly and easily reconfigured to redirect airflow. The angles of the vanes have been optimized to
effectively distribute air to heat generating equipment in a wide variety of applications.
iCOM Control System—The Liebert CRV is controlled by the iCOM Control System. The standard user
interface is a 9-inch, color touch screen that presents system information and allows all parameters to be
viewed and adjusted. It features a 3-level password protection system. Unit-to-unit communication with
other Liebert CRVs and two IntelliSlot communication-card housings are included as standard.
2T Rack Temperature Sensors—Consist of a vented case with two temperature probes. Three
(3) 2T rack sensors are standard with each Liebert CRV. Up to ten (10) 2T housings (20 temperature
probes) can be connected to a Liebert CRV.
Liebert® CRV™ System Design Manual
8
Product Configuration and Features
One (1) 2T housing and both sensor probes are to be attached to a rack the cooling unit is conditioning.
The sensors provide real-time direct feedback to the cooling unit to optimize the amount of cooling and
airflow required; increasing energy efficiency and ensuring proper rack inlet air temperatures. The sensor
data can also be reported to remote BMS and monitoring systems. The sensor network consists of one
CAN wire leaving the cooling unit and connecting to a 2T sensor. Each remaining 2T sensor is connected
to the previous sensor; often referred to as a daisy-chain configuration.
Remote Shutdown Terminal—Provides the customer with a location to remotely shut down the unit.
Common Alarm Contact—Provides the customer with a set of normally open (n/o) contacts for remote
indication of unit alarms.
Cabinet—The exterior steel panels are custom powder coated to protect against corrosion. The double
wall constructed side panels separate the ½ inch, 2.0 lb/ft3 insulation from the air stream. The unit is
mounted on casters for quick installation and provided with leveling feet. The perforated inlet and outlet
panels have 81% open area, and the rear door utilizes a Knürr rack style handle and hinges.
Service Access—All service and maintenance is performed through the front and rear of the unit;
including any component removal. No side access is required. All electrical and piping connections are
made through the top and/or bottom of the unit. All units are provided with a Superior Service Access
Panel to provide additional access.
Filter—The unit is equipped with two deep pleated 4 inch filters rated MERV8 (based on
ASHRAE 52.2-2007), located within the cabinet, and accessible from the rear of the unit. A filter clog alarm
is included.
Locking Disconnect Switch—A molded case circuit interrupter disrupts the flow of power to the unit. The
electric panel high voltage compartment can only be accessed with the switch in the ‘off’ position.
Conveniently located behind the iCOM display door for quick access.
65,000 Amp Short-circuit Current Rating (SCCR)—The electrical panel provides a 65k amp SCCR.
2.2 Air-Cooled, 600 mm (24 in.)—Optional Features
Source: DPN001907, Rev. 4
Dual-float Condensate Pump—has a capacity of 6 GPM (22.7 l/min) at 30ft (9 m) head. Pump is
complete with integral primary and secondary float switches, pump, motor assembly and reservoir. The
secondary float shall send a signal to the local alarm and shut down the unit upon high water condition.
Humidifier—A steam generating canister humidifier is factory-installed in the cooling unit and is operated
by the iCOM control system.
It is complete with disposable cylinder, all supply and drain valves, steam distributor and electronic
controls. The need to change the canister is indicated on the iCOM display. The humidifier is designed to
operate with water conductivity from 125-500 (50 Hz) or
330-670 (60 Hz) microS/cm. System automatically fills and drains as well as maintains the required water
level based on conductivity. An air-gap within the humidifier assembly shall prevent back flow of the
humidifier supply water. The humidifier is removable from the rear of the cabinet.
Electric Reheat—The electric reheat coils are low watt density, 304 stainless steel fin-tubular
construction, protected by thermal safety switches and controlled in one stage.
Low-noise package—reduces the level of sound emitted from the compressor. The package consists of a
3/8 inch closed cell polymeric 4.5 – 8.5 lbs/ft3 density compressor sound jacket that encloses the
compressor. Additional ½ inch closed cell polymeric 3 - 8 lbs/ft3 density sound deadening material is
affixed to the underside of the Superior Service Access Panel located above the compressor and attached
to the inner side of the compressor compartment panels that face the hot and cold aisles. All sound
deadening material is non-shedding and located outside of the air stream.
IntelliSlot™ Web Card (IS-WEBL)—Provides ground fault isolated 10/100 baseT Ethernet connectivity for
unit monitoring and management. The supported management interfaces include: SNMP for Network
Management Systems, HTTP for web page viewing, SMTP for email and SMS for Mobile messaging.
9
Liebert® CRV™ System Design Manual
Product Configuration and Features
IntelliSlot 485 Card (IS-485L)—Provides ground fault isolated RS-485 Modbus network connectivity to
Building Management Systems for unit monitoring and management.
IntelliSlot Building-management Card (IS-IPBML)—Provides ground fault isolated Modbus IP network
connectivity to Building Management Systems for unit monitoring and management.
IntelliSlot Sitelink-E® Card (IS-485EXI)—Provides ground fault isolated connection to a Liebert SiteLinkE for monitoring and management. Compatible with Liebert SiteScan Web 4.0 or newer version.
Filter—The optional filters are two deep pleated 4 inch rated MERV11 following ASHRAE 52.2 (60-65% by
ASHRAE 52.1), located within the cabinet and accessible from the rear of the unit. A filter clog alarm is
included.
Reheat/Humidifier Lockout—Includes the necessary relays to disable the reheat and humidifier from an
external 24 volt signal.
One (1) Extra Common Alarm Contact—Provides the customer with a total of two sets of normally open
(n/o) contacts for remote indication of unit alarms.
Liqui-tect® Sensor—Is a solid state water sensor that has no moving parts and is hermetically sealed to
keep out dust and dirt. When the sensor detects the presence of moisture the alarm system is activated.
2.3 Air-Cooled, 300 mm (12 in.)—Standard Features
Source: DPN002811, Rev. 7
DX Cooling Coil—The evaporator coil has 6.46 ft2 (0.60 m2) face area, 3 rows deep. It is constructed of
copper tubes and hydrophilic coated aluminum fins. The hydrophilic coating provides superior water
carryover resistance. A stainless steel condensate drain pan is provided.
Refrigeration System—Single refrigeration circuit includes a liquid line filter drier, a refrigerant sight glass
with moisture indicator, an adjustable externally equalized expansion valve, and a liquid line solenoid
valve.
Compressor—The compressor is an R-410A scroll-type with variable capacity operation from 20-100%;
commonly known as a Digital Scroll. Compressor solenoid valve unloads the compressor to provide
variable capacity operation. The compressor has a suction gas cooled motor, vibration isolators, internal
thermal overloads, manual reset high pressure switch, Rotolock service valves, low pressure and high
pressure transducer, crankcase heater, internal centrifugal oil pump, sound jacket, and an operating speed
of 3500 RPM @ 60 Hz.
Fans—The unit is equipped with five plug fans: direct driven centrifugal fans with backward curved blades
and Electronically Commutated motors; commonly referred to as EC plug fans. The fan speed is variable
and automatically regulated by the iCOM control through all modes of operation. Each fan has a dedicated
motor and integrated speed controller which provides a level of redundancy. The fans pull air through the
coil and are located in the front of the unit.
Supply Air Baffle—Field adjustable, modular supply air baffles are located in the discharge air stream.
They can be quickly and easily reconfigured to redirect airflow.
iCOM Control System—The Liebert CRV is controlled by the iCOM Control System. The standard user
interface is a 9-inch, color touch screen that presents system information and allows all parameters to be
viewed and adjusted. It features a 3-level password protection system. Unit-to-unit communication with
other Liebert CRVs and two IntelliSlot communication-card housings are included as standard.
2T Rack Temperature Sensors—Consist of a vented case with two temperature probes. Three (3) 2T
rack sensors are standard with each Liebert CRV. Up to ten (10) 2T housings (20 temperature probes) can
be connected to a Liebert CRV300. One (1) 2T housing and both sensor probes are to be attached to a
rack the cooling unit is conditioning. The sensors provide real-time, direct feedback to the cooling unit to
optimize the amount of cooling and airflow required; increasing energy efficiency and ensuring proper rack
inlet air temperatures. The sensor data can also be reported to remote BMS and monitoring systems. The
sensor network consists of one CAN wire leaving the cooling unit and connecting to a 2T sensor. Each
remaining 2T sensor is connected to the previous sensor; often referred to as a daisy-chain configuration.
Liebert® CRV™ System Design Manual
10
Product Configuration and Features
Remote Shutdown Terminal—Provides the customer with a location to remotely shut down the unit.
Common Alarm Contact—Provides the customer with a set of normally open (n/o) contacts for remote
indication of unit alarms.
Cabinet—The exterior steel panels are custom powder coated to protect against corrosion. The unit is
mounted on casters for quick installation and provided with leveling feet. The perforated inlet and outlet
panels have 81% open area, the front door is hinged and the rear door is liftoff.
Service Access—All service and maintenance is performed through the front and rear of the unit;
including any component removal. No side access is required. All electrical and piping connections are
made through the top and/or bottom of the unit.
Filter—The unit is equipped with two 1/2 inch filters rated MERV1 (based on ASHRAE 52.2-2007), located
within the cabinet, and accessible from the rear of the unit. A filter clog alarm is included.
Locking Disconnect Switch—A molded case circuit interrupter disrupts the flow of power to the unit. The
electric panel high voltage compartment can only be accessed with the switch in the ‘off’ position located
behind the rear door and filters for access.
65,000 Amp Short-circuit Current Rating (SCCR)—The electrical panel provides a 65k amp SCCR.
2.4 Air-Cooled, 300 mm (12 in.)—Optional Features
Source: DPN002812, Rev. 3
Dual-float Condensate Pump—Capacity of 45 GPH (171 l/hr) at 13ft (4 m) head. Pump is complete with
integral primary and secondary float switches, pump, motor assembly and reservoir. The secondary float
shall send a signal to the local alarm and shut down the unit upon high water condition.
IntelliSlot SiteLink-E Card (IS-485EXI)—Provides ground fault isolated connection to a Liebert SiteLink-E
for monitoring and management. Compatible with Liebert SiteScan Web 4.0 or newer version.
IntelliSlot Unity™ Card (IS-UNITY-DP)—Provides ground fault isolated RS-485 Modbus, BACnet IP &
Modbus IP network connectivity to Building Management Systems for unit monitoring and management.
Also, provides ground fault isolated 10/100 baseT Ethernet connectivity for unit monitoring and
management. The supported management interfaces include: SNMP for Network Management Systems,
HTTP for web page viewing, SMTP for email, and SMS for mobile messaging. This card can support dual
IP and 485 protocols simultaneous.
Filter—The optional filters are two deep pleated 2 inch rated MERV8 (based on ASHRAE 52.2-2007)
located within the cabinet and accessible from the rear of the unit. A filter clog alarm is included.
One (1) Extra Common Alarm Contact—Provides the customer with a total of two sets of normally open
(n/o) contacts for remote indication of unit alarms.
Liqui-text Sensor—Is a solid state water sensor that has no moving parts and is hermetically sealed to
keep out dust and dirt. When the sensor detects the presence of moisture the alarm system is activated.
2.5 Water/Glycol, 600 mm (24 in.)—Standard Features
Source: DPN001905, Rev. 4
DX Cooling Coil—The evaporator coil has 7.25 ft2 (0.674 m2) face area, 4 or 5 rows deep. It is
constructed of copper tubes and hydrophilic coated aluminum fins. The hydrophilic coating provides
superior water carryover resistance. Two stainless steel condensate drain pans are provided.
Refrigeration System—Single refrigeration circuit includes a liquid line filter drier, an adjustable externally
equalized expansion valve, and a liquid line solenoid valve.
11
Liebert® CRV™ System Design Manual
Product Configuration and Features
Compressor—The compressor is an R-410A scroll-type with variable capacity operation from 20-100%;
commonly known as a Digital Scroll. Compressor solenoid valve unloads the compressor to provide
variable capacity operation. The compressor has a suction gas cooled motor, vibration isolators, internal
thermal overloads, manual reset high pressure switch, RotoLock service valves, low pressure and high
pressure transducer, crankcase heater, internal centrifugal oil pump, and an operating speed of 3500 RPM
@ 60 Hz (2900RPM @ 50 Hz).
Fan—The unit is equipped with two plug fans: direct driven centrifugal fans with backward curved blades
and Electronically Commutated DC motors; commonly referred to as EC plug fans. The fan speed is
variable and automatically regulated by the iCOM control through all modes of operation. Each fan has a
dedicated motor and speed controller which provides a level of redundancy. The fans push air through the
coil and are located on the rear panel of the unit.
Water/Glycol Condenser—Is an efficient stainless steel brazed-plate condenser. Waterside threaded
connections are provided for convenience. Proper filtration must be field supplied when used on open-loop
water systems (cooling towers, etc). When operating on a closed-loop, to avoid undesired ice formation in
the wintertime, it is advisable to use a water/glycol mixture.
3-way Modulating Valve—A 3-way modulating valve controls the water/glycol flow passing through the
brazed-plate condenser. The iCOM control manages the valve actuator movement in order to maintain the
desired condensing temperature for various entering water temperatures. The maximum differential
pressure across the closed valve is 43.5 PSI (300 kPa). Maximum system pressure is 230 PSI (1586 kPa).
Supply-air Baffle—A field adjustable, modular supply air baffle is located in the discharge air stream. It
can be quickly and easily reconfigured to redirect airflow. The angles of the vanes have been optimized to
effectively distribute air to heat generating equipment in a wide variety of applications.
iCOM Control System—The Liebert CRV is controlled by the iCOM Control System. The standard user
interface is a 9-inch, color touch screen that presents system information and allows all parameters to be
viewed and adjusted. It features a 3-level password protection system. Unit-to-unit communication with
other Liebert CRVs and two IntelliSlot communication-card housings are included as standard.
Unit-to-Unit communication with other Liebert CRVs and two IntelliSlot communication card housings are
included as standard.
2T Rack Temperature Sensors—Consist of a vented case with two temperature probes. Three (3) 2T
rack sensors are standard with each Liebert CRV. Up to ten (10) 2T housings (20 temperature probes) can
be connected to a Liebert CRV.
One (1) 2T housing and both sensor probes are to be attached to a rack the cooling unit is conditioning.
The sensors provide real-time, direct feedback to the cooling unit to optimize the amount of cooling and
airflow required; increasing energy efficiency and ensuring proper rack inlet air temperatures. The sensor
data can also be reported to remote BMS and monitoring systems. The sensor network consists of one
CAN wire leaving the cooling unit and connecting to a 2T sensor. Each remaining 2T sensor is connected
to the previous sensor; often referred to as a daisy-chain configuration.
Remote Shutdown Terminal—Provides the customer with a location to remotely shut down the unit.
Common Alarm Contact—Provides the customer with a set of normally open (n/o) contacts for remote
indication of unit alarms.
Cabinet—The exterior steel panels are custom powder coated to protect against corrosion. The double
wall constructed side panels separate the ½ inch, 2.0 lb/ft3 insulation from the air stream. The unit is
mounted on casters for quick installation and provided with leveling feet. The perforated inlet and outlet
panels have 81% open area, and the rear door utilizes a Knürr rack style handle and hinges.
Service Access—All service and maintenance is performed through the front and rear of the unit;
including any component removal. No side access is required. All electrical and piping connections are
made through the top and/or bottom of the unit. All units are provided with a Superior Service Access
Panel to provide additional access.
Filter—The unit is equipped with two deep pleated 4 inch filters rated MERV8 (based on ASHRAE
52.2-2007), located within the cabinet, and accessible from the rear of the unit. A filter clog alarm is
included.
Liebert® CRV™ System Design Manual
12
Product Configuration and Features
Locking Disconnect Switch—A molded case circuit interrupter disrupts the flow of power to the unit. The
electric panel high voltage compartment can only be accessed with the switch in the ‘off’ position.
Conveniently located behind the iCOM display door for quick access.
65,000-Amp Short-circuit Current Rating (SCCR)—The electrical panel provides a 65k amp SCCR.
2.6 Water/Glycol, 600 mm (24 in.)—Optional Features
Source: DPN001908, Rev. 4
Dual-float Condensate Pump—It has a capacity of 6 GPM (22.7 l/min) at 30ft (9 m) head. Pump is
complete with integral primary and secondary float switches, pump, motor assembly and reservoir. The
secondary float shall send a signal to the local alarm and shut down the unit upon high water condition.
Humidifier—A steam generating canister humidifier is factory-installed in the cooling unit and is operated
by the iCOM control system. It is complete with disposable cylinder, all supply and drain valves, steam
distributor and electronic controls. The need to change the canister is indicated on the iCOM display. The
humidifier is designed to operate with water conductivity from 125-500 (50 Hz) or 330-670 (60 Hz)
microS/cm. System automatically fills and drains as well as maintains the required water level based on
conductivity. An air-gap within the humidifier assembly shall prevent back flow of the humidifier supply
water. The humidifier is removable from the rear of the cabinet.
Electric Reheat—The electric reheat coils are low watt density, 304 stainless steel fin-tubular
construction, protected by thermal safety switches and controlled in one stage.
Low-noise Package—The Low Noise Package reduces the level of sound emitted from the compressor.
The package consists of a 3/8 inch closed cell polymeric 4.5 – 8.5 lbs/ft3 density compressor sound jacket
that encloses the compressor. Additional ½ inch closed cell polymeric 3 - 8 lbs/ft3 density sound
deadening material is affixed to the underside of the Superior Service Access Panel located above the
compressor and attached to the inner side of the compressor compartment panels that face the hot and
cold aisles. All sound deadening material is non-shedding and located outside of the air stream.
2-way Modulating Valve—A 2-way modulating valve controls the water/glycol flow passing through the
brazed-plate condenser. The iCOM control manages the valve actuator movement in order to maintain the
desired condensing temperature for various entering water flow rates and temperatures. The maximum
differential pressure across the closed valve is 43.5 PSI (300 kPa). Maximum system pressure is 230 PSI
(1586 kPa).
IntelliSlot Web Card (IS-WEBL)—Provides ground fault isolated 10/100 baseT Ethernet connectivity for
unit monitoring and management. The supported management interfaces include: SNMP for Network
Management Systems, HTTP for web page viewing, SMTP for email and SMS for Mobile messaging.
IntelliSlot 485 Card (IS-485L)—Provides ground fault isolated RS-485 Modbus network connectivity to
Building Management Systems for unit monitoring and management.
IntelliSlot Building-management Card (IS-IPBML)—Provides ground fault isolated Modbus IP network
connectivity to Building Management Systems for unit monitoring and management.
IntelliSlot SiteLink-E Card (IS-485EXI)—Provides ground fault isolated connection to a Liebert SiteLink-E
for monitoring and management. Compatible with Liebert SiteScan Web 4.0 or newer version.
Filter—The optional filters are two deep pleated 4 inch rated MERV11 following ASHRAE 52.2 (60-65% by
ASHRAE 52.1), located within the cabinet and accessible from the rear of the unit. A filter clog alarm is
included.
Reheat/Humidifier Lockout—Includes the necessary relays to disable the reheat and humidifier from an
external 24 volt signal.
One (1) Extra Common Alarm Contact—Provides the customer with a total of two sets of normally open
(n/o) contacts for remote indication of unit alarms.
Liqui-tect Sensor—Is a solid state water sensor that has no moving parts and is hermetically sealed to
keep out dust and dirt. When the sensor detects the presence of moisture the alarm system is activated.
13
Liebert® CRV™ System Design Manual
Product Configuration and Features
2.7 Water/Glycol, 300 mm (12 in.)—Standard Features
Source: DPN003037, Rev. 2
DX Cooling Coil—The evaporator coil has 6.46 ft2 (0.60 m2) face area, 3 rows deep. It is constructed of
copper tubes and hydrophilic coated aluminum fins. The hydrophilic coating provides superior water
carryover resistance. A stainless steel condensate drain pan is provided.
Refrigeration System—Single refrigeration circuit includes a liquid line filter drier and an adjustable
externally equalized expansion valve.
Compressor—The compressor is an R-410A scroll-type with variable capacity operation from 20-100%;
commonly known as a Digital Scroll. Compressor solenoid valve unloads the compressor to provide
variable capacity operation. The compressor has a suction gas cooled motor, vibration isolators, internal
thermal overloads, manual reset high pressure switch, Rotolock service valves, low pressure and high
pressure transducer, crankcase heater, internal centrifugal oil pump, and an operating speed of 3500 RPM
@ 60 Hz.
Fans—The unit is equipped with five plug fans: direct driven centrifugal fans with backward curved blades
and Electronically Commutated motors; commonly referred to as EC plug fans. The fan speed is variable
and automatically regulated by the iCOM control through all modes of operation. Each fan has a dedicated
motor and integrated speed controller which provides a level of redundancy. The fans pull air through the
coil and are located in the front of the unit.
Supply-air Baffle—Field adjustable, modular supply air baffles are located in the discharge air stream.
They can be quickly and easily reconfigured to redirect airflow.
iCOM Control System—The Liebert CRV is controlled by the iCOM Control System. The standard user
interface is a 9-inch, color touch screen that presents system information and allows all parameters to be
viewed and adjusted. It features a 3-level password protection system. Unit-to-unit communication with
other Liebert CRVs and two IntelliSlot communication-card housings are included as standard.
Water/Glycol Condenser—Is an efficient stainless steel brazed-plate condenser. Waterside threaded
connections are provided for convenience. Proper filtration must be field supplied when used on open-loop
water systems (cooling towers, etc). When operating on a closed-loop, to avoid undesired ice formation in
the wintertime, it is advisable to use a water/glycol mixture.
3-way Modulating Valve—A 3-way modulating valve controls the water/glycol flow passing through the
brazed-plate condenser. The iCOM control manages the valve actuator movement in order to maintain the
desired condensing temperature for various entering water temperatures. The maximum differential
pressure across the closed valve is 43.5 PSI (300 kPa). Maximum system pressure is 230 PSI (1586 kPa).
2T Rack Temperature Sensors—Consist of a vented case with two temperature probes. Three (3) 2T
rack sensors are standard with each Liebert CRV. Up to ten (10) 2T housings (20 temperature probes) can
be connected to a Liebert CRV300. One (1) 2T housing and both sensor probes are to be attached to a
rack the cooling unit is conditioning. The sensors provide real-time, direct feedback to the cooling unit to
optimize the amount of cooling and airflow required; increasing energy efficiency and ensuring proper rack
inlet air temperatures. The sensor data can also be reported to remote BMS and monitoring systems. The
sensor network consists of one CAN wire leaving the cooling unit and connecting to a 2T sensor. Each
remaining 2T sensor is connected to the previous sensor; often referred to as a daisy-chain configuration.
Remote Shutdown Terminal—Provides the customer with a location to remotely shut down the unit.
Common Alarm Contact—Provides the customer with a set of normally open (n/o) contacts for remote
indication of unit alarms.
Cabinet—The exterior steel panels are custom powder coated to protect against corrosion. The unit is
mounted on casters for quick installation and provided with leveling feet. The perforated inlet and outlet
panels have 81% open area, the front door is hinged and the rear door is liftoff.
Service Access—All service and maintenance is performed through the front and rear of the unit;
including any component removal. No side access is required. Piping connection locations must be
ordered top or bottom. Electrical connections are made through the top or bottom of the unit.
Liebert® CRV™ System Design Manual
14
Product Configuration and Features
Filter—The unit is equipped with two 1/2 inch filters rated MERV1 (based on ASHRAE 52.2-2007), located
within the cabinet, and accessible from the rear of the unit. A filter clog alarm is included.
Locking Disconnect Switch—A molded case circuit interrupter disrupts the flow of power to the unit. The
electric panel high voltage compartment can only be accessed with the switch in the ‘off’ position located
behind the rear door and filters for access.
65,000-Amp Short-circuit Current Rating (SCCR)—The electrical panel provides a 65k amp SCCR.
2.8 Water/Glycol, 300 mm (12 in.)—Optional Features
Source: DPN003038, Rev. 1
Dual-float Condensate Pump—Capacity of 45 GPH (171 l/hr) at 13ft (4 m) head. Pump is complete with
integral primary and secondary float switches, pump, motor assembly and reservoir. The secondary float
shall send a signal to the local alarm and shut down the unit upon high water condition.
IntelliSlot SiteLink-E Card (IS-485EXI)—Provides ground fault isolated connection to a Liebert SiteLink-E
for monitoring and management. Compatible with Liebert SiteScan Web 4.0 or newer version.
IntelliSlot Unity Card (IS-UNITY-DP)—Provides ground fault isolated RS-485 Modbus, BACnet IP &
Modbus IP network connectivity to Building Management Systems for unit monitoring and management.
Also, provides ground fault isolated 10/100 baseT Ethernet connectivity for unit monitoring and
management. The supported management interfaces include: SNMP for Network Management Systems,
HTTP for web page viewing, SMTP for email, and SMS for mobile messaging. This card can support dual
IP and 485 protocols simultaneous.
Filter—The optional filters are two deep pleated 2 inch rated MERV8 (based on ASHRAE 52.2-2007)
located within the cabinet and accessible from the rear of the unit. A filter clog alarm is included.
One (1) Extra Common Alarm Contact—Provides the customer with a total of two sets of normally open
(n/o) contacts for remote indication of unit alarms.
Liqui-tect Sensor—Is a solid state water sensor that has no moving parts and is hermetically sealed to
keep out dust and dirt. When the sensor detects the presence of moisture the alarm system is activated.
2-way Modulating Valve—A 2-way modulating valve controls the water/glycol flow passing through the
brazed-plate condenser. The iCOM control manages the valve actuator movement in order to maintain the
desired condensing temperature for various entering water flow rates and temperatures. The maximum
differential pressure across the closed valve is 43.5 PSI (300 kPa). Maximum system pressure is 230 PSI
(1586 kPa).
2.9 Chilled-water, 600 mm (24 in.)—Standard Features
Source: DPN001906, Rev. 6
CW Cooling Coil—The evaporator coil has 7.25 ft2 (0.674 m2) face area, 6 rows deep. It is constructed of
copper tubes and hydrophilic coated aluminum fins. The hydrophilic coating provides superior water
carryover resistance. Two stainless steel condensate drain pans are provided.
Chilled-water System—The water circuit includes a 3-way modulating valve. The Liebert iCOM control
positions the valve in response to room conditions. Cooling capacity will be controlled by bypassing chilled
water around the coil.
Fan—The unit is equipped with two plug fans: direct driven centrifugal fans with backward curved blades
and Electronically Commutated DC motors; commonly referred to as EC plug fans. The fan speed is
variable and automatically regulated by the iCOM control through all modes of operation. Each fan has a
dedicated motor and speed controller which provides a level of redundancy. The fans push air through the
coil and are located on the rear panel of the unit.
15
Liebert® CRV™ System Design Manual
Product Configuration and Features
3-way Modulating Valve—A 3-way modulating valve controls the chilled water flow passing through the
cooling coil. The iCOM control manages the valve actuator movement in order to provide the desired
amount of cooling for various entering water temperatures. Cooling capacity is regulated by bypassing
chilled water around the coil. The maximum differential pressure across the closed valve is 200 PSI
(1379 kPa). Maximum system pressure is 325 PSI (2241 kPa).
Supply-air Baffle—A field adjustable, modular supply air baffle is located in the discharge air stream. It
can be quickly and easily reconfigured to redirect airflow. The angles of the vanes have been optimized to
effectively distribute air to heat generating equipment in a wide variety of applications.
iCOM Control System—The Liebert CRV is controlled by the iCOM Control System. The standard user
interface is a 9-inch, color touch screen that presents system information and allows all parameters to be
viewed and adjusted. It features a 3-level password protection system. Unit-to-unit communication with
other Liebert CRVs and two IntelliSlot communication-card housings are included as standard.
Unit-to-Unit communication with other Liebert CRVs and two IntelliSlot communication card housings are
included as standard.
2T Rack Temperature Sensors—Consist of a vented case with two temperature probes. Three (3) 2T
rack sensors are standard with each Liebert CRV. Up to ten (10) 2T housings (20 temperature probes) can
be connected to a Liebert CRV.
One (1) 2T housing and both sensor probes are to be attached to a rack the cooling unit is conditioning.
The sensors provide real-time, direct feedback to the cooling unit to optimize the amount of cooling and
airflow required; increasing energy efficiency and ensuring proper rack inlet air temperatures. The sensor
data can also be reported to remote BMS and monitoring systems. The sensor network consists of one
CAN wire leaving the cooling unit and connecting to a 2T sensor. Each remaining 2T sensor is connected
to the previous sensor; often referred to as a daisy-chain configuration.
Remote Shutdown Terminal—Provides the customer with a location to remotely shut down the unit.
Common Alarm Contact—Provides the customer with a set of normally open (n/o) contacts for remote
indication of unit alarms.
Cabinet—The exterior steel panels are custom powder coated to protect against corrosion. The double
wall constructed side panels separate the ½ inch, 2.0 lb/ft3 insulation from the air stream. The unit is
mounted on casters for quick installation and provided with leveling feet. The perforated inlet and outlet
panels have 81% open area, and the rear door utilizes a Knürr rack style handle and hinges.
Service Access—All service and maintenance is performed through the front and rear of the unit;
including any component removal. No side access is required. All electrical and piping connections are
made through the top and/or bottom of the unit. All units are provided with a Superior Service Access
Panel to provide additional access.
Filter—the unit is equipped with two deep pleated 4 inch filters rated MERV8 (based on ASHRAE 52.22007), located within the cabinet, and accessible from the rear of the unit. A filter clog alarm is included.
Locking Disconnect Switch—A molded case circuit interrupter disrupts the flow of power to the unit. The
electric panel high voltage compartment can only be accessed with the switch in the ‘off’ position.
Conveniently located behind the iCOM display door for quick access.
65,000-Amp Short-circuit Rating (SCCR)—The electrical panel provides a 65k amp SCCR.
2.10 Chilled-water, 600 mm (24 in.)—Optional Features
Source: DPN001909, Revision 5
Dual-float Condensate Pump—It has a capacity of 6 GPM (22.7 l/min) at 30ft (9 m) head. Pump is
complete with integral primary and secondary float switches, pump, motor assembly and reservoir. The
secondary float shall send a signal to the local alarm and shut down the unit upon high water condition.
Humidifier—A steam generating canister humidifier is factory-installed in the cooling unit and is operated
by the iCOM control system.
Liebert® CRV™ System Design Manual
16
Product Configuration and Features
It is complete with disposable cylinder, all supply and drain valves, steam distributor and electronic
controls. The need to change the canister is indicated on the iCOM display. The humidifier is designed to
operate with water conductivity from 125-500 (50 Hz) or 330-670 (60 Hz) microS/cm. System automatically
fills and drains as well as maintains the required water level based on conductivity. An air-gap within the
humidifier assembly shall prevent back flow of the humidifier supply water. The humidifier is removable
from the rear of the cabinet.
Electric Reheat—The electric reheat coils are low watt density, 304 stainless steel fin-tubular
construction, protected by thermal safety switches and controlled in one stage.
2-way Modulating Valve—A 2-way modulating valve controls the chilled water flow passing through the
cooling coil. The iCOM control manages the valve actuator movement in order to provide the desired
amount of cooling for various entering water temperatures. Cooling capacity is regulated by varying the
chilled water flow. The maximum differential pressure across the closed valve is 200 PSI (1379 kPa).
Maximum system pressure is 325 PSI (2241 kPa).
IntelliSlot Web Card (IS-WEBL)—Provides ground fault isolated 10/100 baseT Ethernet connectivity for
unit monitoring and management. The supported management interfaces include: SNMP for Network
Management Systems, HTTP for web page viewing, SMTP for email and SMS for Mobile messaging.
IntelliSlot 485 Card (IS-485L)—Provides ground fault isolated RS-485 Modbus network connectivity to
Building Management Systems for unit monitoring and management.
IntelliSlot Building-management Card (IS-IPBML)—Provides ground fault isolated Modbus IP network
connectivity to Building Management Systems for unit monitoring and management.
IntelliSlot SiteLink-E Card (IS-485EXI)—Provides ground fault isolated connection to a Liebert SiteLink-E
for monitoring and management. Compatible with Liebert SiteScan Web 4.0 or newer version.
Filter—The optional filters are two deep pleated 4 inch rated MERV11 following ASHRAE 52.2 (60-65% by
ASHRAE 52.1), located within the cabinet and accessible from the rear of the unit. A filter clog alarm is
included.
Reheat/Humidifier Lockout—Includes the necessary relays to disable the reheat and humidifier from an
external 24 volt signal.
One (1) Extra Common Alarm Contact—Provides the customer with a total of two sets of normally open
(n/o) contacts for remote indication of unit alarms.
Liqui-tect Sensor—Is a solid state water sensor that has no moving parts and is hermetically sealed to
keep out dust and dirt. When the sensor detects the presence of moisture the alarm system is activated.
2.11 Chilled-water, 300 mm (12 in.)—Standard Features
Source: DPN002974, Rev. 5
CW Cooling Coil—The 300 series evaporator coil is 3 rows deep with the 32kW model having 7.8ft2
(0.72m2) of face area. It is constructed of copper tubes and hydrophilic coated aluminum fins. The
hydrophilic coating provides superior water carryover resistance. A stainless steel condensate drain pan is
provided.
Chilled-water System—The water circuit includes a characterized 3-way modulating ball valve. The
Liebert iCOM control positions the valve in response to room conditions. Cooling capacity will be controlled
by bypassing chilled water around the coil. The maximum differential pressure across the closed valve is
200 PSI (1379 kPa). Maximum system pressure is 325 PSI (2241 kPa).
Fans—The unit is equipped with six plug fans: direct driven centrifugal fans with backward curved blades
and Electronically Commutated motors; commonly referred to as EC plug fans. The fan speed is variable
and automatically regulated by the iCOM control through all modes of operation. Each fan has a dedicated
motor and integrated speed controller which provides a level of redundancy. The fans pull air through the
coil and are located in the front of the unit.
Supply-air Baffle—Field adjustable, modular supply air baffles are located in the discharge air stream.
They can be quickly and easily reconfigured to redirect airflow.
17
Liebert® CRV™ System Design Manual
Product Configuration and Features
iCOM Control System—The Liebert CRV is controlled by the iCOM Control System. The standard user
interface is a 9-inch, color touch screen that presents system information and allows all parameters to be
viewed and adjusted. It features a 3-level password protection system. Unit-to-unit communication with
other Liebert CRVs and two IntelliSlot communication-card housings are included as standard.
2T Rack Temperature Sensors—Consist of a vented case with two temperature probes. Three (3) 2T
rack sensors are standard with each Liebert CRV. Up to ten (10) 2T housings (20 temperature probes) can
be connected to a Liebert CRV300. One (1) 2T housing and both sensor probes are to be attached to a
rack the cooling unit is conditioning. The sensors provide real-time, direct feedback to the cooling unit to
optimize the amount of cooling and airflow required; increasing energy efficiency and ensuring proper rack
inlet air temperatures. The sensor data can also be reported to remote BMS and monitoring systems. The
sensor network consists of one CAN wire leaving the cooling unit and connecting to a 2T sensor. Each
remaining 2T sensor is connected to the previous sensor; often referred to as a daisy-chain configuration.
Remote Shutdown Terminal—Provides the customer with a location to remotely shut down the unit.
Common Alarm Contact—Provides the customer with a set of normally open (n/o) contacts for remote
indication of unit alarms.
Cabinet—The exterior steel panels are custom powder coated to protect against corrosion. The unit is
mounted on casters for quick installation and provided with leveling feet. The perforated inlet and outlet
panels have 81% open area, the front door is hinged and the rear door is liftoff.
Service Access—All service and maintenance is performed through the front and rear of the unit;
including any component removal. No side access is required. All electrical and piping connections are
made through the top and/or bottom of the unit.
Filter—The unit is equipped with two 1/2 inch filters rated MERV1 (based on ASHRAE 52.2-2007), located
within the cabinet, and accessible from the rear of the unit. A filter clog alarm is included.
Locking Disconnect Switch—A molded case circuit interrupter disrupts the flow of power to the unit. The
electric panel high voltage compartment can only be accessed with the switch in the ‘off’ position located
behind the rear door and filters for access.
Short-circuit Current Rating (SCCR)—The electrical panel provides a 65k amp SCCR for 208-V & 460-V
units, and 5k amp SCCR rating for 120 V units.
2.12 Chilled-water, 300 mm (12 in.)—Optional Features
Source: DPN002973, Rev. 2
Dual-float Condensate Pump—Capacity of 45 GPH (171 l/hr) at 13ft (4 m) head. Pump is complete with
integral primary and secondary float switches, pump, motor assembly and reservoir. The secondary float
shall send a signal to the local alarm and shut down the unit upon high water condition.
2-way Modulating Valve—A 2-way modulating valve controls the chilled water flow passing through the
cooling coil. The iCOM control manages the valve actuator movement in order to provide the desired
amount of cooling for various entering water temperatures. Cooling capacity is regulated by varying the
chilled water flow. The maximum differential pressure across the closed valve is 200 PSI (1379 kPa).
Maximum system pressure is 325 PSI (2241 kPa).
IntelliSlot SiteLink-E Card (IS-485EXI)—Provides ground fault isolated connection to a Liebert SiteLink-E
for monitoring and management. Compatible with Liebert SiteScan Web 4.0 or newer version.
IntelliSlot Unity Card (IS-UNITY-DP)—Provides ground fault isolated RS-485 Modbus, BACnet IP &
Modbus IP network connectivity to Building Management Systems for unit monitoring and management.
Also, provides ground fault isolated 10/100 baseT Ethernet connectivity for unit monitoring and
management. The supported management interfaces include: SNMP for Network Management Systems,
HTTP for web page viewing, SMTP for email, and SMS for mobile messaging. This card can support dual
IP and 485 protocols simultaneous.
Filter—The optional filters are two deep pleated 2 inch rated MERV8 (based on ASHRAE 52.2-2007)
located within the cabinet and accessible from the rear of the unit. A filter clog alarm is included.
Liebert® CRV™ System Design Manual
18
Product Configuration and Features
One (1) Extra Common Alarm Contact—Provides the customer with a total of two sets of normally open
(n/o) contacts for remote indication of unit alarms.
Liqui-tect Sensor—Is a solid state water sensor that has no moving parts and is hermetically sealed to
keep out dust and dirt. When the sensor detects the presence of moisture the alarm system is activated.
19
Liebert® CRV™ System Design Manual
Product Configuration and Features
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Liebert® CRV™ System Design Manual
20
System Data
3.0 System Data
3.1 Air-cooled Systems
3.1.1
Capacity and Physical Data—Air-cooled Systems
Table 3-1
Performance data—Air-cooled, 600 mm (24 in.)
Standard 95°F (35°C) Ambient Condenser
CR020RA
Return Air Temperature
CR035RA
MC™
Liebert Fin and
Tube Condenser
Liebert
Condenser
Liebert Fin and
Tube Condenser
Liebert MC™
Condenser
105°F DB, 71°F WB (40.6°C DB, 21.6°C WB) 17% RH
Total kBTU/H (kW)
87.2 (25.5)
90.7 (26.6)
142.8 (41.8)
141.3 (41.4)
Sensible kBTU/H (kW
87.2 (25.5)
90.7 (26.6)
142.8 (41.8)
141.3 (41.4)
100°F DB, 69.5°F WB (37.8°C DB, 20.8°C WB) 20% RH
Total kBTU/H (kW)
83.5 (24.5)
86.8 (25.4)
136.9 (40.1)
135.5 (39.7)
Sensible kBTU/H (kW
83.5 (24.5)
86.8 (25.4)
136.9 (40.1)
135.5 (39.7)
95°F DB, 67.9°F WB (35°C DB, 19.9°C WB) 23% RH
Total kBTU/H (kW)
79.8 (23.4)
82.9 (24.3)
131.7 (38.6)
130.1 (38.1)
Sensible kBTU/H (kW
79.8 (23.4)
82.9 (24.3)
130.0 (38.1)
129 (37.8)
90°F DB, 66.2°F WB (32.2°C DB, 19.0°C WB) 27% RH
Total kBTU/H (kW)
76.1 (22.3)
79.1 (23.2)
127.5 (37.4)
125.9 (36.9)
Sensible kBTU/H (kW
76.1 (22.3)
79.1 (23.2)
121.3 (35.5)
120.5 (35.3)
85°F DB, 64.5°F WB (29.4°C DB, 18.1°C WB) 31% RH
Total kBTU/H (kW)
72.8 (21.3)
76.1 (22.3)
123.8 (36.3)
122.2 (35.8)
Sensible kBTU/H (kW
71.9 (21.1)
73.8 (21.6)
112.0 (32.8)
111.2 (32.6)
80°F DB, 62.8°F WB (26.7°C DB, 17.1°C WB) 37% RH
Total kBTU/H (kW)
70.5 (20.7)
73.8 (21.6)
120.3 (35.2)
118.8 (34.8)
Sensible kBTU/H (kW
65.5 (19.2)
67.1 (19.7)
102.3 (30.0)
101.5 (29.7)
1. The net capacity data has fan motor heat factored in for all ratings.
2. Capacity data is factory-certified to be within 5% tolerance.
3. Data rated with standard filter.
21
Liebert® CRV™ System Design Manual
System Data
Table 3-2
Performance data—Air-cooled, 300 mm (12 in.)
Standard 95°F (35°C)
Ambient Condenser @ 2250 CFM
CR019RA
Return Air Temperature
MC Condenser
105°F DB, 71°F WB (40.6°C DB, 21.6°C WB) 17% RH
Total, kBTU/H (kW)
87.1 (25.5)
Sensible, kBTU/H (kW)
87.1 (25.5)
100°F DB, 69.1°F WB (37.8°C DB, 20.8°C WB) 20% RH
Total, kBTU/H (kW)
83.5 (24.5)
Sensible, kBTU/H (kW)
83.5 (24.5)
95°F DB, 67.4°F WB (35°C DB, 19.9°C WB) 23% RH
Total, kBTU/H (kW)
Sensible, kBTU/H (kW)
80 (23.4)
79.8 (23.4)
90°F DB, 65.9°F WB (32.2°C DB, 19.0°C WB) 27% RH
Total, kBTU/H (kW)
77.5 (22.7)
Sensible, kBTU/H (kW)
74.5 (21.8)
85°F DB, 64.0°F WB (29.4°C DB, 18.1°C WB) 31% RH
Total, kBTU/H (kW)
Sensible, kBTU/H (kW)
75 (22)
69.1 (20.3)
80°F DB, 62.8°F WB (26.7°C DB, 17.1°C WB) 37% RH
Total, kBTU/H (kW)
73.1 (21.4)
Sensible, kBTU/H (kW)
62.8 (18.4)
1. The net capacity data has fan motor heat factored in for all ratings.
2. Capacity data is factory-certified to be within 5% tolerance.
3. Data rated with standard filter.
Liebert® CRV™ System Design Manual
22
System Data
Table 3-3
Physical data—Air-cooled, 600 mm (24 in.)
Parameter
CR020RA
CR035RA
Total Airflow, CFM (m3/h)
2454 (4170)
3260 (5540)
Total Fan Motor, hp (kW)
0.8 (0.6)
Fan Data
1.4 (1.06)
Number of Fans
2
Evaporator Coil
Face Area, ft2 (m2)
7.26 (0.674)
Rows
Face Velocity, FPM (m/s)
4
5
339 (1.72)
449 (2.28)
Electric Reheat Single Stage
Capacity, BTU/H (kW)
460 V: 20,472 (6.0) 208 V: 16,719 (4.9)
Steam Generating Humidifier
Capacity, lb/hr (kg/hr)
5.0 (2.3)
Capacity, kW
1.79
Condensate Pump - Dual Float Type
Capacity, GPM (l/m)
6.0 (22.7)
Filter Section - Disposable Type
MERV 8 - Standard Pleated Filter
Number
Nominal Size, in (mm)
2
31-1/2 x 17-1/2 x 4 (800 x 445 x 100)
Effective Surface Area - ft2 (m2)
16.4 (1.52)
MERV 11 - Optional Pleated Filter
Quantity
Nominal Size, in (mm)
2
31-1/2 x 17-1/2 x 4 (800 x 445 x 100)
Effective Surface Area - ft2 (m2)
16.4 (1.52)
23
Liebert® CRV™ System Design Manual
System Data
Table 3-4
Physical data—Air-cooled, 300 mm (12 in.)
19kW Model
System
DX
Fan Data
Total Airflow, CFM (m3/h)
2250 (3823)
Total Fan Motor, hp (kW)
0.65 (0.48)
Number of Fans
5
Evaporator Coil
Face Area, ft2 (m2)
6.46 (0.6)
Rows
3
Face Velocity, FPM (m/s)
348 (1.77)
Condensate Pump - Dual Float Type
Capacity, GPM (l/m)
Condensate pump is rated for approximately
4.6 GPH at 17 feet (.28 l/m at 5.18 m) total head.
Maximum coil condensate design flow rate
is 4.6 GPH.
Filter Section—MERV 1, Washable Type
Quantity
2
Nominal Size, in (mm)
35.5 x 10.6 x 0.4
(902 x 269 x 10)
Effective Surface Area, ft2 (m2)
3.1.2
2.3 (0.21)
Operating Limits—Air-Cooled Systems
The Liebert CRV is designed to operate within the working ranges in Table 3-5. These limits refer to new
units and those that have been correctly installed and serviced.
Table 3-5
Operating limits—Air-cooled Systems
Design Condition
Parameter
Unit Entering
Air Conditions
Temperature
Storage Conditions
Temperature
Relative Humidity
Maximum
75°F (23.9°C)
110°F(43.3°C)
15%
60%
-4°F (-20°C)
122°F (50°C)
Voltage ± 10%
Power Supply Tolerances
Liebert® CRV™ System Design Manual
Minimum
Frequency ±2Hz
24
System Data
3.1.3
Sound Data—Air-Cooled Systems
Tables 3-6 and 3-7 show the sound pressure level in free field at 5ft. (1.5 m) high and 6-1/2ft. (2 m) in front
of the air conditioner, with compressor and fan in operation. The sound data is without the Low Sound
Package compressor jacket and sound-deadening panel insulation installed.
Sound power is an absolute measurement that can be used for comparisons when all sound measurement
parameters match exactly.
Table 3-6
Sound data—Air-cooled CR020RA, 600 mm (24 in.)
2 Fans with Filter
Airflow
Fan
Speed %
SCFM
100
75
55
At Suction Side,
2m Distance,
Free Field
Conditions
(2m, f.f, dBA)
Octave Band Frequency (Hz)
m3/h
31.5
dB
63
dB
2454
4170
73.8
2166
3680
71.2
1780
3025
67.6
Table 3-7
1000
dB
2000
dB
8000
dB
A-Scale
Weighted
dB (A)
68.2
59.2
79.6
69.2
65.6
56.6
77
66.9
53
73.4
63.9
125
dB
250
dB
500
dB
69.4
71
77.3
75.9
74.2
73.5
66.8
68.4
74.7
73.3
71.6
70.9
63.2
64.8
71.1
69.7
68
67.3
62
4000
dB
Sound data—Air-cooled, CR035RA, 600 mm (24 in.)
2 Fans with Filter
Sound Pressure
Level (SPL)
Sound Power Level (PWL)
Airflow
Fan
Speed % SCFM
Sound Pressure
Level (SPL)
Sound Power Level (PWL)
Octave Band Frequency (Hz)
m3/h
31.5
dB
63
dB
125
dB
250
dB
500
dB
1000
dB
2000
dB
4000
dB
8000
dB
A-Scale
Weighted
dB (A)
At Suction Side,
2m Distance,
Free Field
Conditions
(2m, f.f, dBA)
100
3260
5540
76
76.2
80.5
82.7
77.3
73.1
74.5
69
61.9
80.9
70
75
2708
4600
71.3
71.5
75.8
78
72.6
68.4
69.8
64.3
57.2
76.2
65.7
50
2048
3480
66.3
66.5
70.8
73
67.6
63.4
64.8
59.3
52.2
71.2
61.9
Table 3-8
Sound data—Air-cooled and Water/Glycol-cooled CR019RAS, 300 mm (12 in.)
5 Fans with Filter
Sound Power Level (PWL)
Airflow
Sound Pressure Level (SPL)
At Discharge
At Suction
Side,
Side,
2m Distance,
2m Distance,
1.5m
1.5m
Above Ground, Above Ground,
A-Scale
Free Field
Free Field
500 1000 2000 4000 8000 Weighted Inlet Outlet
Conditions
Conditions
(2m, f.f, dBA)
dB(A)
dB(A) dB(A) (2m, f.f, dBA)
dB
dB
dB
dB
dB
Octave Band Frequency (Hz)
Fan
Speed
%
SCFM
m3/h
31.5
dB
63
dB
125
dB
100
2610
4435
—
—
72.2 82.3 81.5 81.2
78.1
70.2
64.7
85.4
76.7
82.6
65.7
71.6
75
2216
3765
—
—
69.7 79.0 79.1 77.4
73.9
65.9
62.3
81.6
72.7
79.9
61.8
68.9
50
1615
2744
—
—
71.1 66.1 67.2 65.1
59.5
55.2
51.8
69.4
62.0
70.2
51.0
59.2
250
dB
1. Normal operation of unit at 208- 230 V/3 ph/60 Hz
25
Liebert® CRV™ System Design Manual
System Data
3.2 Water/Glycol Systems
3.2.1
Capacity and Physical Data—Water/Glycol Systems
Table 3-9
Performance data—Water-cooled CR020RW, 600 mm (24 in.)
Return Air Temperature
83°F (28.33°C) EWT
95°F (35°C) LWT
105°F DB, 71°F WB (40.6°C DB, 21.6°C WB) 17% RH
Total, kBTU/H (kW)
28.0 (95.7)
Sensible, kBTU/H (kW)
28.0 (95.7)
Flow Rate, GPM (l/s)
19.0 (1.2)
Pressure Drop, ft water (kPa)
45.9 (137.1)
Heat Rejection, kBTU/H (kW)
113.6 (33.3)
100°F DB, 69.5°F WB (37.8°C DB, 20.8°C WB) 20% RH
Total, kBTU/H (kW)
91.5 (26.8)
Sensible, kBTU/H (kW)
91.5 (26.8)
Flow Rate, GPM (l/s)
18.2 (1.15)
Pressure Drop, ft water (kPa)
42.5 (126.9)
Heat Rejection, kBTU/H (kW)
109.3 (26.8)
85°F (29.4°C) EWT 110°F (43.3°C) Cond.
Temp.
27.6 (94.1)
27.6 (94.1)
14.2 (0.9)
26.3 (78.5)
113 (33.1)
90.0 (26.4)
90.0 (26.4)
13.6 (0.85)
24 (71.9)
108.8 (31.9)
95°F DB, 67.9°F WB (35°C DB, 19.9°C WB) 23% RH
Total, kBTU/H (kW)
Sensible, kBTU/H (kW)
Flow Rate, GPM (l/s)
Pressure Drop, ft water (kPa)
Heat Rejection, kBTU/H (kW)
90°F DB, 66.2°F WB (32.2°C DB,
Total, kBTU/H (kW)
Sensible, kBTU/H (kW)
Flow Rate, GPM (l/s)
Pressure Drop, ft water (kPa)
Heat Rejection, kBTU/H (kW)
85°F DB, 64.5°F WB (29.4°C DB,
Total, kBTU/H (kW)
Sensible, kBTU/H (kW)
Flow Rate, GPM (l/s)
Pressure Drop, ft water (kPa)
Heat Rejection, kBTU/H (kW)
80°F DB, 62.8°F WB (26.7°C DB,
Total, kBTU/H (kW)
Sensible, kBTU/H (kW)
Flow Rate, GPM (l/s)
Pressure Drop, ft water (kPa)
Heat Rejection, kBTU/H (kW)
80°F DB, 66.5°F WB (26.7°C DB,
Total, kBTU/H (kW)
Sensible, kBTU/H (kW)
Flow Rate, GPM (l/s)
Pressure Drop, ft water (kPa)
Heat Rejection, kBTU/H (kW)
87.6 (25.7)
87.2 (25.6)
17.6 (1.11)
39.7 (118.7)
105.2 (25.7)
19.0°C WB) 27% RH
84.7 (24.8)
81.5 (23.9)
17.1 (1.08)
37.6 (112.4)
102.2 (24.8)
18.1°C WB) 31% RH
82.2 (24.1)
75.1 (22.0)
16.6 (1.05)
35.5 (106.2)
99.6 (24.1)
17.1°C WB) 37% RH
79.8 (23.4)
68.6 (20.1)
16.2 (1.03)
34.0 (101.7)
97.1 (23.4)
19.2°C WB) 50% RH
85.1 (24.9)
60.5 (17.7)
17.1 (1.08)
37.6 (112.4)
102.9 (30.1)
1. The net capacity data has fan motor heat factored in for all ratings.
2. Capacity data is factory-certified to be within 5% tolerance.
3. Data rated with standard filter.
Liebert® CRV™ System Design Manual
26
86.0 (25.2)
85.9 (25.2)
12.9 (0.81)
21.9 (65.5)
104.6 (30.6)
82.8 (24.3)
80.5 (23.6)
12.3 (0.77)
20.0 (59.7)
101.3 (29.7)
80.3 (23.5)
74.2 (21.8)
11.8 (0.74)
18.5 (55.3)
98.7 (28.9)
78.0 (22.9)
67.7 (19.8)
11.7 (0.74)
18.2 (54.4)
96.3 (28.2)
83.1 (24.4)
59.7 (17.5)
12.5 (0.79)
20.6 (61.5)
101.6 (29.8)
System Data
Table 3-10 Performance data—Water-cooled CR035RW, 600 mm (24 in.)
Return Air Temperature
85°F (29.4°C) EWT 83°F (28.33°C) EWT 110°F(43.3°C) Cond. Temp.
95°F (35°C) LWT
105°F DB, 71°F WB (40.6°C DB, 21.6°C WB) 17% RH
Total, kBTU/H (kW)
152.3 (44.6)
150.3 (44.0)
Sensible, kBTU/H (kW)
152.3 (44.6)
150.3 (44)
30.1 (1.9)
23.5 (1.48)
Pressure Drop, ft water (kPa)
Flow Rate, GPM (l/s)
66.8 (199.6)
41.2 (123.2)
Heat Rejection, kBTU/H (kW)
180.2 (52.8)
179.6 (52.6)
100°F DB, 69.5°F WB (37.8°C DB, 20.8°C WB) 20% RH
Total, kBTU/H (kW)
147.2 (43.1)
144.7 (42.4)
Sensible, kBTU/H (kW)
144.5 (42.3)
143.1 (41.9)
Flow Rate, GPM (l/s)
29.2 (1.85)
22.5 (1.42)
Pressure Drop, ft water (kPa)
63.1 (188.5)
37.8 (113)
Heat Rejection, kBTU/H (kW)
175.0 (51.3)
174.1 (51)
95°F DB, 67.9°F WB (35°C DB, 19.9°C WB) 23% RH
Total, kBTU/H (kW)
142.9 (41.9)
140.2 (41.1)
Sensible, kBTU/H (kW)
135.6 (39.8)
134.4 (39.4)
29.8 (1.8)
21.5 (1.35)
Pressure Drop, ft water (kPa)
Flow Rate, GPM (l/s)
60.0 (179.2)
34.6 (103.3)
Heat Rejection, kBTU/H (kW)
170.7 (50)
169.5 (49.7)
90°F DB, 66.2°F WB (32.2°C DB, 19.0°C WB) 27% RH
Total, kBTU/H (kW)
138.7 (40.7)
135.9 (39.8)
Sensible, kBTU/H (kW)
126.6 (37.1)
125.3 (36.7)
27.8 (1.75)
20.3 (1.28)
Pressure Drop, ft water (kPa)
Flow Rate, GPM (l/s)
56.9 (170.2)
31.1 (92.9)
Heat Rejection, kBTU/H (kW)
166.5 (48.8)
165.3 (48.4)
85°F DB, 64.5°F WB (29.4°C DB, 18.1°C WB) 31% RH
Total, kBTU/H (kW)
134.8 (39.5)
132.1 (38.7)
Sensible, kBTU/H (kW)
117.3 (34.4)
116.1 (34)
27.1 (1.71)
20.3 (1.28)
Pressure Drop, ft water (kPa)
Flow Rate, GPM (l/s)
54.5 (162.9)
31.0 (92.8)
Heat Rejection, kBTU/H (kW)
162.5 (47.6)
161.5 (47.3)
80°F DB, 62.8°F WB (26.7°C DB, 17.1°C WB) 37% RH
Total, kBTU/H (kW)
130.9 (38.4)
128.4 (37.6)
Sensible, kBTU/H (kW)
107.7 (31.6)
106.5 (31.2)
Flow Rate, GPM (l/s)
26.0 (1.64)
19.8 (1.25)
Pressure Drop, ft water (kPa)
50.2 (150)
29.5 (88.3)
Heat Rejection, kBTU/H (kW)
158.6 (46.5)
157.6 (46.2)
80°F DB, 66.5°F WB (26.7°C DB, 19.2°C WB) 50% RH
Total, kBTU/H (kW)
139.5 (40.9)
136.8 (40.1)
Sensible, kBTU/H (kW)
95.8 (28.1)
94.6 (27.7)
Flow Rate, GPM (l/s)
28.0 (1.77)
21.2 (1.34)
Pressure Drop, ft water (kPa)
57.9 (173.2)
33.7 (100.8)
Heat Rejection, kBTU/H (kW)
167.3 (49.0)
166.1 (48.7)
1. The net capacity data has fan motor heat factored in for all ratings.
2. Capacity data is factory-certified to be within 5% tolerance.
3. Data rated with standard filter.
27
Liebert® CRV™ System Design Manual
System Data
Table 3-11 Performance data—Glycol-cooled CR035RW and CR020RW, 600 mm (24 in.)
Return Air Temperature
Glycol (40% Propylene) 104°F (40°C) EGT - 115°F (46.1°C) LGT
CR035RW
CR020RW
Total, kBTU/H (kW)
141.4 (41.5)
88.3 (25.9)
Sensible, kBTU/H (kW)
141.4 (41.5)
88.3 (25.9)
Flow Rate, GPM (l/s)
34.4 (2.17)
21.8 (1.37)
Pressure Drop, ft. water (kPa)
98.2 (293.6)
67.6 (202.2)
Heat Rejection, kBTU/H (kW)
177.3 (52.0)
111.0 (32.6)
105°F DB, 71°F WB (40.6°C DB, 21.6°C WB) 17% RH
100°F DB, 69.5°F WB (37.8°C DB, 20.8°C WB) 20% RH
Total, kBTU/H (kW)
135.5 (39.7)
84.4 (24.7)
Sensible, kBTU/H (kW)
135.5 (39.7)
84.4 (24.7)
Flow Rate, GPM (l/s)
33.5 (2.11)
21.0 (1.32)
Pressure Drop, ft. water (kPa)
93.4 (279.2)
63.2 (189.0)
Heat Rejection, kBTU/H (kW)
171.2 (50.2)
107.0 (31.4)
Total, kBTU/H (kW)
129.9 (38.0)
80.5 (23.6)
Sensible, kBTU/H (kW)
128.9 (37.7)
80.5 (23.6)
Flow Rate, GPM (l/s)
32.4 (2.04)
20.1 (1.27)
Pressure Drop, ft. water (kPa)
87.4 (261.3)
58.3 (174.2)
Heat Rejection, kBTU/H (kW)
165.5 (48.5)
102.9 (30.2)
Total, kBTU/H (kW)
125.7 (36.8)
76.6 (22.5)
Sensible, kBTU/H (kW)
120.5 (35.3)
76.6 (22.5)
Flow Rate, GPM (l/s)
32.0 (2.02)
19.4 (1.22)
Pressure Drop, ft. water (kPa)
85.4 (255.4)
54.2 (161.9)
Heat Rejection, kBTU/H (kW)
161.1 (47.2)
98.9 (29)
Total, kBTU/H (kW)
121.8 (35.7)
73.9 (21.6)
Sensible, kBTU/H (kW)
111.3 (32.6)
71.2 (20.9)
18.9 (1.19)
95°F DB, 67.9°F WB (35°C DB, 19.9°C WB) 23% RH
90°F DB, 66.2°F WB (32.2°C DB, 19.0°C WB) 27% RH
85°F DB, 64.5°F WB (29.4°C DB, 18.1°C WB) 31% RH
Flow Rate, GPM (l/s)
31.0 (1.96)
Pressure Drop, ft, water (kPa)
80.3 (240.1)
51.5 (154)
Heat Rejection, kBTU/H (kW)
157.4 (46.1)
95.9 (28.1)
Total, kBTU/H (kW)
118.2 (34.7)
71.6 (21.0)
Sensible, kBTU/H (kW)
101.8 (29.8)
65.6 (19.2)
30.1 (1.9)
13.1 (0.8)
Pressure Drop, ft. water (kPa)
76.0 (227.1)
25.9 (77.4)
Heat Rejection, kBTU/H (kW)
153.7 (45.1)
93.3 (27.3)
Total, kBTU/H (kW)
126.0 (36.9)
76.3 (22.4)
Sensible, kBTU/H (kW)
90.0 (26.4)
56.8 (16.6)
Flow Rate, GPM (l/s)
31.6 (2.0)
19.4 (1.2)
83.5 (249.6)
54.2 (161.9)
161.6 (47.4)
Heat Rejection, kBTU/H (kW)
1. The net capacity data has fan motor heat factored in for all ratings.
2. Capacity data is factory-certified to be within 5% tolerance.
3. Data rated with standard filter.
98.5 (28.9)
80°F DB, 62.8°F WB (26.7°C DB, 17.1°C WB) 37% RH
Flow Rate, GPM (l/s)
80°F DB, 66.5°F WB (26.7°C DB, 19.2°C WB) 50% RH
Pressure Drop, ft. water (kPa)
Liebert® CRV™ System Design Manual
28
System Data
Table 3-12 Performance data—Water-cooled CR019RW, 300 mm (12 in.)
Return Air Temperature
83°F (28.33°C) EWT
95°F (35°C) LWT
85°F (29.4°C) EWT
105°F DB, 70.5°F WB (40.6°C DB, 21.4 °C WB) 17% RH
Total, kBTU/H (kW)
90.2 (26.4)
89.7 (26.3)
Sensible, kBTU/H (kW)
90.2 (26.4)
89.7 (26.3)
Flow Rate, GPM (l/s)
18.0 (1.1)
18.0 (1.1)
Pressure Drop, ft water (kPa)
41.2 (123.2)
41.2 (123.2)
Heat Rejection, kBTU/H (kW)
109.6 (28.3)
109.4 (32.1)
100°F DB, 69.1°F WB (37.8°C DB, 20.6°C WB) 20% RH
Total, kBTU/H (kW)
86.4 (25.3)
85.8 (25.2)
Sensible, kBTU/H (kW)
86.4 (25.3)
85.8 (25.2)
Flow Rate, GPM (l/s)
17.6 (1.1)
17.6 (1.1)
Pressure Drop, ft water (kPa)
39.7 (118.7)
39.5 (118.7)
Heat Rejection, kBTU/H (kW)
105.6 (30.9)
105.4 (30.9)
95°F DB, 67.4°F WB (35°C DB, 19.7°C WB) 23% RH
Total, kBTU/H (kW)
83.2 (24.4)
82.5 (24.2)
Sensible, kBTU/H (kW)
81.8 (24.0)
81.4 (23.9)
Flow Rate, GPM (l/s)
17.1 (1.1)
17.1 (1.1)
Pressure Drop, ft water (kPa)
37.4 (111.7)
37.4 (111.7)
Heat Rejection, kBTU/H (kW)
102.2 (30)
101.9 (29.9)
90°F DB, 65.9°F WB (32.2°C DB, 18.8°C WB) 27% RH
Total, kBTU/H (kW)
Sensible, kBTU/H (kW)
80.8 (23.7)
80 (23.5)
76 (22.3)
75.7 (22.2)
Flow Rate, GPM (l/s)
16.6 (1.05)
16.6 (1.05)
Pressure Drop, ft water (kPa)
35.3 (105.6)
35.3 (105.6)
Heat Rejection, kBTU/H (kW)
99.7 (29.2)
99.4 (29.1)
85°F DB, 64.5°F WB (29.4°C DB, 18.05°C WB) 31% RH
Total, kBTU/H (kW)
78.1 (22.9)
77.4 (22.7)
Sensible, kBTU/H (kW)
70.5 (20.7)
70.2 (20.6)
Flow Rate, GPM (l/s)
16.2 (1.03)
16.2 (1.03)
Pressure Drop, ft water (kPa)
33.7 (100.8)
33.7 (100.8)
Heat Rejection, kBTU/H (kW)
97 (28.4)
96.7 (28.3)
80°F DB, 62.5°F WB (26.6°C DB, 16.94°C WB) 37% RH
Total, kBTU/H (kW)
76.1 (22.3)
75.4 (22.1)
Sensible, kBTU/H (kW)
64.1 (18.8)
63.8 (18.7)
Flow Rate, GPM (l/s)
15.9 (1.0)
15.9 (1.0)
Pressure Drop, ft water (kPa)
32.5 (97.3)
32.5 (97.3)
Heat Rejection, kBTU/H (kW)
94.8 (27.8)
94.6 (27.7)
80°F DB, 66.6°F WB (26.6°C DB, 19.2°C WB) 50% RH
Total, kBTU/H (kW)
81.8 (24)
81.1 (23.8)
Sensible, kBTU/H (kW)
55.5 (16.3)
55.2 (16.2)
Flow Rate, GPM (l/s)
16.9 (1.07)
16.9 (1.07)
Pressure Drop, ft water (kPa)
36.5 (109.2)
36.5 (109.2)
Heat Rejection, kBTU/H (kW)
100.8 (29.5)
100.4 (29.4)
1. The net capacity data has fan motor heat factored in for all ratings.
2. Capacity data is factory-certified to be within 5% tolerance.
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Liebert® CRV™ System Design Manual
System Data
Table 3-13 Performance data—Glycol-cooled, 300 mm (12 in.)
Return Air Temperature
Glycol (40% Propylene)
104°F (40°C) EGT; 115°F (46.1°C) LGT
105°F DB, 70.9°F WB (40.6°C DB, 21.6°C WB) 17% RH
Total, kBTU/H (kW)
83.3 (24.4)
Sensible, kBTU/H (kW)
83.3 (24.4)
Flow Rate, GPM (l/s)
21.0 (1.32)
Pressure Drop, ft water (kPa)
63.2 (189.0)
Heat Rejection, kBTU/H (kW)
107.5 (31.5)
100°F DB, 69.1°F WB (37.8°C DB, 20.6°C WB) 20% RH
Total, kBTU/H (kW)
83.3 (24.4)
Sensible, kBTU/H (kW)
83.3 (24.4)
Flow Rate, GPM (l/s)
21.1 (1.33)
Pressure Drop, ft water (kPa)
64.0 (191.2)
Heat Rejection, kBTU/H (kW)
107.5 (31.5)
95°F DB, 67.4°F WB (35°C DB, 19.6°C WB) 23% RH
Total, kBTU/H (kW)
76.0 (22.3)
Sensible, kBTU/H (kW)
76.0 (22.3)
Flow Rate, GPM (l/s)
19.6 (1.24)
Pressure Drop, ft water (kPa)
55.5 (165.9)
Heat Rejection, kBTU/H (kW)
99.8 (29.3)
90°F DB, 66.9°F WB (32.2°C DB, 19.3°C WB) 27% RH
Total, kBTU/H (kW)
72.7 (21.3)
Sensible, kBTU/H (kW)
71.9 (21.1)
Flow Rate, GPM (l/s)
19.0 (1.2)
Pressure Drop, ft water (kPa)
52.2 (156.0)
Heat Rejection, kBTU/H (kW)
96.4 (28.2)
85°F DB, 64°F WB (29.4°C DB, 17.7°C WB) 31% RH
Total, kBTU/H (kW)
70.1 (20.5)
Sensible, kBTU/H (kW)
66.7 (19.6)
Flow Rate, GPM (l/s)
18.4 (1.16)
Pressure Drop, ft water (kPa)
48.9 (146.3)
Heat Rejection, kBTU/H (kW)
93.6 (27.4)
80°F DB, 62.5°F WB (26.6°C DB, 16.94°C WB) 37% RH
Total, kBTU/H (kW)
68.2 (20.0)
Sensible, kBTU/H (kW)
60.4 (17.7)
Flow Rate, GPM (l/s)
18.0 (1.14)
Pressure Drop, ft water (kPa)
47.1 (140.6)
Heat Rejection, kBTU/H (kW)
91.6 (26.9)
80°F DB, 66.6°F WB (26.66°C DB, 19.2°C WB) 50% RH
Total, kBTU/H (kW)
73.3 (21.5)
Sensible, kBTU/H (kW)
51.9 (15.2)
Flow Rate, GPM (l/s)
19.0 (1.2)
Pressure Drop, ft water (kPa)
52.2 (156.0)
Heat Rejection, kBTU/H (kW)
97.0 (28.4)
1. The net capacity data has fan motor heat factored in for all ratings.
2. Capacity data is factory-certified to be within 5% tolerance.
Liebert® CRV™ System Design Manual
30
System Data
Table 3-14 Physical data—Water/Glycol-cooled, 600 mm (24 in.)
Parameter
CR020RW
Fan Data
CR035RW
2454 (4170)
3260 (5540)
Total Airflow, CFM (m3/h)
2454 (4170)
3260 (5540)
Total Fan Motor, hp (kW)
0.8 (0.6)
1.4 (1.06)
Number of Fans
2
Evaporator Coil
Face Area, ft2 (m2)
7.26 (0.674)
Rows
Face Velocity, FPM (m/s)
4
5
339 (1.72)
449 (2.28)
Electric Reheat Single Stage
Capacity, BTU/H (kW)
460 V: 20,472 (6.0) 208 V: 16,719 (4.9)
Steam Generating Humidifier
Capacity, lb/hr (kg/hr)
5 (2.3)
Capacity, kW
1.79
Condensate Pump - Dual Float Type
Capacity, GPM (l/m)
6 (22.7)
Filter Section - Disposable Type
MERV 8 - Standard Pleated Filter
Number
2
Nominal Size, in (mm)
31-1/2 x 17-1/2 x 4 (800 x 445 x 100)
Effective Surface Area - ft2 (m2)
16.4 (1.52)
MERV 11 - Optional Pleated Filter
Quantity
2
Nominal Size, in (mm)
31-1/2 x 17-1/2 x 4 (800 x 445 x 100)
Effective Surface Area - ft2 (m2)
16.4 (1.52)
Table 3-15 Physical data—Water/Glycol-cooled, 300 mm (12 in.)
Parameter
19kW Model
Fan Data
Total Airflow, CFM (m3/h)
2250 (3823)
Total Fan Motor, hp (kW)
0.65 (0.48)
Number of Fans
5
Evaporator Coil
Face Area, ft2 (m2)
6.46 (0.60)
Rows
3
Face Velocity, FPM (m/s)
348 (1.77)
Condensate Pump - Dual Float Type
Capacity, GPM (l/m) Condensate pump is rated for approximately 4.6 GPH
at 17 feet (.28 l/m at 5.18 m) total head. Maximum
coil condensate design flow rate is 4.6 GPH.
Filter Section—MERV 1, Washable Type
Quantity
2
Nominal Size, in (mm)
35.5 x 10.6 x 0.4 (902 x 269 x 10)
Effective Surface Area, ft (m )
2
2.3 (0.21)
2
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Liebert® CRV™ System Design Manual
System Data
3.2.2
Operating Limits—Water/Glycol Systems
Table 3-16 Operating limits—Water/Glycol Systems
Maximum
Water Pressure
psi (kPa)
Maximum
Close-Off
Pressure
psi (kPa)
CR020RW
CR019RW
230 (1586)
43.5 (300)
CR035RW
230 (1586)
43.5 (300)
Models
3.2.3
Minimum Entering
Water Temperature, °F (°C)
Design Condition
45 (7.2)
Sound Data—Water/Glycol Systems
Tables 3-17 and 3-18 show the sound-pressure level in free field at 5 ft. (1.5 m) high and 6-1/2 ft. (2 m) in
front of the air conditioner, with compressor and fan in operation. The sound data is without the Low Sound
Package compressor jacket and sound-deadening panel insulation installed.
Sound power is an absolute measurement that can be used for comparisons when all sound measurement
parameters match exactly.
Table 3-17 Sound data—Water/Glycol CR020RW and CR035RW, 600 mm (24 in.)
2 Fans with Filter
Sound Power Level (PWL)
Airflow
Fan
Speed %
Sound Pressure
Level (SPL)
Octave Band Frequency (Hz)
SCFM m3/h
31.5
dB
63
dB
125
dB
250
dB
71
500
dB
1000 2000 4000 8000
dB
dB
dB
dB
100
2454
4170 73.8 69.4
77.3 75.9
74.2
75
2166
3680 71.2 66.8 68.4 74.7 73.3
50
1780
3025 67.6 63.2 64.8 71.1 69.7
A-Scale
Weighted
dB (A)
Suction Side
2m distance,
free field conditions
(2m, f.f, dBA)
79.6
69.2
73.5
68.2
59.2
71.6
70.9
65.6
56.6
77
66.9
68
67.3
62
53
73.4
63.9
Level PWL sound power level
Table 3-18 Sound data—Water/Glycol CR019RA, 300 mm (12 in.)
5 Fans With Filter
Sound Power Level (PWL)
Airflow
Sound Pressure Level (SPL)
Discharge Side
Suction Side
2m Distance,
2m Distance,
1.5m Above Ground 1.5m Above Ground
A-Scale
Free Field
Free Field
500 1000 2000 4000 8000 Weighted Inlet Outlet
Conditions
Conditions
dB dB dB dB dB
(2m, f.f, dBA)
(2m, f.f, dBA)
dB (A) dB (A) dB (A)
Octave Band Frequency (Hz)
Fan
31.5
Speed
SCFM m³/h dB
%
63
dB
125
dB
250
dB
100
2610 4435
—
—
72.2 82.3 81.5 81.2 78.1 70.2 64.7
85.4
76.7
75
2250 3823
—
—
69.7
50
1615 2744
—
—
79.1 77.4 73.9 65.9 62.3
81.6
71.1 66.1 67.2 65.1 59.5 55.2 51.8
69.4
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Liebert® CRV™ System Design Manual
32
82.6
65.7
71.6
72.7
79.9
61.8
68.9
62
70.2
51
59.2
System Data
3.3 Chilled-water Systems
3.3.1
Capacity and Physical Data—Chilled-water Systems
Table 3-19 Performance Data—Chilled-water CR040RC, 600 mm (24 in.)
45°F (7.2°C) EWT
10°F (5.6°C) Water Rise
50°F (10°C) EWT
10°F (5.6°C) Water Rise
192.1 (56.3)
163.9 (48)
Sensible BTU/H (kW)
177 (51.9)
163.5 (47.9)
Flow Rate, GPM (l/s)
39.1 (2.5)
33.6 (2.1)
55.2 (164.8)
41 (122.5)
Total kBTU/H (kW)
176.4 (51.7)
148.5 (43.5)
Sensible BTU/H (kW)
161.9 (47.4)
148.3 (43.5)
Return Air Temperature
105ºF DB, 71ºF WB (40.6ºC DB, 21.6ºC WB) 17% RH
Total kBTU/H (kW)
Pressure Drop, ft. H2O (kPa)
100ºF DB, 69.5ºF WB (37.8ºC DB, 20.8ºC WB) 20% RH
Flow Rate, GPM (l/s)
Pressure Drop, ft. H2O (kPa)
36 (2.3)
30.5 (1.9)
47.4 (141.6)
34.4 (102.7)
95ºF DB, 67.9ºF WB (35ºC DB, 19.9ºC WB) 23% RH
Total kBTU/H (kW)
159.9 (46.9)
132.8 (38.9)
Sensible BTU/H (kW)
146.4 (42.9)
132.8 (38.9)
Flow Rate, GPM (l/s)
32.7 (2.1)
27.3 (1.7)
39.8 (118.9)
28.2 (84.3)
Total kBTU/H (kW)
142.6 (41.8)
116.9 (34.3)
Sensible BTU/H (kW)
130.8 (38.3)
116.9 (34.3)
Flow Rate, GPM (l/s)
29.3 (1.8)
24.2 (1.5)
Pressure Drop, ft. H2O (kPa)
32.5 (97)
22.5 (67.4)
Pressure Drop, ft. H2O (kPa)
90ºF DB, 66.2ºF WB (32.2ºC DB, 19.0ºC WB) 27% RH
85ºF DB, 64.5ºF WB (29.4ºC DB, 18.1ºC WB) 31% RH
Total kBTU/H (kW)
125.4 (36.7)
100.7 (29.5)
Sensible BTU/H (kW)
114.7 (33.6)
100.7 (29.5)
Flow Rate, GPM (l/s)
25.8 (1.6)
20.9 (1.3)
Pressure Drop, ft. H2O (kPa)
25.9 (77.3)
17.4 (51.9)
Total kBTU/H (kW)
108.2 (31.7)
83.9 (24.6)
Sensible BTU/H (kW)
98.2 (28.8)
83.9 (24.6)
Flow Rate, GPM (l/s)
22.4 (1.4)
17.6 (1.1)
Pressure Drop, ft. H2O (kPa)
20 (59.8)
12.7 (37.9)
80ºF DB, 62.8ºF WB (26.7ºC DB, 17.1ºC WB) 37% RH
The net capacity data has fan motor heat factored in for all ratings.
Capacity data is factory-certified to be within 5% tolerance.
Data rated with standard filter.
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Liebert® CRV™ System Design Manual
System Data
Table 3-20 Performance Data—Chilled-water CR032RC1, 300 mm (12 in.)
Return Air Temperature
45°F (7.2°C) EWT
10°F (5.6°C)
Water Rise
50°F (10°C) EWT
10°F (5.6°C)
Water Rise
95°F DB, 67.9°F WB (35°C DB, 19.9°C WB) 23% RH
Total kBTU/H (kW)
100.9 (29.6)
88.7 (26)
Sensible kBTU/H (kW)
97.7 (28.6)
86.0 (25.2)
Flow Rate, GPM (l/s)
18.8 (1.2)
18.2 (1.1)
Pressure Drop, ft H2O (kPa)
27.9 (83.3)
26 (77.6)
90°F DB, 66.2°F WB (32.2°C DB, 19.0°C WB) 27% RH
Total BTU/H (kW)
89.1 (26.1)
Sensible BTU/H (kW)
85.9 (25.2)
71.6 (21)
Flow Rate, GPM (l/s)
18 (1.1)
13.9 (0.9)
25.2 (75.3)
15.4 (45.9)
Pressure Drop, ft H2O (kPa)
72.3 (21.2)
85°F DB, 64.5°F WB (29.4°C DB, 18.1°C WB) 31% RH
Total BTU/H (kW)
75.7 (22.2)
61.6 (18)
Sensible BTU/H (kW)
73.6 (21.6)
58.9 (17.3)
Flow Rate, GPM (l/s)
15.4 (1)
11.4 (0.7)
18.4 (55.1)
9.8 (29.3)
Pressure Drop, ft H2O (kPa)
80°F DB, 62.8°F WB (26.7°C DB, 17.1°C WB) 37% RH
Total BTU/H (kW)
63.0 (18.5)
50.0 (14.6)
Sensible BTU/H (kW)
61.6 (18.1)
48.5 (14.2)
Flow Rate, GPM (l/s)
11.9 (0.8)
10.3 (0.7)
Pressure Drop, ft H2O (kPa)
4.3 (12.8)
8.2 (24.4)
Liebert® CRV™ System Design Manual
34
System Data
Table 3-21 Physical data—Chilled-water, 600 mm (24 in.)
Parameter
40kW Models
Fan Data
Total Airflow, CFM (m3/h)
3325 (5650)
Total Fan Motor, hp (kW)
1.7 (1.26)
Number of Fans
2
Evaporator Coil
Face Area, ft2 (m2)
Rows
Face Velocity, FPM (m/s)
7.26 (0.674)
6
459.0 (2.33)
Electric Reheat Single Stage
Capacity, BTU/H (kW) 460 V: 20,472 (6.0) 208 V: 16,719 (4.9)
Steam Generating Humidifier
Capacity, lb/hr (kg/hr)
Capacity, kW
5.0 (2.3)
1.79
Condensate Pump - Dual Float Type
Capacity, GPM (l/m)
6.0 (22.7)
Filter Section - Disposable Type;
MERV 8 - Standard Pleated Filter
Quantity
Nominal Size, in (mm)
Effective Surface Area -
ft2
(m2)
2
31-1/2 x 17-1/2 x 4 (800 x 445 x 100)
16.4 (1.52)
MERV 11 - Optional Pleated Filter
Quantity
Nominal Size, in (mm)
Effective Surface Area - ft2 (m2)
2
31-1/2 x 17-1/2 x 4 (800 x 445 x 100)
16.4 (1.52)
Motorized Ball Valve
Maximum Allowable Pressure, psi (kPA)
325 (2241)
Maximum Close-Off Pressure, psi (kPA)
200 (1379)
Maximum Differential Pressure
(Full Flow), psi (kPa)
35
50 (345)
Liebert® CRV™ System Design Manual
System Data
Table 3-22 Physical data—Chilled-water, 300mm (12 in.)
Parameter
CR032RC1
Fan Data
Total Airflow, CFM(m3/h)
2550 (4332)
Total Fan Motor hp (kW)
1.3 (0.98)
Number of Fans
6
Evaporator
Face Area, ft2 (m2)
7.75 (0.72)
Rows
3
Face Velocity
329 (1.67)
Condensate Pump-Dual Float:
Capacity, GPM (l/m) Condensate pump is rated for approximately 4.6 GPH
at 17 feet (.28 l/m at 5.18 m) total head. Maximum coil
condensate design flow rate is 4.6 GPH.
Filter Section
Washable MERV1
Quantity
2
Nominal Size, in (mm)
36 X 10 X0.4 (914 X 254 X 10)
Effective Surface Area, ft2 (m2)
2.4 (0.22)
2" MERV8
Quantity
2
Nominal Size, in (mm)
36 X 10 X2 (914 X 254 X 51)
Effective Surface Area, ft2 (m2)
5.8 (0.54)
Motorized Ball Valve
Maximum Allowable Pressure, PSI (kPa)
325 (2241)
Maximum Close-off Pressure, PSI (kPa)
200 (1379)
Maximum Differential Pressure (Full Flow),
PSI (kPa)
3.3.2
50 (345)
Operating Limits—Chilled-water systems
Table 3-23 Operating limits—Chilled-water systems
Models
CR040RC
CR032
Maximum Water
Pressure, psi (kPa)
Maximum Close-Off
Pressure, psi (kPa)
325 (2241)
200 (1379)
Liebert® CRV™ System Design Manual
36
Minimum Entering
Water Temperature, °F (°C)
Design Condition
40 (4.4)
System Data
3.3.3
Sound Data—Chilled-water Systems
Tables 3-24 and 3-25 show the sound pressure level in free field at 5ft. (1.5 m) high and 6-1/2ft. (2 m) in
front of the air conditioner, with compressor and fan in operation. The sound data is without the Low Sound
Package compressor jacket and sound deadening panel insulation installed.
Sound power is an absolute measurement that can be used for comparisons. Sound pressure values can
be used for comparisons only when all sound measurement parameters match exactly.
Table 3-24 Sound data—Chilled-water CR040RW, 600 mm (24 in.)
2 Fans with Filter
Airflow
Fan
Speed %
Sound Pressure
Level (SPL)
Sound Power Level (PWL)
Octave Band Frequency (Hz)
SCFM m3/h
31.5
dB
63
dB
125
dB
250
dB
500
dB
100
3325
5650 86.4 78.1 82.4 84.6 79.2
75
2708
4600 80.8 72.5 76.8
50
1972
1000 2000 4000 8000
dB
dB
dB
dB
A-Scale
Weighted
dB (A)
At Suction
side, 2m distance,
free field conditions
(2m, f.f, dBA)
75
76.4
70.9
63.8
82.8
71.6
73.6
69.4
70.8
65.3
58.2
77.2
66.0
3350 75.1 66.8 71.1 73.3 67.9
63.7
65.1
59.6
52.5
71.5
60.3
79
Level PWL sound power level
Table 3-25 Sound data—Chilled-water CR032RC, 300 mm (12 in.)
6 Fans With Filter
Sound Power Level (PWL)
Airflow
Sound Pressure Level (SPL)
Octave Band Frequency (Hz)
Fan
31.5
Speed % SCFM m3/h dB
63
dB
125
dB
250
dB
At Suction Side,
2 m distance,
1.5m
above ground,
A-Scale
free field
500 1000 2000 4000 8000 Weighted Inlet Outlet
conditions
(2m, f.f, dBA)
dB(A) dB(A) dB(A)
dB dB dB dB dB
At Discharge
side,
2m distance,
1.5m
above ground,
free field
conditions
(2m, f.f, dBA)
100
3100 5268
—
—
73.0 83.1 82.2 82.0 78.9 71.0 65.5
86.2
77.5
83.4
66.5
72.4
75
2500 4248
—
—
70.5 79.8 79.9 78.2 74.7 66.7 63.1
82.4
73.5
80.7
62.5
69.7
50
1650 2804
—
—
71.9 66.8 68.0 65.8 60.3 56.0 52.6
70.2
62.8
71.0
51.8
60.0
37
Liebert® CRV™ System Design Manual
System Data
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Liebert® CRV™ System Design Manual
38
Electrical Data
4.0 Electrical Data
NOTICE
Risk of exceeding line-to-ground limit. Can cause equipment damage.
• The electrically commutated (EC) motors included in 480-V CR035 and CR040 units are
suitable for connection to power supplies with 300V or less line to ground potential. Excess lineto-ground voltage can cause capacitor failure internal to the motors.
• Power supplies such as 480-V wye with solidly grounded neutral have 277 V line to ground and
are acceptable.
• Power supplies such as 480-V wye with high-resistance (or impedance) ground, 480-V delta
without ground or with floating ground, 480-V delta with corner ground or 480-V delta with
grounded center tap will exceed the 300V line-to-ground limit.
4.1 Air-cooled Systems Electrical Data
Table 4-1
Electrical data—Air-cooled, 600 mm (24 in.)
CR035RA
Voltage
460/3/60
CR020RA
208/3/60
460/3/60
208/3/60
Dehumidification, With or Without Humidifier, Reheat, Condensate Pump
FLA
32.2
62.0
24.2
50.8
WSA
39.1
75.4
29.2
61.4
OPD
50
100
35
80
Dehumidification and Humidifier; NO Reheat, Condensate Pump
FLA
28.4
53.8
20.4
42.6
WSA
33.4
63.1
23.5
49.1
OPD
50
100
35
70
Dehumidification and Condensate Pump; NO Reheat, NO Humidifier
FLA
24.7
45.4
16.7
34.2
WSA
29.7
54.7
19.8
40.7
OPD
45
90
30
60
Dehumidification and Reheat; NO Humidifier, NO Condensate Pump
FLA
31.0
59.7
23.0
48.5
WSA
37.9
73.1
28.0
59.1
OPD
50
100
35
80
Dehumidification; NO Humidifier, NO Reheat, NO Condensate Pump
FLA
23.5
43.1
15.5
31.9
WSA
28.5
52.4
18.6
38.4
OPD
45
80
30
60
Table 4-2
Electrical data—Air-cooled CR019, 300 mm (12 in.)
Voltage
FLA
WSA
OPD
208-230 V/3Ph/60 Hz
33.4
39.9
60
460 V/3Ph/60 Hz (Wye Connected)
16.8
20
30
208-230 V/3Ph/60 Hz
32.5
39
60
460 V/3Ph/60 Hz (Wye Connected)
16.3
19.4
30
With Condensate Pump
Without Condensate Pump
39
Liebert® CRV™ System Design Manual
Electrical Data
4.2 Water/Glycol Systems Electrical Data
Electrical data—Water/Glycol, 600 mm (24 in.)
Table 4-3
CR035RW
Voltage
460/3/60
CR020RW
208/3/60
460/3/60
208/3/60
Dehumidification, With or Without Humidifier, Reheat, Condensate Pump
FLA
32.2
62.0
24.2
50.8
WSA
39.1
75.4
29.2
61.4
OPD
50
100
35
80
Dehumidification, Humidifier and Condensate Pump; NO Reheat
FLA
28.4
53.8
20.4
42.6
WSA
33.4
63.1
23.5
49.1
OPD
50
100
35
70
Dehumidification and Condensate Pump; NO Reheat, NO Humidifier
FLA
24.7
45.4
16.7
34.2
WSA
29.7
54.7
19.8
40.7
OPD
45
90
30
60
Dehumidification and Reheat; NO Condensate Pump, NO Humidifier
FLA
31.0
59.7
23.0
48.5
WSA
37.9
73.1
28.0
59.1
OPD
50
100
35
80
Dehumidification; NO Reheat, NO Humidifier, NO Condensate Pump
FLA
23.5
43.1
15.5
31.9
WSA
28.5
52.4
18.6
38.4
OPD
45
80
30
60
FLA = Full Load Amps; WSA = Wire Size Amps; OPD = Maximum Overcurrent Protection Device
Table 4-4
Electrical data—Air-cooled & Water/Glycol CR019, 300 mm (12 in.)
Voltage
FLA
WSA
OPD
208-230 V/3Ph/60 Hz
33.4
39.9
60
460 V/3Ph/60 Hz (Wye Connected)
16.8
20
30
208-230 V/3Ph/60 Hz
32.5
39
60
460 V/3Ph/60 Hz (Wye Connected)
16.3
19.4
30
With Condensate Pump
Without Condensate Pump
FLA = Full Load Amps; WSA = Wire Size Amps; OPD = Maximum Overcurrent Protection Device
Liebert® CRV™ System Design Manual
40
Electrical Data
4.3 Chilled-water Systems Electrical Data
Table 4-5
Electrical data—Chilled-water, 600 mm (24 in.)
CR040RC
Voltage
460/3/60
208/3/60
Dehumidification, With or Without Humidifier, Reheat, Condensate Pump
FLA
12.2
24.9
WSA
15.3
31.1
OPD
20
35
Dehumidification, Condensate Pump and Humidifier; NO Reheat
FLA
8.4
16.7
WSA
10.5
20.9
OPD
15
25
Dehumidification and Condensate Pump; NO Reheat, NO Humidifier
FLA
4.7
8.3
WSA
5.1
9.1
OPD
15
15
Dehumidification and Reheat; NO Condensate Pump, NO Humidifier
FLA
11.0
22.6
WSA
13.8
28.3
OPD
15
30
Dehumidification; NO Condensate Pump, NO Reheat, NO Humidifier
Table 4-6
FLA
3.5
6.0
WSA
3.9
6.8
OPD
15
15
Electrical data—Chilled water, 300 mm (12 in.)
Voltage
FLA
WSA
OPD
With Condensate Pump
120 V/1Ph/60 Hz
14.6
15.2
20
208-230 V/1Ph/60 Hz
12.3
12.8
15
208-230 V/3Ph/60 Hz
7.5
8.3
15
460 V/3Ph/60 Hz (Wye Connected)
4.3
4.8
15
Without Condensate Pump
120 V/1Ph/60 Hz
13.2
13.8
15
208-230 V/1Ph/60 Hz
11.4
11.9
15
208-230 V/3Ph/60 Hz
6.6
7.4
15
460 V/3Ph/60 Hz (Wye Connected)
3.8
4.3
15
41
Liebert® CRV™ System Design Manual
Electrical Data
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Liebert® CRV™ System Design Manual
42
Dimensions and Weights
5.0 Dimensions and Weights
5.1 Planning Dimensions
Figure 5-1 Cabinet and floor-planning dimensions—600 mm (24 in.)
ACCESS REQUIRED TO SERVICE THE LIEBERT CRV UNIT WITHIN THE ROW
REAR SERVICE AREA IS S+B OR S+A WHEN B IS NOT AVAILABLE
25 9/16"
903 5/16"
650mm
22944mm
A
13 3/4"
350mm
25 9/16"
650mm
B
REAR
78 3/4"
2000mm
NOMINAL
S
100"
2540mm
Door Fully
Open 12"
(305mm)
107 5/16"
2725mm
FRONT
46 1/4"
1175mm
TOP VIEW
3"
76mm
23 5/8"
600mm
46 1/4"
1175mm
FOR PROPER AIRFLOW DISTRIBUTION:
ALIGN THE FRONT DOOR OF NEIGHBORING
SERVER RACKS WITH THE FRONT CORNER
OF THE LIEBERT CRV.
21 5/8"
550mm
S
3 15/16"
100mm
23 5/8"
600mm
27 9/16"
700mm
ACCESS REQUIRED FOR INSTALLATION OF
THE LIEBERT CRV UNIT WITHIN THE ROW.
AIR FILTERS
T
HO
AIR
LD
CO
LL
TA
INS
49"
1245mm
AIR
LL
TA
INS
49"
1245mm
REAR VIEW
FRONT OR REAR CLEARANCE REQUIRED.
DPN001791
Rev. 4
Dry Weight ±5%, lbs (kg)
Model
CR020R
CR035R
CR040R
Source: DPN001791 Rev. 4
Air-cooled
Water/Glycol-cooled
739 (335)
805 (365)
—
772 (350)
849 (385)
—
43
Chilled-water cooled
—
728 (330)
Liebert® CRV™ System Design Manual
Dimensions and Weights
Figure 5-2 Cabinet and floor-planning dimensions—300 mm (12 in.)
A
ACCESS REQUIRED TO SERVICE THE UNIT
BETWEEN EXISTING RACKS WITHIN THE ROW
IR
TA
HO
HEIGHT OF THE UNIT
FROM THE TOP OF UNIT
TO THE FLOOR
36"
914mm
AIR
LD
CO
REAR SIDE
(Liftoff door)
Front of Unit
DEPTH
TOP VIEW
11 13/16"
300mm
ACCESS REQUIRED TO INSTALL THE UNIT
BETWEEN EXISTING RACKS WITHIN THE ROW.
FRONT SIDE
with Display
36"
914mm
ONLY Front or Rear
clearance required
Install
Depth
Front of Unit
12"
305mm
24"
610mm
Install
Depth
DPN002807
Rev. 5
300 mm (12 in.)
Cooling System
Height
in. (mm)
Depth
in. (mm)
Install Depth
in (mm)
Air-cooled
Water/Glycol
Dry Weight ±5%
lbs (kg)
507 (230)
78-3/4 (2000)
43-5/16 (1100)
49-3/16 (1250)
Chilled Water
418 (190)
All dimensions are mm Primary and (in) Secondary unless otherwise noted.
Source: DPN002807 Rev. 5
Liebert® CRV™ System Design Manual
545 (247)
44
Dimensions and Weights
5.2 Piping Connections—Air-Cooled Systems
Figure 5-3 Piping connections—Air-cooled, 600 mm (24 in.), digital scroll with EC fans.
PIPING AND ELECTRICAL CONNECTIONS AVAILABLE AT
THE TOP AND BOTTOM OF UNIT.
ATTENTION:
AIR COOLED SYSTEMS MAY REQUIRE
ADDITIONAL OIL TO BE ADDED INTHE FIELD
IN ORDER TO ALLOW FOR SUFFICIENT
COMPRESSOR LUBRICATION. PLEASE SEE THE
USER MANUAL FOR DETAILS.
UNSOLDER WHEN
CONNECTING
THROUGH BOTTOM
REAR
TOP CONNECTIONS
3 1/4"
83mm
17 5/16"
440mm
9 1/2"
242mm
3 1/16"
77mm
RG
HS
CP
RL
12 3/4"
324mm
8 7/8"
226mm
A
1 1/8"
28mm
2 15/16"
74mm
RG
1 3/4"
44mm
9 5/16"
237mm
RL
2 11/16"
69mm
2 11/16"
69mm
DETAIL A
9 3/4"
248mm
23 5/8"
600mm
GDH or HS
5 1/8"
130mm
2 11/16"
69mm
2 15/16"
74mm
46 1/4"
1175mm
3"
76mm
1 3/4"
45mm
1 3/4"
45mm
HVT
LVT
3 3/4"
94mm
1 1/2"
38mm
3 7/8"
98mm
LVT
5"
127mm
2 3/16"
56mm
2 1/8"
54mm
4 13/16"
122mm
HVB
GD or CP
2 1/8"
55mm
LVB2
LVB
5 3/8"
136mm
5 7/16"
138mm
2 3/16"
56mm
3 1/4"
83mm
BOTTOM CONNECTIONS
(possible with raised floor)
DPN001792
Rev. 4
Unit Connections
RL
RG
GD
GDH
CP
Refrigerant Liquid Line Inlet
Refrigerant Gas Line Outlet
Gravity Coil Pan Drain
Gravity Humidifier Drain
Condensate Pump
HS
Humidifier Supply
HVT
High-Voltage Top Connection
High-Voltage Bottom Entrance
(feed through the base of the unit)
LVT
Low-Voltage Top Connection
Low-Voltage Bottom Entrance
LVB
(feed through the base of the unit)
Low-Voltage Bottom Entrance
LVB2
(feed through the base of the unit)
Source DPN001792, Rev. 4
HVB
CR20A-50 Hz
CR35A-50 Hz
CR20A-60 Hz
CR35A-60 Hz
12 mm O.D. Cu Sweat 16 mmO.D. Cu Sweat 1/2” O.D. Cu Sweat
5/8” O.D. Cu Sweat
16 mm O.D. Cu Sweat 22 mm” O.D. Cu Sweat 5/8” O.D. Cu Sweat
7/8” O.D. Cu Sweat
20 mm I.D.
1" MPT
22 mm I.D.
N/A
1/2” Gas F
1/2” FPT
1/2” Gas F (Top Connection),
1/2” FPT (Top Connection),
3/4” Gas Bottom Connection)
1/4” Compression Fitting (Bottom Connection)
Combination Knockout Hole Diameter 35 mm Combination Knockout Hole Diameter 1-3/8”
(35 mm),
(1-3/8”),
1-3/4” (44.5 mm) and 2-1/2” (63.5 mm)
44.5 mm (1-3/4”) and 63.5 mm (2-1/2”)
1 Hole, Diameter, Diameter 63.5 mm (2-1/2”)
1 Knockout Hole, Diameter 2-1/2” (63.5 mm)
2 Holes, Diameter, 2, Diameter 7/8” (22 mm)
4 Knockout Holes, Diameter 7/8” (22 mm)
2 Knockout Holes, Diameter 1-3/32” (27.8
mm)
2 Holes, Diameter, 28 mm (1-7/64”)
—
45
1 Hole, Diameter 1-3/4” (44.5 mm)
Liebert® CRV™ System Design Manual
Dimensions and Weights
Figure 5-4 Piping connections—Air-cooled, 300 mm (12 in.)
ATTENTION, AIR COOLED SYSTEMS MAY REQUIRE ADDITIONAL OIL TO BE
ADDED IN THE FIELD IN ORDER TO ALLOW FOR SUFFICIENT COMPRESSOR
LUBRICATION. SEE UNIT USER MANUAL FOR DETAILS.
FRONT OF UNIT
FRONT OF UNIT
11 13/16"
300mm
22 5/16"
567mm
25 1/8"
638mm
19"
483mm
20"
508mm
33 5/16"
846mm
43 1/8"
1095mm
7/8"
22mm
TYP.
2 15/16"
74mm
18 1/8"
460mm
27 13/16"
707mm
2 3/8"
60mm
TDM
10 1/2"
267mm
11 5/8"
295mm
15 9/16"
12 13/16"
395mm
325mm
16 9/16"
14 9/16"
420mm
370mm
37 1/2"
952mm
CPT
RLT
RGT
1 9/16"
39mm
2 1/4"
57mm
2 5/8"
67mm 3"
76mm
3 5/16"
84mm
3 11/16"
94mm
A
39 1/16"
992mm
CUTOUT FOR
RLB, RGB & GD/CPB
RLB
LVT2
HVT
RGB
GD/CPB
LVB1
LVT1
1 9/16"
40mm
2 3/4"
70mm
BOTTOM CONNECTIONS
(possible with raised floor)
LVB2
HVB
TOP CONNECTIONS
DETAIL A
DPN002813
Rev. 7
Top
Connections
CR19, 60 Hz
Dimensions
Description
RLT
Refrigerant Liquid
Line Inlet
1/2” O.D. Cu Sweat
RGT
Refrigerant Gas
Line Outlet
CPT
Bottom
Connections
Description
CR19, 60 Hz
Dimensions
RLB
Refrigerant Liquid
Line Inlet
1/2” O.D. Cu Sweat
5/8” O.D. Cu Sweat
RGB
Refrigerant Gas
Line Outlet
5/8” O.D. Cu Sweat
Condensate Pump
Knockout
1-3/8” (35 mm)
GD
Gravity Coil Pan Drain
Combination Knockout
1-1/8” (29 mm) and
1-3/4” (44 mm)
CPB
Condensate Pump
HVT
High-Voltage Top
Connection
Knockout Hole
Diameter, 1-3/4”
(44 mm)
2 Knockout Holes,
Diameter, 7/8” (22 mm)
HVB
LVT1
Low-Voltage Top
Connection (Twisted
Pair)
High-Voltage Bottom
Entrance (feed through
unit’s base)
Combination Knockout
1-1/8” (29 mm) and
1-3/4” (44 mm)
LVT2
Low-Voltage Top
Connection
(Shielded Cable)
2 Knockout Holes,
Diameter, 7/8” (22 mm)
LVB1
Low-Voltage Bottom
Connection
(Twisted Pair)
2 Knockout Holes,
Diameter, 7/8” (22 mm)
TDM
Tie-Down Mounting
(Top)
4 Holes, Diameter
1/8” (3 mm)
LVB2
Low-Voltage Bottom
Connection
(Shielded Cable)
2 Knockout Holes,
Diameter, 7/8” (22 mm)
Source: DPN002813, Rev. 7
Liebert® CRV™ System Design Manual
46
Dimensions and Weights
5.3 Piping Connections—Water/Glycol Systems
Figure 5-5 Piping connections—Water/Glycol, 600 mm (24 in.)
PIPING AND ELECTRICAL
CONNECTIONS AVAILABLE
AT THE TOP AND BOTTOM
OF UNIT.
6 1/8"
155mm
REAR
TOP CONNECTIONS
3 1/4"
83mm
A
17 5/16"
440mm
9 1/2"
242mm
9 3/4"
248mm
1 1/8"
28mm
8 7/8"
226mm
2 15/16"
74mm
3 1/16"
77mm
CR
HS
REAR
CUTAWAY
4 1/8"
105mm
CP
CR
1 3/4"
44mm
9 5/16"
237mm
2 11/16"
69mm
2 11/16"
69mm
DETAIL A
12 3/4"
324mm
CS
5 1/8"
130mm
GDH or HS
2 11/16"
69mm
CS
77
( 3 1/16")
46 1/4"
1175mm
3 7/8"
98mm
1 3/4"
45mm
3 3/4"
94mm
HVB
LVT
1 3/4"
45mm
HVT
3 7/8"
98mm
1 1/2"
38mm
GD or CP
2 1/8"
55mm
LVB
LVT
LVB2
5"
127mm
2 1/8"
54mm
2 3/16"
56mm
3 1/4"
83mm
Water/Glycol Coolant Supply
Water/Glycol Coolant Return
Gravity Coil Pan Drain
Gravity Humidifier Drain
HS
Humidifier Supply
CP
Condensate Pump
HVT
High-Voltage Top Connection
High-Voltage Bottom Entrance
(feed through the base of the unit)
LVT
Low-Voltage Top Connection
Low-Voltage Bottom Entrance
LVB
(feed through the base of the unit)
Low-Voltage Bottom Entrance
LVB2
(feed through the base of the unit)
Source DPN001793, Rev. 4
HVB
5 7/16"
138mm
2 3/16"
56mm
BOTTOM CONNECTIONS
(possible with raised floor)
23 5/8"
600mm
Unit Connections
CS
CR
GD
GDH
4 13/16"
122mm
5 3/8"
136mm
DPN001793
Rev. 4
CR20W, CR35W, 60 Hz
CR20W, CR35W, 50 Hz
1-1/4” FPT
1-1/4” FPT
1" MPT
—
1/2” FPT (top connection)
1/4” Compression Fitting (bottom connection)
1/2” FPT
Combination Knockout Hole Diameter
1-3/8”, 1-3/4” and 2-1/2”
(35 mm, 44.5 mm, 63.5 mm)
32 mm GAS F
32 mm GAS F
20 mm I.D.
22 mm I.D.
1/2” GAS F (top connection),
3/4” GAS F (bottom connection)
1/2” GAS F
Combination Knockout Hole, Diameter
35 mm, 44.5 mm and 63.5 mm
(1-3/8”, 1-3/4”, 2-1/2”)
Knockout Hole, Diameter, 2-1/2” (63.5 mm)
Knockout Hole, Diameter 63.5 mm (2-1/2”)
4 Knockout Holes, Diameter 7/8” (22 mm)
2 Knockout Holes, Diameter, 22 mm (7/8”)
2 Knockout Holes, Diameter, 1-3/32” (27.8 mm)
2 Knockout Holes, Diameter, 28 mm (1-7/64”)
Knockout Hole, Diameter, 1-3/4” (44.5 mm)
—
47
Liebert® CRV™ System Design Manual
Dimensions and Weights
Figure 5-6 Piping connections—Water/Glycol, 300 mm (12 in.)
PIPING CONNECTION LOCATIONS MUST BE ORDERED TOP OR BOTTOM.
ELECTRICAL CONNECTIONS AVAILABLE TOP OR BOTTOM OF UNIT.
FRONT OF UNIT
FRONT OF UNIT
19"
483mm
11 13/16"
300mm
33 5/16"
846mm
43 1/8"
1095mm
22 5/16"
567mm
25 1/8"
638mm
7/8"
22mm
TYP.
20"
508mm
18 1/8"
460mm
27 13/16"
707mm
2 15/16"
74mm
2 3/8"
60mm
TDM
10 1/2"
267mm
11 5/8"
295mm
15 9/16"
12 13/16"
395mm
325mm
16 9/16"
14 9/16"
420mm
370mm
37 1/2"
952mm
CPT
CST
CRT
A
39 1/16"
992mm
1 9/16"
39mm
2 1/4"
57mm
2 5/8"
67mm 3"
76mm
3 5/16"
84mm
3 11/16"
94mm
CUTOUT FOR
CSB, CRB & GD/CPB
CRB
LVT2
HVT
CSB
GD/CPB
LVB1
LVT1
1 9/16"
40mm
2 3/4"
70mm
BOTTOM CONNECTIONS
(possible with raised floor)
LVB2
HVB
TOP CONNECTIONS
DETAIL A
DPN0003040
Rev. 4
Top Connections
CST
Water/Glycol Coolant Supply
CRT
Water/Glycol Coolant Return
CPT
Condensate Pump
HVT
High-voltage Top Connection
CR019 (60 Hz)
Bottom Connections
1-1/4” FPT
CSB
1-1/4” FPT
CRB
Knockout, 1-3/8” (35 mm) GD
Combination Knockout
1-1/8” and 1-3/4”
(29 mm and 44 mm)
Water/Glycol Coolant Supply
Water/Glycol Coolant Return
Gravity Coil Pan Drain
CR019 (60 Hz)
1-1/4” FPT
1-1/4” FPT
1 Knockout Hole,
Diameter 1-3/4” (44 mm)
CPB
Condensate Pump
HVB
High-Voltage Bottom
Entrance (feed through the
base of the unit)
Combination Knockout
1-1/8” and 1-3/4”
(29 mm and 44 mm)
LVT1
Low-voltage Top Connection
(Twisted Pair)
2 Knockout Holes
Diameter 7/8” (22 mm)
LVT2
Low-Voltage Top Connection
(Shielded Cable)
2 Knockout Holes
Diameter 7/8” (22 mm)
LVB1
Low-Voltage Bottom Connection
(Twisted Pair)
2 Knockout Holes
Diameter, 7/8” (22 mm)
4 Holes, Diameter
1/8” (3 mm)
LVB2
Low-Voltage Bottom Connection
(Shielded Cable)
2 Knockout Holes
Diameter, 7/8” (22 mm)
TDM Tie-Down Mounting (Top)
Source: DPN003040, Rev. 4
Liebert® CRV™ System Design Manual
48
Dimensions and Weights
5.4 Piping Connections—Chilled-water Systems
Figure 5-7 Piping and Electrical connections—Chilled-water, 600 mm (24 in.)
PIPING AND ELECTRICAL
CONNECTIONS AVAILABLE
AT THE TOP AND BOTTOM
OF UNIT.
4 1/8"
104mm
6 1/8"
155mm
REAR
9 3/4"
248mm
A
12 3/4"
324mm
TOP CONNECTIONS
3 1/4"
83mm
9 1/2"
242mm
17 5/16"
440mm
3 1/16"
77mm
CWR
HS
CP
8 7/8"
226mm
2 15/16"
74mm
5 1/8"
130mm
CWS
2 11/16"
69mm
CWS
1 3/4"
44mm
GDH or HS
2 11/16"
69mm
46 1/4"
1175mm
77
( 3 1/16")
1 3/4"
45mm
HVT
LVT
2 1/8"
54mm
2 3/16"
56mm
3 7/8"
98mm
3 3/4"
94mm
LVT
1 3/4"
45mm
3 1/4"
83mm
CWR
9 5/16"
237mm
2 11/16"
69mm
5"
127mm
1 1/8"
28mm
1 1/2"
38mm
4 13/16"
122mm
HVB
GD or CP
LVB2
LVB
3 7/8"
98mm
2 1/8"
55mm
5 7/16"
138mm
2 3/16"
56mm
23 5/8"
600mm
5 3/8"
136mm
BOTTOM CONNECTIONS
(possible with raised floor)
DPN001794
Rev. 4
Unit Connections
CWS
CWR
GD
GDH
Chilled Water Supply
Chilled Water Return
Gravity Coil Pan Drain
Gravity Humidifier Drain
HS
Humidifier Supply
CP
Condensate Pump
HVT
High-Voltage Top Connection
High-Voltage Bottom Entrance
(feed through the base of the unit)
LVT Low-Voltage Top Connection
Low-Voltage Bottom Entrance
LVB
(feed through the base of the unit)
Low-Voltage Bottom Entrance
LVB2
(feed through the base of the unit)
Source DPN001794, Rev. 4
HVB
CR040C (50 Hz)
CR040C (60 Hz)
32 mm Gas F
32 mm Gas F
20 mm I.D.
22 mm I.D.
1/2” Gas F (top connection),
3/4” Gas F (bottom connection)
1/2” Gas F
Combination Knockout Hole Diameter 35 mm
(1-3/8”),
44.5 mm (1-3/4”) and 63.5 mm (2-1/2”)
1-1/4” FPT
1-1/4” FPT
1" MPT
N/A
1/2” FPT (top connection),
1/4” Compression Fitting (bottom connection)
1/2” FPT
Combination Knockout Hole Diameter 1-3/8”
(35 mm),
1-3/4” (44.5 mm) and 2-1/2” (63.5 mm)
Knockout Hole, 1, Diameter 63.5 mm (2-1/2”)
Knockout Hole, 1, Diameter 2-1/2” (63.5 mm)
Knockout Holes, 2, Diameter 22 mm (7/8”)
Knockout Holes, 4, Diameter 7/8” (22 mm)
Knockout Holes, 2, Diameter 1-3/32”
(27.8 mm)
Knockout Hole, 1, Diameter 1-3/4”
(44.5 mm)
Knockout Holes, 2, Diameter 28 mm (1-7/64”)
—
49
Liebert® CRV™ System Design Manual
Dimensions and Weights
Figure 5-8 Piping connections—Chilled-water, 300 mm (12 in.)
PIPING AND ELECTRICAL CONNECTIONS AVAILABLE AT THE TOP AND
BOTTOM OF UNIT.
FRONT OF UNIT
FRONT OF UNIT
24 1/4"
616mm
11 13/16"
300mm
27 5/16" 19"
694mm 483mm
20"
30 9/16" 508mm
7/8"
776mm
22mm
TYP.
22 5/16"
567mm
3 11/16"
94mm
3 3/16"
80mm
3"
27 13/16"
76mm
707mm
39 1/16" 2 5/8"
992mm 67mm
2 5/16"
59mm
37 1/2"
952mm
1 9/16"
39mm
25 1/8"
638mm
33 5/16"
846mm
TDM
43 1/8"
1095mm
25 13/16"
656mm
26 13/16"
681mm
CPT
CWST
CWRT
CBV
9"
229mm
HVT
30 1/8"
766mm
30 7/8"
785mm
32 7/8"
835mm
2 3/8"
60mm
7 13/16"
198mm
HVT2
27 13/16"
706mm
HVB
A
LVT2
LVB1
1 9/16"
40mm
LVT1
LVB2
CWSB
2 3/4"
70mm
GD/CPB
TOP CONNECTIONS
BOTTOM CONNECTIONS
(possible with raised floor)
CWRB
DETAIL A
DPN002815
Rev. 4
Piping & Electrical connection sizes, Chilled-water, 300 mm (12 in.)
Unit Top Connections
CR032 (60 Hz)
Unit Bottom Connections
CR032 (60 Hz)
CWST
Chilled Water Supply
1-1/4” FPT
CWSB
Chilled Water Supply
1-1/4” FPT
CWRT
Chilled Water Return
1-1/4” FPT
CWRB
Chilled Water Return
1-1/4” FPT
CPT
Condensate Pump
Knockout, 3/4” (19 mm)
GD
Gravity Coil Pan Drain
CBV
Coil Bleeder
(Schrader Valve Access)
Rubber Plug
2" (51 mm)
CPB
Condensate Pump
HVT
High-Voltage Top Connection
Combination Knockout
1-1/8” and 1-3/4”
(29 mm and 44 mm)
HVB
High-Voltage Bottom
Entrance (feed through the
base of the unit)
Combination Knockout
1-1/8” and 1-3/4”
(29 mm and 44 mm)
HVT2
High-Voltage Top Connection
(120 V Units)
Knockout 1-3/4 (44 mm)
LVT1
Low-Voltage Top
Connection (Twisted Pair)
Knockout Holes, 2,
Diameter 7/8” (22 mm)
LVB1
Low-Voltage Top Connection
(Twisted Pair)
Knockout Holes, 2,
Diameter, 7/8” (22 mm)
LVT2
Low-Voltage Top
Connection (Shielded Cable)
Knockout Holes, 2,
Diameter 7/8” (22 mm)
LVB2
Low-Voltage Top Connection
(Shielded Cable)
Knockout Holes, 2,
Diameter, 7/8” (22 mm)
TDM
Tie-Down Mounting (Top)
Hole Diameter
1/8” (3 mm) 4 Places
Liebert® CRV™ System Design Manual
Source: DPN002815, Rev. 5
50
Knockout, 1-3/4” (44 mm)
Piping
6.0 Piping
Figure 6-1 General arrangement with condenser—Air-cooled, 600 mm (24 in.)
For details, refer to refer to section 8.1 - Liebert MC Condenser Selections—CRV Units and to section
8.6 - Fin/Tube Condenser Selections—600 mm (24 in.).
OUTDOOR VFD CONDENSER
OUTDOOR LEE-TEMP CONDENSER
Head Pressure
Control Valve
Optional Field Installed
Fusible Plug
VFD Transducer
Condenser Coil
(VFD)
Check Valve
Condenser Coil
(Lee-Temp)
Relief Valve
Lee-Temp Receiver
Liquid Return
Hot Gas Discharge
Hot Gas Discharge
Liebert CRV Unit and associated Piping
Filter
Drier
Sight
Glass
Solenoid
Valve
Expansion
Valve
Distributor
Evaporator Coil
External Equalizer
Service Valve
High Pressure
Transducer
Sensing
Bulb
CR020 Digital
Solenoid Valve
* For rises over
25ft (7.6m), trap
every 20ft (6m)
or evenly divided.
Vibration Absorber
High Pressure
Cut Out
Suction Line
Low Pressure Transducer
CR035 Digital
Solenoid Valve
Digital Scroll
Compressor
Service Valve
Hot Gas Discharge
Vibration Absorber
Check Valve
Isolation Valve
*Isolation Valve
*Isolation Valve
Liquid Return
FACTORY REFRIGERANT PIPING
FIELD PIPING
SERVICE / SCHRADER (ACCESS) CONNECTION NO VALVE CORE
SERVICE / SCHRADER (ACCESS) CONNECTION WITH VALVE CORE
NOTES:
1. SCHEMATIC REPRESENTATION SHOWN. DO NOT USE FOR SPECIFIC CONNECTION LOCATIONS.
2. ONE OR MORE ADDITIONAL PRESSURE RELIEF VALVES ARE REQUIRED DOWNSTREAM OF ANY
AND ALL FIELD-INSTALLED ISOLATION. DO NOT ISOLATE ANY REFRIGERANT CIRCUITS FROM
OVERPRESSURIZATION PROTECTION.
51
* Components are not supplied by
Liebert but are required for
proper circuit operation and
maintenance. Should be located
near the indoor Liebert CRV unit.
+ Inverted Trap on Discharge and
Liquid Lines to extend above the
base of the coil by a minimum of
190mm (7-1/2").
Liebert® CRV™ System Design Manual
Piping
Figure 6-2 General arrangement with —Air-cooled, 300 mm (12 in.)
LIEBERT MC CONDENSER
WITH LEE-TEMP RECEIVER
LIEBERT MC CONDENSER
Optional Field
Installed Fusible
Plug
Pressure
Transducer
Condenser Coil
Includes factory provided
inverted trap. No external
trap required.
Pressure
Transducer
Liquid
Head Pressure
Control Valve
Condenser Coil
Liquid
Includes factory provided
inverted trap. No external
trap required.
Hot Gas Discharge
Check Valve
Relief Valve
Service
Valve
Lee-Temp Receiver
Liquid Return
Hot Gas Discharge
LIEBERT CRV UNIT AND ASSOCIATED PIPING
Filter
Drier
Solenoid
Valve
Sight
Glass
Expansion
Valve
Distributor
Evaporator Coil
Sensing
Bulb
External Equalizer
CR019 Digital Solenoid Valve
High Pressure
Transducer
* For rises over
25ft (7.6m), trap
every 20ft (6m)
or evenly divided.
Low Pressure Transducer
Suction Line
Digital Scroll
Compressor
Check Valve
Hot Gas Discharge
*Isolation Valve
*Isolation Valve
Liquid Return
FACTORY REFRIGERANT PIPING
FIELD PIPING
SERVICE / SCHRADER (ACCESS) CONNECTION WITH VALVE CORE
NOTES:
1. SCHEMATIC REPRESENTATION SHOWN. DO NOT USE FOR SPECIFIC CONNECTION LOCATIONS.
2. ONE OR MORE ADDITIONAL PRESSURE RELIEF VALVES ARE REQUIRED DOWNSTREAM OF ANY
AND ALL FIELD-INSTALLED ISOLATION. DO NOT ISOLATE ANY REFRIGERANT CIRCUITS FROM
OVERPRESSURIZATION PROTECTION.
3. REFER TO OUTDOOR CONDENSER DOCUMENTS ABOVE FOR PROPER TRAP PLACEMENT.
Liebert® CRV™ System Design Manual
52
* Components are not supplied by
Liebert but are required for
proper circuit operat ion and
maintenance. Isolation valves
should be located near the indoor
Liebert CRV unit.
DPN002808
Rev. 3
Piping
Figure 6-3 General arrangement—Water/Glycol-cooled, 600 mm (24 in.)
Distributor
Evaporator Coil
Vibration
Absorber
CR020 Digital
Solenoid Valve
Sensing
Bulb
Rotalock Valve
High Pressure
Transducer
CR035 Digital
Solenoid Valve
External Equalizer
Low Pressure
Transducer
High Pressure
Switch
Rotalock Valve
Expansion
Valve
Digital Scroll
Compressor
Vibration
Absorber
Check
Valve
Check Valve
Water/Glycol Return
Top Connection
Differential
Check Valve
(145psi)
3-Way Valve
Configuration
Solenoid
Valve
Filter
Drier
AB
B
Water/Glycol Return
Bottom Connection
Relief
Valve
A
Water
Cooled
Brazed
Plate
Condenser
2-Way Valve
Configuration
Receiver
AB
A
B
Water/Glycol Supply
Top Connection
Valve
Fitting
Blocker
Disk
FACTORY REFRIGERANT PIPING
Water/Glycol Supply
Bottom Connection
SERVICE / SCHRADER (ACCESS) CONNECTION NO VALVE CORE
NOTES:
SERVICE / SCHRADER (ACCESS) CONNECTION WITH VALVE CORE
1. SCHEMATIC REPRESENTATION SHOWN. DO NOT USE FOR S PECIFIC CONNECTION LOCATIONS.
2. INSTALL A 20 MESH STRAINER, IN AN EASILY ACCESSIBLE LOCATION, ON THE WATER/GLYCOL
SUPPLY TO PREVENT PARTICLES FROM ENTERING THE HEAT EXCHANGER. STRAINER BYPASS
VALVES ARE RECOMMENDED TO ALLOW THE STRAINER TO BE CLEANED WHILE MAINTAINING
53
DPN001985
Rev. 2
Liebert® CRV™ System Design Manual
Piping
Figure 6-4 General arrangement—Water/Glycol-cooled, 300 mm (12 in.)
Distributor
Evaporator Coil
Sensing
Bulb
Digital
Solenoid
Valve
Low Pressure
Transducer
Rotalock Valve
High Pressure
Transducer
External Equalizer
Digital
Scroll
Compressor
Expansion
Valve
Rotalock Valve
High Pressure Switch
Water/Glycol Return
(see note 3)
3-Way Valve
Configuration
Filter
Drier
AB
A
B
SEE NOTE 4
Water
Cooled
Brazed
Plate
Condenser
2-Way Valve
Configuration
Tank
A
AB
B
Water/Glycol Supply
(see note 3)
Valve
Fitting
Blocker
Disk
SEE NOTE 4
FACTORY REFRIGERANT PIPING
SERVICE / SCHRADER (ACCESS) CONNECTION NO VALVE CORE
SERVICE / SCHRADER (ACCESS) CONNECTION WITH VALVE CORE
NOTES:
1. SCHEMATIC REPRESENTATION SHOWN. DO NOT USE FOR SPECIFIC CONNECTION LOCATIONS.
2. INSTALL A 20 MESH STRAINER, IN AN EASILY ACCESSIBLE LOCATION, ON THE WATER/GLYCOL SUPPLY TO PREVENT PARTICLES
FROM ENTERING THE HEAT EXCHANGER. STRAINER BYPASS VALVES ARE RECCOMENDED TO ALLOW THE STRAINER TO BE
CLEANED WHILE MAINTAINING FLOW TO THE COOLING UNIT.
3. UNIT CONNECTIONS MAY BE ORDERED TOP OR BOTTOM.
4. VALVE NOT PROVIDED BY LIEBERT BUT ARE REQUIRED FOR PROPER CIRCUIT OPERATION AND MAINTENANCE. THEY SHOULD
BE LOCATED NEAR THE LIEBERT CRV300 UNIT.
Liebert® CRV™ System Design Manual
54
DPN003039
Rev. 1
Piping
Figure 6-5 General arrangement—Chilled-water CR040, 600 mm (24)
Chilled
Water
Coil
Air Bleed Valve
A
A
B
AB
3-Way Motorized Ball
Valve Configuration
OR
AB
2-Way Motorized Ball
Valve Configuration
Plug Pipe
Chilled Water Return
(Top of Unit Connection)
Plug Pipe
Chilled Water Return
(Bottom of Unit Connection)
Plug Pipe
Chilled Water Supply
(Top of Unit Connection)
Plug Pipe
Chilled Water Supply
(Bottom of Unit Connection)
FACTORY PIPING
NOTE: SCHEMATIC REPRESENTATION SHOWN. DO NOT USE FOR SPECIFIC CONNECTION LOCATIONS.
55
DPN001986
Rev. 4
Liebert® CRV™ System Design Manual
Piping
Figure 6-6 General arrangement—Chilled-water CR030 and CR034, 300 mm (12 in.)
Chilled
Water
Coil
A
AB
B
AB
3-Way Motorized Ball
Valve Configuration
OR
A
2-Way Motorized Ball
Valve Configuration
Plug Pipe
Chilled Water Supply
(Top of Unit Connection)
Plug Pipe
Chilled Water Supply
(Bottom of Unit Connection)
Plug Pipe
Chilled Water Return
(Top of Unit Connection)
Plug Pipe
Chilled Water Return
(Bottom of Unit Connection)
FACTORY PIPING
NOTE: SCHEMATIC REPRESENTATION SHOWN. DO NOT USE FOR SPECIFIC CONNECTION LOCATIONS.
Liebert® CRV™ System Design Manual
56
DPN002976
Rev. 1
Electrical Connections
7.0 Electrical Connections
7.1 Standard electrical features—600 mm (24 in.)
Source: DPN001884, Rev. 7, Pg. 1
1. High voltage connection through the bottom of the electric panel – 1-3/8” (34.9 mm), 1-3/4”
(44.5 mm) & 2-1/2” (64mm) diameter concentric knockout. Shown in Figure 7-1 - Electrical fieldconnections—600 mm (24 in.).
2. Low voltage connection through the bottom of the electric panel - Quantity (2) 7/8” (22 mm)
diameter knockouts. Shown in Figure 7-1 - Electrical field-connections—600 mm (24 in.).
3. High voltage connection through the top of the unit – 1-3/8” (34.9 mm), 1-3/4” (44.5 mm) & 2-1/2”
(64 mm) diameter concentric knockout. Shown in Figure 7-1 - Electrical field-connections—600
mm (24 in.).
4. Low voltage connection through the top of the unit - Quantity (4) 7/8” (22 mm) diameter
knockouts. Shown in Figure 7-1 - Electrical field-connections—600 mm (24 in.).
5. Three phase electrical service – Connect to terminals on disconnect switch. Three phase service not
by Liebert. (see Acceptable unit input electrical service for 460-V (480-V) nominal units on
page 59 for an important note regarding unit electrical service)
6. Factory Installed locking Disconnect Switch
7. Earth ground - Terminal for field supplied earth grounding wire.
8. Remote unit shutdown - Replace existing jumper between terminals 37 & 38 with field supplied
normally closed switch having a minimum 75 VA, 24 VAC rating. Use field supplied Class 1 wiring.
9. Customer alarm inputs - Terminals for field supplied, normally closed contacts, having a minimum
75 VA, 24 VAC rating, between terminals 3 & 50, 2 & 51, 5 & 55, or 3 & 56. Use field supplied Class 1
wiring. Terminal 3 & 56 are used for humidifier alarm when a humidifier is installed. The remaining
terminals are available for customer alarm inputs, such as; smoke sensors and building fire alarms.
10. Common alarm - On any alarm, normally open dry contact is closed across terminals 75 & 76 for
remote indication. 1 AMP, 24 VAC max load. Use Class 1 field supplied wiring.
11. Heat rejection interlock - On any call for compressor operation, normally open dry contact is closed
across terminals 70 & 71 to heat rejection equipment. 1 AMP, 24 VAC max load. Use Class 1 field
supplied wiring.
57
Liebert® CRV™ System Design Manual
Electrical Connections
12. CANbus Connector – Terminal block with terminals 49-1 (CAN-H) and 49-3 (CAN-L) + SH (shield
connection). The terminals are used to connect the CANbus communication cable (provided by others)
from the indoor unit to the Liebert Microchannel Condenser
• Premium Model.
CANbus Cable – CANbus cable provided by others to connect to the outdoor condenser. No special
considerations are required when the total external cable connection between the indoor unit and
outdoor unit(s) is less than 450FT (137M). For total external cable connections greater than 450FT
(137M) but less than 800FT (243M) a CANbus isolator is required. Cable must have the following
specifications:
• Conductors 22-18AWG stranded tinned copper
• Twisted pair (minimum 4 twists per foot)
• Braided shield or foil shield with drain wire
• Low Capacitance (15pF/FT or less)
• UL approved temperature rated to 75° C
• UL approved voltage rated to 300V
• UV-resistant and moisture-resistant if not run in conduit
• Plenum rated NEC type CMP, if required by national or local codes
• EXAMPLES BELDEN 89207 (PLENUM RATED), OR ALPHA WIRE 6454 CATEGORY 5, 5E, OR
HIGHER
7.2 Optional electrical features—600 mm (24 in.)
Source: DPN001884, Rev. 7, Pg. 1
13. Condensate Pump High Water Alarm (available when optional pump is installed)—On pump
high-water indication, normally open dry contact is closed across Terminals 88 and 89 for remote
indication. 1 A, 24 VAC maximum load. Use field-supplied Class 1 wiring.
14. Liebert Liqui-tect® Shutdown and Dry Contact (available when optional Liebert Liqui-tect sensor is
installed)—On Liebert Liqui-tect activation, normally open dry contact is closed across Terminals 58
and 59 for remote indication. The Liebert Liqui-tect sensor notifies the Liebert iCOM® of indication
through Terminals 60 and 61. 1 A, 24 VAC maximum load. Use field-supplied Class 1 wiring.
15. Reheat and Humidifier Lockout—Remote 24 VAC required at Terminals 82 and 83 for lockout of
reheat and humidifier.
16. Additional Common Alarm—On any alarm, one additional normally open dry contact is closed
across Terminals 94 and 95 for remote indication. 1 A, 24 VAC maximum load. Use Class 1,
field-supplied wiring.
NOTE
Refer to specification sheet for total unit full load amps, wire size amps and maximum overcurrent
protective device size.
NOTICE
Risk of improper input power. Can cause equipment damage.
The electronically commutated motors included in the Liebert CRV—included in 480-V CR035 and
CR040 units—are suitable for connection to an electrical service providing input power to the unit
with 300V or less line-to-ground potential only.
Liebert® CRV™ System Design Manual
58
Electrical Connections
Acceptable unit input electrical service for 460-V (480-V) nominal units
• 480V Wye with solidly grounded neutral and 277V line to ground
Un-acceptable unit input electrical service for 460-V (480-V) nominal units
•
•
•
•
Wye with high resistance (or impedance) ground
Delta without ground or with floating ground
Delta with corner ground
Delta with grounded center tap
Figure 7-1 Electrical field-connections—600 mm (24 in.)
3
UNIT TOP
4
4
Refer to Section 7.1 - Standard electrical features—600 mm (24 in.)
and Section 7.2 - Optional electrical features—600 mm (24 in.) for
keys to numbered components.
16
OVERLOAD PROTECTORS
10
NOT
USED
13
15
NOT
USED
CONTACTORS
12
11
8
14
UNIT DISCONNECT
SWITCH
9
FACTORY
TERMINALS
7
9
5
6
2
TYPICAL 2
1
2-1/2" (64mm)
Filed high volt K.O.
1-3/32" (28mm)
Filed low volt K.O.
UNIT BASE
1-3/4" (44.5mm)
Field low volt CANbus K.O.
59
DPN001884
Pg. 3 Rev. 7
Liebert® CRV™ System Design Manual
Electrical Connections
7.3 Standard electrical features—300 mm (12 in.)
DX and CW Models
Source: DPN002810, Pg. 1, Rev. 5
1. High-Voltage Connection Through the Rear of the Disconnect Switch Box—1-1/8” (28.6 mm) and
1-3/4” (44.5 mm) diameter concentric knockout.
2. High-Voltage Connection Through the Top of the Unit—1-1/4” (32 mm) and 1-3/4” (44.5 mm)
diameter concentric knockout, not shown; see Figure 7-4.
3. Electrical Service (hard-wired)—refer to serial tag for unit electrical service requirements.
• Three-Phase: 208/230 V, 60 Hz units
• Three phase with Neutral: 460-V Wye-connected (5 wire, 3-phase + neutral + ground).
• Single phase: 208/230 V (chilled water only).
Connect to terminals on disconnect switch. Electrical service not by Emerson. Use copper
conductors only. Wire per local codes. Refer to specification sheet for total unit full load amps, wire
size amps and maximum overcurrent protective device size. Refer to Notice on page 62 for
information about electrical service.)
4. Electrical Service (cord connected)—Refer to serial tag for unit electrical service requirements.
5. Single phase – 120 V, 60 Hz (chilled water only). 1-3/4” (44 mm) diameter knockouts provided in the
top and bottom of the unit for the power cord to exit the unit. The power cord is factory-supplied with an
L5-20 plug.
6. Factory-Installed Locking Disconnect Switch
7. Earth Ground—Terminal for field-supplied earth grounding wire.
8. Low-Voltage Connection Through the Bottom of the Unit—Two knockouts, 7/8” (22 mm) diameter,
not shown; see Figure 7-4.
9. Low-Voltage Connection Through the Top of the Unit—Two knockouts, 7/8” (22 mm) diameter, not
shown; see Figure 7-4.
10. Remote Unit Shutdown—Replace existing jumper between Terminals 37 and 38 with field-supplied
normally closed switch having a minimum 75 VA, 24 VAC rating. Use field-supplied Class 1 wiring.
11. Customer Alarm Inputs—Terminals for field-supplied, normally closed contacts having a minimum
75 VA, 24 VAC rating between Terminals 3 and 50, Terminals 2 and 51, Terminals 5 and 55 or
Terminals 3 and 56. Use field-supplied Class 1 wiring. Terminals 5 and 55 not available when optional
condensate pump is installed.
12. Common Alarm—On any alarm, normally open dry contact is closed across Terminals 75 and 76 for
remote indication. 1 A, 24 VAC maximum load. Use field-supplied Class 1 wiring.
13. Heat Rejection Interlock—On any call for compressor operation, normally open dry contact is closed
across Terminals 70 and 71 to heat rejection equipment. 1 A, 24 VAC maximum load. Use fieldsupplied Class 1 wiring.
Liebert® CRV™ System Design Manual
60
Electrical Connections
14. CANbus Connector—Terminal block with Terminals 49-1 (CAN-H) and 49-3 (CAN-L) + SH (shield
connection). The terminals are used to connect the CANbus communication cable (provided by others)
from the indoor unit to the Liebert MC, Premium Model.
CANbus Cable—CANbus cable provided by others to connect to the outdoor condenser. No special
considerations are required when the total external cable connection between the indoor unit and
outdoor unit(s) is less than 450 ft. (137 m). A CANbus isolator is required for total external cable
connections greater than 450 ft. (137 m) but less than 800 ft. (243 m). Cable must meet the following
specifications:
• Conductors—22-18AWG stranded, tinned copper
• Twisted pair (minimum four twists per foot [305mm])
• Braided shield or foil shield with drain wire
• Low capacitance—15pF/ft or less
• UL-approved temperature rated to 167°F (75°C)
• UL-approved voltage rated to 300V
• UV-resistant and moisture-resistant if not run in conduit
• Plenum rated—NEC type CMP if required by national or local codes
Examples: Belden 89207 (plenum rated) or Alpha Wire 6454 Category 5, 5e, or higher
61
Liebert® CRV™ System Design Manual
Electrical Connections
7.3.1
Power-supply Requirements for 460-V, 300 mm (12 in.)
Wye vs. Delta Connection Power Supply
Figure 7-2 Wye vs. delta power supply connection diagram
Phase A
Phase A
Phase B
Neutral
Phase B
Phase C
Ground
Wye Power Supply Connection
Phase C
Delta Power Supply Connection
NOTICE
Risk of improper input power. Can cause equipment damage.
The 460-volt Liebert CRV 300 mm (12 in.) unit is designed to operate with Wye-connected power
with a solidly-grounded neutral. It will not operate properly with Wye-connected power with highresistance (or impedance) ground or with Delta-connected power.
Acceptable Power Supplies—480-V Nominal Units
• 480-V Wye with solidly grounded neutral and 277 V line-to-ground
Unacceptable Power Supplies—480-V Nominal Units
•
•
•
•
Wye with high-resistance (or impedance) ground
Delta without ground or with floating ground
Delta with corner ground
Delta with grounded center tap
7.4 Optional electrical features—300 mm (12 in.) DX Models
Source: DPN002810, Pg. 1, Rev. 5
15. Condensate Pump High Water Alarm (available when optional pump is installed)—On pump high
water indication, normally open dry contact is closed across Terminals 88 and 89 for remote indication.
1 A, 24 VAC maximum load. Use field-supplied Class 1 wiring.
16. Liebert Liqui-tect® Shutdown and Dry Contact (available when optional Liebert Liqui-tect sensor is
installed)—On Liebert Liqui-tect activation, normally open dry contact is closed across Terminals 58
and 59 for remote indication. The Liebert Liqui-tect sensor notifies Liebert iCOM® of indication through
Terminals 60 and 61. 1 A, 24 VAC maximum load. Use field-supplied Class 1 wiring.
17. Additional Common Alarm—On any alarm, one additional normally open dry contact is closed
across Terminals 94 and 95 for remote indication. 1 A, 24 VAC maximum load. Use field-supplied
Class 1 wiring.
Liebert® CRV™ System Design Manual
62
Electrical Connections
7.5 Electrical Disconnect Views—300 mm (12 in.)
Figure 7-3 Electrical disconnect views—300 mm (12 in.)
DISCONNECT VIEWS
3
6
5
208/230V 3 phase
460V wye
208/230V 1 phase
120V cord connected
(3 phase + neutral + ground)
(CW only)
(CW only)
DPN002810
Pg. 4 Rev. 5
63
Liebert® CRV™ System Design Manual
Electrical Connections
Figure 7-4 Electrical field-connections—Air-cooled and Water/Glycol-cooled, 300 mm (12 in.)
Refer to sections 7.3 - Standard electrical features—300 mm (12 in.)
DX and CW Models
and 7.4 - Optional electrical features—300 mm (12 in.) DX Models for keys to
numbered components.
See Figure 7-3
for views of
disconnects.
See Figure 7-6 for low-voltage
field wiring routing into the unit
1.75
44.5
A
K.O.
1.13
28.6
K.O.
1
5
A
VIEW A-A
2
8
B
Rear
View
Factory provided conduit for routing
field low voltage wiring to unit
electric box.
16 11
10
13
VIEW B-B
Upper terminals
Air and Water/
Glycol units only.
14 12
15
9
10
FACTORY
TERMINALS
B
10
Factory provided
conduit for routing
field low voltage
wiring to unit
electric box.
See note below.
Rotate 1/4 turn
clockwise to allow
access to electrical
components.
Note: All internal low voltage field wiring must be secured with cable ties away
from moving parts, high temperature surfaces, and high voltage wiring.
VIEW B-B
Lower terminals
SOME COMPONENTS NOT SHOWN
General wire routing paths shown. Wiring must be run in conduit and must be inside the
Liebert CRV frame and panels. Attach conduit to the inside of the rails with cable ties.
Control wiring must be run in separate conduit from power wiring. For top entry routing,
see Figure 7-9; for bottom entry, see Figures 7-10 and Figures 7-11.
Liebert® CRV™ System Design Manual
64
DPN002810
Pg. 3 Rev. 5
Electrical Connections
Figure 7-5 Electrical field connections 120 V—Chilled-water, 300 mm (12 in.)
4
4
MAIN POWER CORD ROUTING - 120V CW UNITS
4
DPN002810
Pg. 5 Rev. 5
65
Liebert® CRV™ System Design Manual
Electrical Connections
Figure 7-6 Low-voltage field wiring routing into the unit—
Air-cooled and Water/Glycol-cooled, 300 mm (12 in.)
Low Voltage
Field Wiring
Factory Wiring
Low Voltage
Field Wiring
DPN003588
Rev. 0
Liebert® CRV™ System Design Manual
66
Electrical Connections
Figure 7-7 Power cable routing—Bottom-entry, Air-cooled and Water/Glycol-cooled, 300 mm (12 in.)
Use rear knockout
on Main Disconnect
for High Voltage wire entry
Notes:
1. Some components not shown for clarity.
2. General wire routing paths shown. Wiring must be
run in conduit and must be inside Liebert CRV frame
and panels. Attach conduit to inside of rails with
cable ties.
3. Control wiring must be run in separate conduit from
power wiring. Refer to DPN002814 page 2 for
bottom entry wire routing.
Front
High Voltage Wire Routing
Bottom Entry
DPN003589
Rev. 0
Rear
67
Liebert® CRV™ System Design Manual
Electrical Connections
Figure 7-8 Power cable routing—Bottom-entry, Chilled-water, 300 mm (12 in.)
Use rear knockout
on Main Disconnect
for High Voltage wire entry
Notes:
1. Some components not shown for clarity.
2. General wire routing paths shown. Wiring must be
run in conduit and must be inside Liebert CRV frame
and panels. Attach conduit to inside of rails with
cable ties.
3. Control wiring must be run in separate conduit from
power wiring. Refer to DPN002814 page 3 for
bottom entry wire routing.
Front
High Voltage Wire Routing
Bottom Entry
DPN003590
Rev. 0
Rear
Liebert® CRV™ System Design Manual
68
Electrical Connections
Figure 7-9 Liebert IntelliSlot™ cable routing—Top-entry, All models, 300 mm (12 in.)
Low voltage field wiring
(twisted pair)
Low voltage field wiring
(twisted pair)
DPN002814
Pg. 1 Rev. 5
69
Liebert® CRV™ System Design Manual
Electrical Connections
Figure 7-10 Liebert IntelliSlot™ cable routing—Bottom-entry,
Air-cooled and Water/Glycol-cooled, 300 mm (12 in.)
Low voltage field wiring
(shielded cable)
Low voltage field wiring
(twisted pair)
Secure tie the field wiring shielded cable to
the rail. Route the shielded cable up toward
the Intellislots and fasten to the side rails
as needed.
Liebert® CRV™ System Design Manual
70
DPN002814
Pg. 2 Rev. 5
Electrical Connections
Figure 7-11 Liebert IntelliSlot™ cable routing—Bottom-entry, Chilled-water, 300 mm (12 in.)
SOME COMPONENTS NOT SHOWN
General wire routing paths shown. Wiring must be run in conduit
and must be inside Liebert CRV frame and panels. Attach conduit to
inside of rails with cable ties.
Shielded cable may be used. If not, control wiring must be run in
separate conduit from power wiring.
Secure the control wiring or conduit to the bottom edge of the rail
with cable ties. Route the shielded cable up toward the Liebert
IntelliSlot bays and fasten to the side rails as needed.
Low voltage field wiring
(shielded cable)
Low voltage field wiring
(twisted pair)
Secure the shielded cable to the rail.
Route the shielded cable up toward
the Intellislots and fasten to the side
rails as needed.
DPN002814
Pg. 3 Rev. 5
71
Liebert® CRV™ System Design Manual
Electrical Connections
Page intentionally left blank.
Liebert® CRV™ System Design Manual
72
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
8.0 Heat Rejection—Liebert MC™
and Fin/Tube Condensers
All Liebert condensers are designed to work with the Liebert CRV.
8.1 Liebert MC Condenser Selections—CRV Units
For best performance, lowest sound and most energy-efficient operation, Emerson recommends matching
a Liebert CRV 20kW or 35kW air-cooled unit with a Liebert MC condenser. The Liebert MC provides
greater heat rejection and lower condensing temperatures than the legacy fin-tube condenser match-ups
shown below.
Table 8-1
Outdoor Design Ambient Temperature, °F (°C)
Unit
Width
Indoor Model
CR019RA
Traditional open room 95°F (35°C)/23RH return air conditions
300 mm (12 in.)
CR020A
600 mm (24 in.)
CR035A
95 (35)
100 (38)
105 (41)
110 (43)
115 (46)
120 (49)
MCS028E1
MCM040E1
MCM040E1
MCM040E1
MCL055E1
MCL055E1
MCM040E1
MCL055E1
MCL055E1
MCM080E1
MCM080E1
MCM080E1
* 300 mm (12 in.) DX model
Table 8-2
Traditional open room 95°F (35°C)/23RH return air conditions, Liebert QuietLine operation
Outdoor Design Ambient Temperature, °F (°C)
Indoor Model
CR019RA
Unit Width
300 mm (12 in.)
CR020A
600 mm (24 in.)
CR035A
95 (35)
100 (38)
105 (41)
110 (43)
115 (46)
MCS028E1
MCM040E1
MCL055E1
MCL055E1
MCM080E1
MCL055E1
MCL055E1
MCM080E1
MCM080E1
MCL110E1
120 (49)
—
—
—
* 300 mm (12 in.) DX model
8.2 Liebert MC Condenser Dimensions and Weights
Table 8-3
Liebert MC Condenser approximate net and shipping weights, dimensions, and volume
Domestic Packaging
Model #
Packaged
Weight, lb (kg)
Dimensions
(LxWxH), in. (cm)
MCS028
359 (163)
76 x 36 x 63
(193 x 91 x 160)
MCM040
439 (199)
MCM080
Export Packaging
Volume
Volume
Packaged
Weight, lb (kg)
Dimensions
(LxWxH), in. (cm)
100 (2.8)
476 (216)
77 x 37 x 64
(196 x 94 x 163)
106 (3.0)
76 x 36 x 63
(193 x 91 x 160)
100 (2.8)
556 (252)
77 x 37 x 64
(196 x 94 x 163)
106 (3.0)
769 (349)
122 x 36 x 63
(310 x 91 x 160)
179 (5.0)
941 (427)
123 x 37 x 64
(312 x 94 x 163)
188 (5.3)
MCL055
552 (250)
76 x 36 x 63
(193 x 91 x 160)
100 (2.8)
669 (303)
77 x 37 x 64
(196 x 94 x 163)
106 (3.0)
MCL110
962 (436)
136 x 36 x 63
(345 x 91 x 160)
179 (5.0)
1134 (514)
137 x 37 x 64
(348 x 94 x 163)
188 (5.3)
ft3
(m3)
ft3 (m3)
Weights are based on units with EC fans, units with AC fans may be slightly less.
Net and packaged weights will increase with factory options: legs taller than 18", coated coils and seismic options. Field-installed receivers
also add to net weights. Consult factory for additional information. See Table 8-4 for weight added by longer legs.
73
Liebert® CRV™ System Design Manual
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
Table 8-4
Liebert MC Condenser dry weight with additional option(s)
Additional Weight by Condenser Model, lb. (kg)
MCS028
MCM040
Leg Height
In. (mm)
1
Circuit
1
Circuit
1
Circuit
2
Circuits
1
Circuit
1
Circuit
2
Circuits
18 (457)
154 (70)
231 (105)
441 (200)
441 (200)
344 (156)
602 (273)
602 (273)
36 (914)
286 (130)
363 (165)
590 (268)
590 (268)
486 (220)
766 (347)
766 (347)
48 (1219)
318 (144)
395 (179)
622 (282)
622 (282)
518 (235)
798 (362)
798 (362)
60 (1524)
349 (158)
426 (193)
653 (296)
653 (296)
549 (249)
829 (376)
829 (376)
55 (25)
55 (25)
100 (45)
110 (50)
60 (27)
115 (52)
120 (54)
Liebert Lee-Temp
Receiver
Coated Coil
575V
MCM080
MCL055
MCL110
4 (2)
5 (2)
10 (5)
10 (5)
8 (4)
16 (7)
16 (7)
52 (24)
52 (24)
63 (29)
63 (29)
79 (36)
90 (41)
90 (41)
Condenser + Liebert Lee-Temp + Coated Coil = Total Weight
Source: DPN003034, Rev. 1
Liebert® CRV™ System Design Manual
74
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
Figure 8-1 MC Condenser planning dimensional data—MCS028, MCM040 and MCL055
575V
Option
575V
Option
H
TOP OF
FAN GUARD
G
F
A
A*
Lee-Temp Receiver
C
Entering Hot Gas and
Leaving Liquid Piping
D
A
Main
Electric
Box
End
Anchor
Plan
M L K
6 1/2"
165mm
15 1/4"
387mm
Left Side of Unit
3 5/8"
93mm
Typ.
13/16"
21mm
Typ.
Ref.
K
Front View (Lee-Temp Shown)
1 7/8"
48mm
Typ.
Note:
1. Emerson recommends a clearance of
36” (915mm) on each side for proper
operation and component access.
7"
178mm
Typ.
2
DETAIL A
Typical all legs
1/2" (13mm) X 1" (25mm)
Obround Typ.
Model
A
A*
(575 V only)
C
MCS028
50-5/8 (1287)
58-7/8 (1495)
Cross Bracing required for legs longer
than 18" (457.2mm). Quantity varies
per model & options selected.
DPN003436
Rev. 0
D
K
L
M
44-1/8 (1120)
42-1/2 (1080)
42-1/2 (1080)
40-7/8 (1038)
35-7/8 (910)
MCM040 57-3/16 (1453) 65-3/8 (1661)
48 (1219)
46-5/16 (1177)
46 (1168)
44-3/8 (1127)
39-5/16 (999)
MCL055
56 (1422)
54-3/8 (1381)
55-1/2 (1410)
53-7/8 (1368)
48-3/4 (1238)
68 (1727)
77 (1956)
F (Leg-height)
in. (mm)
All Models
G
in. (mm)
H
in. (mm)
MCS028
MCM040
G
in. (mm)
H
in. (mm)
MCL055
18 (457)
31-5/8 (803)
39-5/8 (1006)
35-7/8 (911)
43-5/8 (1108)
36 (914)
49-5/8 (1260)
57-5/8 (1464)
53-7/8 (1368)
61-5/8 (1565)
48 (1219)
61-5/8 (1565)
69-5/8 (1768)
65-7/8 (1673)
73-5/8 (1870)
60 (1524)
73-5/8 (1870)
81-5/8 (2073)
77-7/8 (1978)
85-5/8 (2175)
See Tables 8-3 and 8-4 for weights, including added weight for legs of various lengths.
Source DPN003436 Rev. 0
75
Liebert® CRV™ System Design Manual
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
Figure 8-2 MC Condenser planning dimensional data—MCM080 and MCL110
575V
Option
575V
Option
H
TOP OF
G FAN GUARD
A*
A
F
Lee-Temp or DSE Receiver
C
Entering Hot Gas and
Leaving Liquid Piping
D
A
Anchor Plan
Main
Electric
Box
End
Full height leg supplied for
each Lee-Temp or
DSE Receiver required
M L K
6 1/2"
165mm
15 1/4"
387mm
J
Lee-Temp or DSE Only
Left Side of Unit
13/16"
21mm
Typ.
6 1/2"
165mm Ref.
Dual Circuit Only
Ref.
15 1/4"
387mm
Dual Circuit Only
K
Front View (Lee-Temp Shown)
3 5/8"
93mm
Typ.
7"
178mm
Typ.
Note:
1. Emerson recommends a clearance of
36” (915mm) on each side for proper
operation and component access.
1 7/8"
48mm
Typ.
1/2" (13mm) X 1" (25mm)
Obround Typ.
2 Cross bracing required for legs longer
than 18" (457mm). Quantity varies per
model & options selected.
DETAIL A
DPN00437
Rev. 2
Typical All Legs
Model
A
A* (575 V only)
C
J
Lee-Temp or
DSE Receivers
only
D
MCM080
105-1/4 (2674) 113-7/16 (2882) 96-1/16 (2440) 94-7/16 (2398) 46-5/16 (1177)
MCL110
124-1/8 (3152) 133-1/8 (3381) 112-1/8 (2848) 110-1/2 (2806)
F (Leg-height)
in. (mm)
G
in. (mm)
31-5/8 (803)
L
46 (1168)
44-3/8 (1127)
39-5/16 (999)
53-7/8 (1368)
48-3/4 (1238)
G
in. (mm)
H
in. (mm)
39-5/8 (1006)
35-7/8 (911)
MCL110
43-5/8 (1108)
36 (914)
49-5/8 (1260)
57-5/8 (1464)
53-7/8 (1368)
61-5/8 (1565)
48 (1219)
61-5/8 (1565)
69-5/8 (1768)
65-7/8 (1673)
73-5/8 (1870)
60 (1524)
73-5/8 (1870)
81-5/8 (2073)
77-7/8 (1978)
85-5/8 (2175)
See Tables 8-3 and 8-4 for weights, including added weight for legs of various lengths.
Source DPN003437 Rev. 2
Liebert® CRV™ System Design Manual
76
M
55-1/2 (1410)
H
in. (mm)
MCS056
MCM080
All Models
18 (457)
54-3/8 (1381)
K
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
8.3 Liebert MC Condenser Electrical Data
Table 8-5
MC Condenser electrical data, 3-phase, 60-Hz condenser, Premium Version (EC control)
MCS028
Voltage
MCM040
MCM080
MCL055
MCL110
FLA WSA OPD FLA WSA OPD FLA WSA OPD FLA WSA OPD FLA WSA OPD
208/230 V
3
3.8
15
2.3
3.2
15
4.6
5.5
15
5.7
7.1
15
11.4
12.8
15
460 V
1.4
1.8
15
1.4
1.9
15
2.8
3.3
15
2.8
3.5
15
5.6
6.3
15
575 V
1.2
1.5
15
1.2
1.6
15
2.3
2.8
15
2.3
2.9
15
4.7
5.3
15
1. FLA = Full Load Amps; WSA = Wire Size Amps; OPD = Maximum Overcurrent Protection Device.
2. 208-V – 460-V premium models must be connected to Wye 3-phase systems with solidly grounded neutral.
Table 8-6
MC Condenser electrical data—Liebert Lee-Temp receiver, 60 Hz
Rated Voltage - Single- Phase
120
200/208/230
Watts/Receiver
150
300
150
300
Full Load Amps
1.4
2.8
0.7
1.4
Wire Size Amps
1.8
3.5
0.9
1.8
Maximum Overcurrent
Protection Device, Amps
15
15
15
15
NOTE
Liebert Lee-Temp condensers require a separate line voltage electrical supply for the heated
receivers. See Table 8-5 for power requirements.
8.4 Liebert MC Condenser Electrical Field Connections
Condenser-rated voltage should be verified with available power supply before installation. Refer to the
unit’s electrical schematic and serial tag for specific electrical requirements.
Line voltage electrical service is required for all condensers at the location of the condenser. The voltage
supply to the condenser may not be the same voltage supply as required by the indoor unit. Consider
using UPS equipment on both data center cooling units and Liebert MC condensers to maintain
uninterrupted cooling capability. Refer to the unit’s serial tag for specific condenser electrical requirements.
A unit disconnect is standard. However, a site disconnect may be required per local code to isolate the unit
for maintenance. Route the supply power to the site disconnect switch and then to the unit. Route the
conduit to the knockout provided in the bottom right end of the electrical control enclosure. Connect the
earth ground wire lead to the marked earth ground connection terminal provided near the factory-installed
disconnect switch (see Figure 8-3).
NOTE
Liebert Lee-Temp™ kits require a separate line voltage electrical supply for the heated receivers.
See Table 8-6 for power requirements.
77
Liebert® CRV™ System Design Manual
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
Figure 8-3 MC Condenser typical connections, Premium Efficiency Control
FAN2
Lee-Temp receiver tank (1 per circuit).
FAN1
NOTE: Heater pad voltage available for
FAN 2
120V/1 phase/60 Hz or 230V/1 phase/60Hz
150 or 300 Watt, varies by condenser.
Electrical connection box with cover.
(Cover removed for clarity.)
FAN 1
Electrical service connection. Pigtails in electric handy box
are factory wired to Lee-Temp heater pads for field connection
of separate continuous electric source, wire not by Liebert.
8
10
SH
12
9
13
70
71
230
DPN002169
Rev. 7
8.4.1
DPN002674
Rev. 6
Key Electrical Details—Typical Connections,
Premium Efficiency Control
Source: DPN002169, Rev. 7, Pg. 1 – 3
1. Three-Phase Electrical Service—Terminals are on top of disconnect switch for one-fan and two-fan
units. Terminals are on bottom of disconnect switch for three-fan and four-fan units. Three-phase
service not by Emerson. See Note 5.
2. Earth Ground—Field lug terminal for earth ground connection. Ground terminal strip for fan motor
ground connection.
3. Primary High-Voltage Entrance—Two knockouts, each 7/8” (22.2 mm) diameter, at the bottom of the
enclosure.
Liebert® CRV™ System Design Manual
78
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
4. SPD Field Connection Terminals—High-voltage surge protective device (SPD) terminals. SPD is an
optional device.
5. CANbus Terminal Connections—Field terminals for CANbus cable connection.
• 5A is the CANbus connectors.
• TB49-1 is the input terminal for CANbus high.
• TB49-3 is the input terminal for CANbus low.
• TB50-1 is output terminal for CANbus high.
• TB50-3 is the output terminal for CANbus low.
• Each CANbus cable shield is connected to terminal “SH”, Item 9.
• 5B is the “END OF LINE” jumper.
• 5C is the CANbus “DEVICE ADDRESS DIP SWITCH”. CANbus cable not by Emerson. See
Note 2.
6. Remote Unit Shutdown (optional)—Replace existing jumper between terminals TB38-1 and TB38-2
with field-supplied normally closed switch having a minimum 75VA 24VAC rating. Use field-supplied
Class 1 wiring.
7. Alarm Terminal Connections
a. Common Alarm Relay indicates when any type of alarm occurs. TB74-1 is common, TB74-2 is
normally open and TB74-3 is normally closed. 1 Amp 24VAC is the maximum load. Use
field-supplied Class 1 wiring.
b. Shutdown Alarm Relay indicates when condenser loses power, or when a critical alarm has
occurred that shuts down the condenser unit. TB74-4 is common; TB74-5 is normally open; and
TB74-6 is normally closed. 1 Amp 24VAC is the maximum load. Use field-supplied Class 1 wiring.
8. Indoor Unit Interlock and SPD Alarm terminals
a. On any call for compressor operation, normally open contact is closed across Terminals 70 and 71
for Circuit 1, and normally open contact is closed across Terminals 70 and 230 for Circuit 2 from
indoor unit.
b. During SPD alarm, normally open contact is closed across Terminals 12 and 13. SPD is an
optional device.
9. CANbus Shield Terminal—Terminal for field shield connection of the CANbus field-supplied cables.
The shield of CANbus field-supplied cables must not be connected to ground at the condenser.
10. Primary Low-Voltage Entrance—One knockout, 7/8” (22.2 mm) diameter that is free for customer
low-voltage wiring.
11. SPD Entrance—One 7/8” (22.2 mm) diameter knockout hole at the bottom of the enclosure.
High-voltage surge protective device (SPD) is optional.
Notes to MC Condensers Electrical Field Connections
Source: DPN002169, Rev. 7, Pg. 2 – 3
1. Refer to specification sheet for unit voltage rating, full load amp, and wire size amp ratings.
79
Liebert® CRV™ System Design Manual
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
2. The CANbus wiring is field supplied and must be:
• Conductors 22-18AWG stranded tinned copper
• Twisted pair (minimum four twists per foot [305mm])
• Braided shield or foil shield with drain wire
• Shield must be wired to ground at indoor unit
• Low capacitance (15pF/FT or less)
• UL-approved temperature rated to 167°F (75°C)
• UL-approved voltage rated to 300 V
• UV-resistant and moisture-resistant if not run in conduit
Examples: Belden part number 89207(plenum rated) or Alpha Wire part number 6454 (UV-resistant
outdoor rated) Category 5, 5e or higher.
3. Do not run the CANbus cable in the same conduit, raceway or chase as high voltage.
4. No special considerations are required when the total external cable connection between the indoor
unit and outdoor unit(s) is less than 450FT (137M). For total external cable connections greater than
450FT (137M) but less than 800FT (243M) a CANbus isolator is required.
5. All wiring must be sized and selected for insulation case per NEC and other local codes.
6. Do not bend cables to less than four times the diameter of the cable.
7. Do not deform cables when securing in bundles or when hanging them.
8. Avoid running the cables by devices that may introduce noise, such as machines, fluorescent lights
and electronics.
9. Avoid stretching cables.
10. Separate high volt wires and other high-voltage sources from CAN wires by 12 in.ches.
11. The electrically commutated (EC) motors included in the Liebert MC are suitable for connection to
power supplies with a solidly grounded neutral. (Some platforms can accept power supplies listed
under Item . Contact the factory for more information.)
NOTICE
Risk of improper input power. Can cause equipment damage.
The Liebert MC Condenser Small Platform (MCS028) with Premium EC Control is designed to
operate with Wye-connected power. It will NOT operate properly with delta-connected power.
MC Acceptable Power Supplies for 208-V to 575-V Nominal Units
• 208-V Wye with solidly grounded neutral and 120 V line to ground;
• 380V Wye with solidly grounded neutral and 220 V line to ground;
• 480-V Wye with solidly grounded neutral and 277 V line to ground.
• 575-V Wye with solidly grounded neutral and 332V line to ground. (uses step-down transformer)
MC Non-Acceptable Power Supplies for 208-V to 575-V Nominal Units
•
•
•
•
Wye with high resistance (or impedance) ground;
Delta without ground or with floating ground;
Delta with corner ground; or
Delta with grounded center tap
Liebert® CRV™ System Design Manual
80
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
8.4.2
Wye vs. Delta Connection Power Supply—
Liebert MCM and MCL Models with EC Fans
Condensers can operate on Wye or delta connection power supply.
Figure 8-4 Wye and delta power supply connection diagram
Wye Power Supply Connection
Delta Power Supply Connection
Phase A
Phase A
Winding
B
Phase B
Winding
A-B
Winding
C-A
Winding
A
Phase B
Neutral
Winding
C
8.4.3
Winding B-C
Phase C
Phase C
Wye vs. Delta Connection Power Supply—Small-platform
Liebert Condenser (MCS028) with Premium EC Control
NOTICE
Risk of improper input power. Can cause equipment damage.
The Liebert MC Condenser Small Platform (MCS028) with Premium EC Control is designed to
operate with Wye-connected power. It will NOT operate properly with delta-connected power.
Acceptable Power Supplies—208-V to 480-V Nominal Units - Small-platform Condenser
(MCS028) with Premium EC Control
• 208-V Wye with solidly grounded neutral and 120 V line-to-ground
• 380-V Wye with solidly grounded neutral and 220 V line-to-ground
• 480-V Wye with solidly grounded neutral and 277 V line-to-ground
Unacceptable Power Supplies—208-V to 480-V Nominal Units - Only Small-platform Condenser
(MCS028) with Premium EC Control
• Wye with high-resistance (or impedance) ground
• Delta without ground or with floating ground
• Delta with corner ground
• Delta with grounded center tap
NOTE
The Liebert MCS028 Premium EC Fan Model will not operate properly with delta-connected
power. A field-supplied isolation transformer or other power solutions will be needed to for proper
condenser function.
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Heat Rejection—Liebert MC™ and Fin/Tube Condensers
Figure 8-5 Wye and delta power supply connection diagram
Wye Power Supply Connection
Delta Power Supply Connection
Phase A
Phase A
Winding
B
Phase B
Winding
A-B
Winding
C-A
Winding
A
Phase B
Neutral
Winding
C
Liebert® CRV™ System Design Manual
Winding B-C
Phase C
Phase C
82
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
Figure 8-6 CANbus communication connection
Liebert CRV 600 mm (24 in.) and Liebert MC (premium) condenser
TB50
CAN H
CAN L
D58
CONDENSER
J6
L
1
2
3
J6 TERMINATION JUMPER
MUST BE SET TO PINS 1 AND 2.
P15
A
1
TB50
OUTPUT
B
H
P80
1
H
3
J4
TB49
1
2
3
L
INPUT
3
TB49
1
ON
3
J6
CANbus
ADDRESSING
SWITCH
CAN SW6
TB50
OUT P UT
1
2
3
CAN H
CAN L
TB49
INPUT
1
2
3
1
BOOTPSWDSYS APP
ON
CAN SW6
DETAIL1
CAN CABLE CONNECTION (A)
SHIELD CONNECTION
FACTORY WIRING BETWEEN
MC CONTROL BOARD AND
TERMINAL STRIP.
SH
A
B
LOW VOLTAGE FIELD ENTRANCE
LOCATED ON BOTTOM LEFT OF
CONDENSER ENCLOSURE.
70
71
230
B
HEAT REJECTION INTERLOCK WIRE
A
CANBUS COMMUNICATION CABLE
HEAT REJECTION INTERLOCK (B)
P78
1
3
P78 TERMINATION JUMPER
FACTORY SET TO PINS 2 AND 3,
FIELD MUST REMOVE JUMPER
AND REPLACE ON PINS 1 AND 2.
SHIELDED CONNECTION
PARTIAL VIEW SHOWN FOR CLARITY
FACTORY WIRING BETWEEN
ICOM & TERMINAL STRIP
PARTIAL VIEW SHOWN FOR CLARITY
83
DPN002841
Pg. 1 Rev. 4
Liebert® CRV™ System Design Manual
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
Figure 8-7 CANbus communication connection
Liebert CRV 300 mm (12 in.) and Liebert MC (premium) condenser
CAN L
TB50
CAN H
D58
J6
L
1
2
3
P15
A
1
TB50
OUTPUT
B
H
P80
J6 TERMINATION JUMPER
MUST BE SET TO PINS 1 AND 2.
CONDENSER
1
H
3
TB49
J4
L
CANbus
ADDRESSING
SWITCH
1
1
2
3
3
TB49
INPUT
ON
3
J6
CAN SW6
1
2
3
1
2
3
1
BOOTPSWD SYS APP
ON
CAN SW6
DETAIL1
CAN CABLE CONNECTION (A)
SHIELD CONNECTION
A
LOW VOLTAGE FIELD ENTRANCE
LOCATED ON BOTTOM LEFT OF
CONDENSER ENCLOSURE.
A CANbus CABLE CONNECTION
FACTORY WIRING BETWEEN
MC CONTROL BOARD AND
TERMINAL STRIP.
SH
B
70
71
230
B
HEAT REJECTION INTERLOCK
HEAT REJECTION INTERLOCK (B)
CRV300 INDOOR UNIT
SHIELD CONNECTION
PARTIAL VIEW SHOWN FOR CLARITY
P78
1
3
P78 TERMINATION JUMPER
FACTORY SET TO PINS 2 AND 3,
FIELD MUST REMOVE JUMPER
AND REPLACE ON PINS 1 AND 2.
FACTORY WIRING BETWEEN ICOM AND TERMINAL STRIP.
DPN003036
Rev. 2
CANbus communication component notes for a CRV 600 mm (24 in.) and CRV 300 (12 in.) unit system.
1. Component appearance, orientation and positioning may vary. Terminal names and callouts remain
constant.
2. All circuits to these connection points are Class 2.
Liebert® CRV™ System Design Manual
84
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
CAN and Cable Notes (A):
1. Field-supplied cable.
• Shielded
• 22 – 18 AWG stranded tinned copper
• Twisted pair (minimum 4 twists per foot)
• Low capacitance (15 pF/FT or less)
• Must be rated to meet all local codes and conditions.
• Examples Belden 89207 (plenum-rated), or Alpha Wire 6454 Category 5, 5E, or higher.
2. Do not run in same conduit, raceway, or chase as high-voltage wiring.
3. For CANbus network lengths greater than 350 ft. (107 m), contact Liebert factory.
Interlock Wire Notes (B):
1. Field-supplied wire
• 18 AWG or greater
• Rated 600 V
2. Run two wires from indoor unit to condensers.
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Liebert® CRV™ System Design Manual
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
8.5 Liebert MC Condenser Piping Guidelines
Indoor units and condensers both ship with holding charges of inert gas. Do not vent the condenser until all
refrigerant piping is in place, ready for connection to indoor unit and condenser.
Refer to Figure 6-1 and Figure 6-2 along with the following guidelines.
• Use copper piping with a brazing alloy with a minimum temperature of 1350°F (732°C), such as SilFos. Avoid soft solders such as 50/50 or 95/5.
• Use a flow of dry nitrogen through the piping during brazing to prevent formation of copper oxide scale
inside the piping. When copper is heated in the presence of air, copper oxide forms. POE oil will
dissolve these oxides from inside the copper pipes and deposit them throughout the system, clogging
filter driers and affecting other system components.
• A pure dry nitrogen flow of 1-3 ft3/min (0.5-1.5 l/s) inside the pipe during brazing is sufficient to displace
the air. Control the flow using a suitable metering device.
• Ensure that the tubing surfaces to be brazed are clean and that the ends of the tubes have been
carefully reamed to remove any burrs.
• Ensure that all loose material has been cleaned from inside the tubing before brazing.
• Protect all refrigerant line components within 18" (460 mm) of the brazing site by wrapping them with
wet cloth or suitable heat sink compound.
• Isolate piping from building using vibration isolating supports.
• Refer to the indoor unit’s user manual for appropriate piping sizes.
• Install traps on the hot gas (discharge) lines at the bottom of any rise over 5 feet high. If the rise
exceeds 25 feet (7.5 m), then install a trap in 20 foot (6 m) increments or evenly divided.
• Pitch horizontal hot gas piping down at a minimum rate of 1/2” per 10 ft. (42mm per 10 m) so that
gravity will aid in moving oil in the direction of refrigerant/oil flow.
• Consult factory if Liebert Lee-Temp™ condenser is below the evaporator or if a condenser not
equipped with Liebert Lee-Temp is more than 15 ft (4.6 m) below the evaporator.
• Consult factory if piping run exceeds 150 feet (46 m) equivalent length on traditional DX units.
• Consult factory if piping run exceeds 300 feet (91 m) actual length, or 450 feet (137 m) equivalent
length on units installed with Liebert EconoPhase™ units.
• Record linear length of liquid and discharge line required from the indoor unit to the condenser
accurately for calculating refrigerant requirements.
• Keep piping clean and dry, especially on units with POE oil (R407C, R410A or R22 refrigerant).
• Avoid piping runs through noise-sensitive areas.
• Do not run piping directly in front of indoor unit discharge air stream.
• Refrigerant oil – do not mix oil types or viscosities. Consult indoor unit for refrigerant type and oil
requirements.
NOTE
Failure to use compressor oils recommended by compressor manufacturer will void compressor
warranty. Consult Emerson or the compressor manufacturer for further recommendations or if you
have questions about compressor oils.
Refer to ASHRAE Refrigeration Handbook for general good practices for refrigeration piping. The
Liebert indoor cooling unit has a factory-installed high-pressure safety switch in the high side
refrigerant circuit. A pressure relief valve is provided with Liebert Lee-Temp™ receivers. A fusible
plug is factory installed in the Liebert DSE™ receivers. Consult local building codes to determine if
condensers without receivers will require field-provided pressure relief devices. A fusible plug kit is
available for field installation.
Liebert® CRV™ System Design Manual
86
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
One discharge line and one liquid line must be field-installed for each circuit of the indoor unit and the
outdoor condenser(s). Dual circuit condensers are available for most dual circuit indoor unit applications.
Refer to Figures 8-8 and 8-9 for additional field-installed piping needed at the condenser. This piping is
needed for proper system performance and for installation/interconnecting receivers and head pressure
control valves for Liebert Lee-Temp™ systems.
NOTE
Keep the evaporator unit and condenser closed with their factory charge of inert gas while all field
piping is installed. Keep the field piping clean and dry during installation, and do not allow it to
stand open to the atmosphere.
When all the field interconnecting piping is in place, vent the condenser’s inert gas charge and
connect to the field piping. Finally, vent the evaporator unit’s charge of inert gas and make its
piping connection last.
Keep accurate length measurements of field piping for estimating system charge.
Follow all proper brazing practices, including a dry nitrogen purge to maintain system cleanliness.
The condenser connection pipes must be wrapped with a wet cloth to keep the pressure and
temperature sensors cool during any brazing.
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Liebert® CRV™ System Design Manual
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
Figure 8-8 Liebert MC piping—Single-circuit
COVER*
LEAVING LIQUID
LINE
INVERTED TRAPS
ARE FACTORY PROVIDED
INSIDE CONDENSER
ENTERING HOT
GAS LINE
FIELD PIPING
VERTICAL
OPTIONAL FUSIBLE PLUG SERVICE KIT TO BE BRAZED INTO THE LIQUID LINE(S) IN
EITHER THE VERTICAL OR HORIZONTAL POSITION. (WHERE REQUIRED)
HORIZONTAL
DETAIL A
(VERTICAL POSITION IS PREFERRED, HORIZONTAL POSITION IS OPTIONAL.)
HORIZONTAL
VERTICAL
LEAVING LIQUID
LINE
MCS028 ONLY
ENTERING HOT GAS LINE
* SHIPPING COVER IS NOT NECESSARY FOR PROPER CONDENSER OPERATION AND
MAY BE RECYCLED IF FIELD PIPING INTERFERES WITH PROPER REATTACHMENT.
Table 8-7
Model No.
MC single-circuit piping sizes
Number
of Fans
Connection Sizes, OD, In
Hot Gas Line
Liquid Line
MCS028
1
7/8
5/8
MCM040
1
7/8
5/8
MCM080
2
1-1/8
7/8
MCL055
1
1-1/8
7/8
MCL110
2
1-3/8
1-1/8
Source: DPN002166, Rev. 3
Liebert® CRV™ System Design Manual
88
DPN002166
Rev. 3
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
Figure 8-9 Liebert MC piping—Single-circuit with Liebert Lee-Temp™
HOT GAS LINE
TO CONDENSER
ENTERING HOT
GAS LINE
COVER *
B VIEW
METAL CLAMP
POSITION ELBOW TO
DIRECT RELIEF VALVE
DOWNWARD
FASTEN HOT GAS LINE TO CABINET
USING FLAT SURFACE CLAMPS WITH
ISOLATORS(FIELD SUPPLIED)
SEE DETAIL A-A
B VIEW
ISOLATOR
DETAIL A
FIELD PIPING
LIQUID LINE
FROM CONDENSER
LEAVING
LIQUID LINE
GENERAL ARRANGEMENT
LIEBERT SUPPLIED PIPING ASSEMBLY
WILL INCLUDE 1 TO 3 HEAD PRESSURE
VALVES AND CHECK VALVES DEPENDENT
ON CONDENSER CAPACITY AND REFRIGERANT.
NOTE:
1.THE FOLLOWING MATERIALS ARE SUPPLIED BY LIEBERT,SHIPPED LOOSE FOR EACH CIRCUIT AND FOR FIELD INSTALLATION:
INSULATED LEE-TEMP RECEIVER TANK WITH ELECTRIC HEATER PADS AND SIGHT GLASSES, PIPING ASSEMBLY WITH HEAD PRESSURE
CONTROL VALVE AND CHECK VALVE, ROTO-LOCK VALVE AND PRESSURE RELIEF VALVE. ALL OTHER PIPING AND ELECTRICAL WIRING
TO BE SUPPLIED AND INSTALLED BY OTHERS. ADDITIONAL CONDENSER LEG PER CIRCUIT WHEN REQUIRED, SHIPS WITH THE CONDENSER.
* SHIPPING COVER IS NOT NECESSARY FOR PROPER CONDENSER OPERATION AND
MAY BE RECYCLED IF FIELD PIPING INTERFERES WITH PROPER REATTACHMENT.
Table 8-8
DPN002167
Rev. 6
Liebert MC piping connection sizes—Single-circuit condensers with Liebert Lee-Temp
Condenser
Connections, OD.In
Liebert Lee-Temp Connections
Liquid Line to
Liebert Lee-Temp
Valve, ODS, In.
Receiver Out
Rotalock
IDS In.
5/8
Model #
Hot Gas
Liquid
Hot Gas Tee
IDS In.
MCS028
7/8
5/8
7/8
5/8
MCM040
7/8
5/8
7/8
5/8
5/8
MCM080
1-1/8
7/8
1-1/8
7/8
1-1/8
MCL055
1-1/8
7/8
1-1/8
7/8
7/8
MCL110
1-3/8
1-1/8
1-3/8
1-1/8
1-1/8
Source: DPN002167, Rev. 5
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Liebert® CRV™ System Design Manual
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
Table 8-9
Recommended refrigerant-line sizes for Liebert MC condensers with R-410A,
with and without Liebert Lee-Temp™, Cu, OD
Liebert CRV
Model #
Total Equivalent
Length, ft. (m)
Hot Gas Line,
in. (m)
Liquid Line,
in. (m)
50 (15)
3/4 (19.1)
5/8 (15.9)
100 (30)
3/4 (19.1)
5/8 (15.9)
150 (45)
3/4 (19.1)
CR019RA/
CR020RA
300 (91)
CR035RA
7/8 (22.2)
5/8 (15.9)
1
3/4 (19.1)
50 (15)
7/8 (22.2)
3/4 (19.1)
100 (30)
7/8 (22.2)
3/4 (19.1)
150 (45)
7/8 (22.2)
300 (91)
1-1/8 (28.6)
3/4 (19.1)
1
7/8 (22.2)
Consult factory for proper line sizing for runs longer than 300 ft. (91.4 m) equivalent length.
1. Must downsize vertical riser one trade size (1-1/8” to 7/8” or 7/8” to 3/4”).
Source: DPN000788, Rev. 1
8.6 Fin/Tube Condenser Selections—600 mm (24 in.)
8.6.1
Variable-frequency Drive Fin/Tube Condensers
with and without Liebert Lee-Temp™
The fin/tube condensers are designed for operation in outdoor ambient temperatures ranging from -20°F to
115°F (-29 to 46°C). The Liebert Lee-Temp models provide operation in colder outdoor environments
ranging from -30°F to 115°F (-34 to 46°C).
Table 8-10 Traditional open room return air conditions
Ambient Temperature Selection
95°F (35°C) Standard Selection
Model No.
CR020A
CR035A
100°F - 115° (38°C-46°C)
Unit
Width
VFD Units
Units with
Liebert Lee-Temp
VFD Units
Units with
Liebert Lee-Temp
600 mm
(24 in.)
TCSV28K
TCSV60K
DCSL28K
DCSL60K
TCSV60K
TCSV90K
DCSL60K
DCSL90K
Liebert® CRV™ System Design Manual
90
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
8.7 Fin/Tube Condensers Dimensions and Weights
Figure 8-10 Cabinet and anchor dimensions—Fin/Tube condenser with Lee-Temp™
A
43 1/8"
1095mm
37 7/8"
962mm
18"
458mm
C
1 3/4"
44mm
1 7/8"
48mm
1 3/4"
44mm
A
9/16"
14mm
Typ.
4 1/4"
108mm
1"
25mm
B
1"
25mm
4 1/4"
108mm
37 11/16"
957mm
39 7/16"
1002mm
41 3/16"
1046mm
43 3/16"
1097mm
1 7/8"
48mm
Anchor Plan
DETAIL A
DPN001623
Pg. 2 Rev. 8
Model No.
# of
Fans
# of
Legs
A
in. (mm)
B
in. (mm)
C
in. (mm)
Net Weight
lb. (kg)
DCSL28K
1
4
51-1/2 (1308)
42 (1067)
—
325 (147)
DCSL60K
2
6
91-1/2 (2324)
42 (1067)
82 (2083)
475 (215)
DCSL90K
3
6
131-1/2 (3340)
42 (1067)
124 (3150)
675 (306)
Source DPN001623, Rev. 8, Pg. 2
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Liebert® CRV™ System Design Manual
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
Figure 8-11 Cabinet and anchor dimensions—Fin/tube condenser with VFD-control
A
43 1/8"
1095mm
37 7/8"
962mm
18"
458mm
1 3/4"
44.5mm
1"
25.4mm
B
4 1/4"
108.0mm
C
1 7/8"
48mm
1 3/4"
44.5mm
O
9/16"
14.3mm
ELECTRIC
BOX
END
37 11/16"
957mm
39 7/16"
1002mm
41 3/16"
1046mm
43 3/16"
1097mm
4 1/4"
108.0mm
UNIT ANCHOR PLAN
1 7/8"
48mm
A
B
C
Net Weight
Model No.
# of
Fans
In. (mm)
In. (mm)
In. (mm)
lb. (kg)
TCSV28K
1
51-1/2 (1308)
44 (1118)
42 (1067)
325 (148)
TCSV60K
2
91-1/2 (2324)
84 (2134)
82 (2083)
470 (213)
TCSV90K
3
(131-1/2 (3340)
124 (3150)
122 (3099
670 (304)
Source: DPN001624, Rev. 9
Liebert® CRV™ System Design Manual
92
DPN001624
Pg. 2 Rev. 9
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
8.8 Fin/Tube Condenser Electrical Field Connections
Table 8-11 Electrical data—60-Hz fin/tube condenser
Model #
28K
60K
90K
# of Fans
1
2
3
Input Voltage
ph
FLA
WSA
OPD
FLA
WSA
OPD
FLA
WSA
OPD
3.7
4.6
15
7.2
8.1
15
10.7
11.6
15
1.8
2.3
15
3.5
4.0
15
5.2
5.7
15
VFD Controlled
208/230
460
Liebert Lee-Temp
3
™
208/230
460
575
3
Controlled/Fan-Cycling
3.5
4.4
15
7.0
7.9
15
10.5
11.4
15
1.7
2.1
15
3.4
3.8
15
5.1
5.5
15
1.4
1.8
15
2.8
3.2
15
4.2
4.6
15
FLA = Full Load Amps; WSA = Wire Size Amps; OPD = Maximum Overcurrent Protection Device
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Liebert® CRV™ System Design Manual
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
Figure 8-12 Fin/tube condenser electrical field connections—R-410A, VFD-control
Note:
Refer to specification sheet
for full load amp and wire
size amp ratings
Factory wired to 24V
control circuit.
Factory installed fuse block on
60 HZ units.
Heat Rejection Connection 70, 71
Field supplied
Class 1 wiring to
interlock condenser 24V
controls to Liebert indoor
unit (70, 71). Reference the
condenser and indoor unit
electrical schematics for
termination. 7/8 in (22.2mm)
diameter hole provided in
bottom of electric box.
Electric Service Connection
terminals with factory
supplied disconnect.
70
71
11
12
13
14
V
F
D
SPD
HEA
TER
Heater Kit Connection
Field supplied Class 1 wiring to
optional heater kit from condenser
fuse block. Reference the heater kit
and condenser electrical schematics
for termination.
Special Alarm Connections
Field supplied 24V class 1
wiring to remote alarm circuits
Surge Suppression Device (SPD)
normally open alarm contact
connections (11, 12).
Variable Frequency Drive (VFD)
normally closed alarm contact
connections (13, 14). Reference
the indoor unit electric diagram
(RAD1-4) for termination.
Liebert® CRV™ System Design Manual
Factory installed disconnect
switch.
Electric Service Entrance.
A 7/8 in. (22.2mm) diameter hole in
a 1 1/18 in. (28.6mm) knockout
provided in bottom of electric box.
Electric Service, not by Liebert.
Factory wired to components on
electric panel.
94
Earth ground connection (60 HZ)
Connection terminal for field
supplied earth grounding wire
when factory disconnect is supplied.
DPN001624
Pg. 4 Rev.10
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
Figure 8-13 Fin/Tube condenser piping—R-410A, single-circuit with Liebert Lee-Temp™
METAL CLAMP
ISOLATOR
DETAIL A-A
DISCHARGE LINE FROM
UNIT (FIELD SUPPLIED)
DISCHARGE LINE
FROM UNIT
(FIELD SUPPLIED)
LIQUID RETURN LINE TO
UNIT (FIELD SUPPLIED)
INVERTED TRAP
(FIELD SUPPLIED)
TO EXTEND A MINIMUM OF 7-1/2"
ABOVE COIL BASE.
POSITION ELBOW TO DIRECT
RELIEF VALVE DOWNWARD
FASTEN LIQUID AND HOT GAS LINES
TO LEG USING FLAT SURFACE CLAMPS
WITH ISOLATORS (FIELD SUPPLIED).
SUPPORT FIELD PIPING SEPARATELY
TO AVOID COIL DAMAGE AND LOSS OF
CHARGE.
SEE DETAIL A-A
LIQUID RETURN
LINE TO UNIT
(FIELD SUPPLIED)
POSITION ELBOW TO DIRECT
RELIEF VALVE DOWNWARD
THE FOLLOWING MATERIALS ARE SUPPLIED BY LIEBERT
FOR EACH CIRCUIT (SHIPPED LOOSE WITH CONDENSER)
FOR FIELD INSTALLATION: INSULATED LEE-TEMP
STORAGE TANK WITH TWO SIGHT GLASSES, HEAD
PRESSURE CONTROL VALVE, CHECK VALVE, ROTO-LOCK
VALVE, AND PRESSURE RELIEF VALVE. ALL OTHER
PIPING TO BE SUPPLIED AND INSTALLED BY OTHERS.
HOT GAS LINE (FIELD SUPPLIED)
DPN001623
Pg. 3 Rev. 8
LIQUID LINE (FIELD SUPPLIED)
Condenser Piping Connection Sizes
Condenser Connections, O.D., in.
Condenser Model #
Hot Gas
Liquid
DCSL28K
DCSL60K
Liebert Lee-Temp Connections, I.D., in.
Liebert Lee-Temp
Size, in. (mm)
Hot Gas
Tee
Liquid to
L-T Valve
Receiver
Out
7/8
5/8
7/8
9 x 36 (229 x 914)
1-1/8
7/8
DCSL90K
11 x 36 (279 x 914)
11 x 48 (279 x 1219)
Source DPN001623, Pg. 3, Rev. 8
8.9 Fin/Tube Condenser Standard Features—
Air-cooled, R-410A with Lee-Temp™ Control
Source DPN001623, Pg. 1, Rev. 8
Coil—constructed of copper tubes in a staggered tube pattern. Tubes are expanded into continuous,
rippled or enhanced aluminum type fins. The fins have full depth fin collars completely covering the copper
tubes which are connected to heavy wall type L headers. Inlet coil connector tubes pass through relieved
holes in the tube sheet for maximum resistance to piping strain and vibration. Coils are factory leak tested
at a minimum of 475 PSIG, dehydrated, then filled and sealed with an inert gas holding charge for
shipment.
Fan(s)—Blades are constructed of aluminum, with a diameter of 26 inches and secured to the fan shaft by
a heavy duty painted steel hub with set screw. Fan guards are heavy gauge, close meshed, steel wire with
corrosion resistant finish. Fans are factory balanced and tested before shipment.
Fan Motor(s)—Are provided with rain slingers, permanently lubricated bearings, and individual built-in
overload protection. Motors are rigidly mounted on die-formed galvanized steel supports.
95
Liebert® CRV™ System Design Manual
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
Head Pressure Control—A Liebert Lee-Temp control system is furnished for each circuit and consists of
an insulated, heated receiver tank with sight glasses, pressure relief valve, roto lock valve, and head
pressure operated 3-way valve for field connection to air cooled condenser. This system allows operation
at ambient conditions as low as -30°F (-34°C).
Housing—The condenser housing is constructed of bright aluminum sheet and divided into individual fan
sections by full width baffles. Structural support members, including coil support frame, motor, and drive
support, are galvanized steel for strength and corrosion resistance. Aluminum legs are provided with
rigging holes for hoisting the unit into position.
Unit Disconnect Switch—A locking disconnect factory installed and wired in enclosed condenser control
section.
Electrical Controls—Electrical controls, overload protection devices and service connection terminals are
provided and factory wired inside the integral NEMA 3R electrical panel section of the housing. Only
supply wiring and indoor unit interlock wiring are required at condenser installation.
8.10 Fin/Tube Condenser Features—R-410A with VFD Control
8.10.1 Fin/Tube Condenser Standard features
Source: DPN001624, Pg. 1, Rev. 9
Coil—The coil is constructed of copper tubes in a staggered tube pattern. Tubes are expanded into
continuous, rippled or enhanced aluminum type fins. The fins have full depth fin collars completely
covering the copper tubes which are connected to heavy wall type L headers. Inlet coil connector tubes
pass through relieved holes in the tube sheet for maximum resistance to piping strain and vibration. Coils
are factory leak tested at a minimum of 475 PSIG, dehydrated, then filled and sealed with an inert gas
holding charge for shipment.
Fans—Blades are constructed of zinc plated steel or aluminum with a diameter of 26 inches and secured
to the fan shaft by a heavy duty hub with set screw. Fan guards are heavy gauge, close meshed, steel wire
with corrosion resistant finish. Fans are factory balanced and tested before shipment.
Fan Motors—The variable speed fan motor is a specifically designed inverter duty motor with permanently
lubricated ceramic bearings. The Liebert variable frequency drive (VFD) control system provides overload
protection for the variable speed motor. Each ambient-temperature-controlled fan motor has built-in
overload protection. All motors have rain slingers, permanently lubricated bearings and are rigidly mounted
on die-formed galvanized steel supports.
Head Pressure Control—The Liebert VFD Condenser control system is complete with variable frequency
drive (VFD), inverter duty fan motor operating from 0% to 100% motor RPM based on head pressure,
refrigerant pressure transducers, ambient-temperature thermostat(s), motor overload protection, and
electrical control circuit factory wired in the control panel. VFD control is always furnished on the fan
adjacent to the connection end of the condenser which runs continuously with the compressors. Other
condenser fans are controlled by ambient thermostats and are either “on” or “off”. This system allows for
operation at ambient conditions as low as 0°F (-17.8°C).
Housing—The condenser housing is constructed of bright aluminum sheet and divided into individual fan
sections by full width baffles. Structural support members, including coil support frame, motor, and drive
support, are galvanized steel for strength and corrosion resistance. Aluminum legs are provided with
rigging holes for hoisting the unit into position.
SPD and Unit Disconnect Switch—Surge Protective Device and locking disconnect are factory installed
and wired in enclosed condenser control section.
Alarm Contacts—Normally open dry contacts provided for indication of VFD and SPD alarm condition.
Liebert® CRV™ System Design Manual
96
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
8.10.2 Fin/Tube Condenser Optional Features
Source DPN001624, Pg. 1, Rev. 9
Fusible Plug Service Kit—Provides compliance for local codes requiring fusible-plug-type pressure relief
devices. Shipped loose for field installation on each liquid line.
Low Ambient VFD Heater Kit—Thermostatically controlled heater provides additional heat to electrical
box at low ambient to allow VFD cold start-ups and continuous operation. Field installed kit is powered
from condenser power block and extends condenser operation to ambient conditions as low as -20ºF (28.9ºC).
97
Liebert® CRV™ System Design Manual
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
8.11 Fin/Tube Condensers—Piping
Figure 8-14 General arrangement with condenser—Air-cooled, 600 mm (24 in.),
Fin/Tube condenser with and without Liebert Lee-Temp™
OUTDOOR VFD CONDENSER
OUTDOOR LEE-TEMP CONDENSER
Head Pressure
Control Valve
Optional Field Installed
Fusible Plug
VFD Transducer
Condenser Coil
(VFD)
Check Valve
Condenser Coil
(Lee-Temp)
Relief Valve
Lee-Temp Receiver
Liquid Return
Hot Gas Discharge
Hot Gas Discharge
Liebert CRV Unit and associated Piping
Filter
Drier
Sight
Glass
Solenoid
Valve
Expansion
Valve
Distributor
Evaporator Coil
External Equalizer
Service Valve
High Pressure
Transducer
Sensing
Bulb
CR020 Digital
Solenoid Valve
* For rises over
25ft (7.6m), trap
every 20ft (6m)
or evenly divided.
Vibration Absorber
High Pressure
Cut Out
Suction Line
Low Pressure Transducer
CR035 Digital
Solenoid Valve
Digital Scroll
Compressor
Service Valve
Hot Gas Discharge
Vibration Absorber
Check Valve
Isolation Valve
*Isolation Valve
*Isolation Valve
Liquid Return
FACTORY REFRIGERANT PIPING
FIELD PIPING
SERVICE / SCHRADER (ACCESS) CONNECTION NO VALVE CORE
SERVICE / SCHRADER (ACCESS) CONNECTION WITH VALVE CORE
NOTES:
1. SCHEMATIC REPRESENTATION SHOWN. DO NOT USE FOR SPECIFIC CONNECTION LOCATIONS.
2. ONE OR MORE ADDITIONAL PRESSURE RELIEF VALVES ARE REQUIRED DOWNSTREAM OF ANY
AND ALL FIELD-INSTALLED ISOLATION. DO NOT ISOLATE ANY REFRIGERANT CIRCUITS FROM
OVERPRESSURIZATION PROTECTION.
Liebert® CRV™ System Design Manual
98
* Components are not supplied by
Liebert but are required for
proper circuit operation and
maintenance. Should be located
near the indoor Liebert CRV unit.
+ Inverted Trap on Discharge and
Liquid Lines to extend above the
base of the coil by a minimum of
190mm (7-1/2").
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
Figure 8-15 Fin/Tube condenser piping—R-410A, Single-circuit, VFD-control
METAL CLAMP
ISOLATOR
DETAIL A-A
ENTERING HOT GAS LINE
(FIELD SUPPLIED)
TRAPS (FIELD SUPPLIED) TO EXTEND
ABOVE BASE OF COIL BY A MINIMUM
OF 7-1/2" (191mm)
VERTICAL
LEAVING LIQUID LINE
(FIELD SUPPLIED)
HORIZONTAL
FASTEN LIQUID AND HOT GAS LINES TO
LEG USING FLAT SURFACE CLAMPS
WITH ISOLATORS (FIELD SUPPLIED).
SUPPORT FIELD PIPING SEPARATELY
TO AVOID COIL DAMAGE AND LOSS OF
CHARGE.
DETAIL A-A
OPTIONAL FUSIBLE PLUG SERVICE KIT TO
BE BRAZED INTO THE LIQUID LINE(S) IN
EITHER THE VERTICAL OR HORIZONTAL
POSITION. (WHERE REQUIRED)
(VERTICAL POSITION IS PREFERRED,
HORIZONTAL POSITION IS OPTIONAL.)
DPN001624
Pg. 3 Rev. 10
Condenser Piping Connection Sizes, Cu, O.D.
Condenser Model #
Entering Hot Gas
Line, in. (mm)
Returning Liquid
Line, in. (mm)
Weight, lb. (kg)
TCSV28K
1-1/8 (28.6)
7/8 (22.2)
325 (148)
TCSV60K
1-1/8 (28.6)
7/8 (22.2)
470 (213)
TCSV90K
1-1/8 (28.6)
7/8 (22.2)
670 (304)
Interconnection piping (field-supplied and installed) required. Configure piping for parallel
refrigerant flow between condenser sections.
Source DPN001624, Rev. 9, Pp. 2 and 3
Table 8-12 Recommended refrigerant-line sizes for Liebert MC condensers with R-410A,
with and without Liebert Lee-Temp™, Cu, OD
Liebert CRV
Model #
CR019RA/
CR020RA
Total Equivalent
Length, ft. (m)
Hot Gas Line,
in. (m)
Liquid Line,
in. (m)
50 (15)
3/4 (19.1)
5/8 (15.9)
100 (30)
3/4 (19.1)
5/8 (15.9)
150 (45)
3/4 (19.1)
300 (91)
CR035RA
7/8 (22.2)
1
5/8 (15.9)
3/4 (19.1)
50 (15)
7/8 (22.2)
3/4 (19.1)
100 (30)
7/8 (22.2)
3/4 (19.1)
150 (45)
7/8 (22.2)
3/4 (19.1)
300 (91)
1-1/8
(28.6) 1
7/8 (22.2)
Consult factory for proper line sizing for runs longer than 300 ft. (91.4 m) equivalent length.
1. Must downsize vertical riser one trade size (1-1/8” to 7/8” or 7/8” to 3/4”).
Source: DPN000788, Rev. 1
99
Liebert® CRV™ System Design Manual
Heat Rejection—Liebert MC™ and Fin/Tube Condensers
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Liebert® CRV™ System Design Manual
100
Heat Rejection—Liebert Drycoolers
9.0 Heat Rejection—Liebert Drycoolers
9.1 Drycoolers for Water/Glycol-cooled Liebert CRVs
Liebert Drycoolers are designed to work with the Liebert CRV. The Drycoolers provide glycol to the Liebert
CRVs internal high-efficiency brazed plate condenser to maintain proper condensing temperatures.
Ethylene or Propylene glycol must be added to the water loop to prevent freezing during low outdoor
temperatures. Figure 9-1 shows the percentage of ethylene glycol that should be added based on the
minimum outdoor temperature. If the Liebert CRV is attached to an open water loop (cooling tower, city
water, etc.) a field-supplied 16-20 mesh strainer is to be installed (not supplied by Emerson) within 10 ft
(30 m) upstream of the unit to prevent debris from entering the unit.
Table 9-1
CRV Model
Glycol-cooled drycooler matchups
Outdoor
Temperature,
°F (°C)
# Fans
Models 1
Pump HP 2
95 (35)
1
DSO112*8
S1.5*
Suggested
19kW
and
20kW
100 (38)
2
DSO174*8
S1.5*
105 (41)
2
DSO225*16
S2*
95 (35)
2
DSO197*16
S2*
35kW
100 (38)
3
DSO310*16
S2*
105 (41)
4
DSO419*16
S3*
*
= A (460 V / 3 f / 60 Hz) –or– Y (208/230 V / 3 ph / 60 Hz) –or– B (575 V / 3 ph / 60
Hz)
1. Match-ups sized for 40% propylene glycol, one-CRV, one-pump and one-drycooler
systems. Fuses and overloads not included with drycoolers. Liebert pump packages
are shipped with needed drycooler fuses and overloads or they will need to be
field-supplied for field-supplied pumps.
2. Suggested pump selections provide at least 30ft H2O head for piping losses
101
Liebert® CRV™ System Design Manual
Heat Rejection—Liebert Drycoolers
Figure 9-1 Percentage of ethylene glycol mixed with water
40%
35%
30%
25%
20%
15%
10%
5%
0%
32
(0)
23
(-5)
5
(-15)
14
(-10)
-4
(-20)
-13
(-25)
Temperature, °F (°C)
Percent in Weight
Percent in Volume
NOTICE
Risk of freezing fluid mixture. Can cause equipment damage.
The water supply/loop must be checked periodically for proper glycol mixture content. For safety,
calculate the percentage for protection at least 9°F (5°C) below the minimum ambient design
temperature.
Liebert® CRV™ System Design Manual
102
Heat Rejection—Liebert Drycoolers
9.2 Drycooler Dimensional Data and Weights
Figure 9-2 Cabinet and anchor dimensions for direct drive Drycoolers
43 1/8"
1095mm
TOP OF
FAN GUARD
43 9/16"
1107mm
A minimum clearance of 36" (914mm)
is recommended on all sides for proper
operation and component access.
Eyebolts for lifting Condenser
provided on 4 fan models only
Inlet Connection
(upper header)
A
70"
1778mm
Typ.
37 7/8"
962mm
9"
229mm
30 1/2"
775mm
11 1/2"
292mm
Outlet Connection
(lower header)
4 3/4"
121mm
EXPANSION TANK
Disconnect
Switch
B
4 1/4"
108mm
1"
25mm
43 3/16"
1097mm
C
B
1 3/4"
44mm
1 3/4"
44mm
D
1 7/8"
48mm
6"
A
37 11/1
957mm
1/2" (13mm)
Anchor Bolts (Typ.)
4 legs furnished for 1, 2, 3, & 4 fan models
6 legs furnished for 4 fan models
Model # # of
Note 2 Fans
-112
-174
-197
-225
-310
-419
1
2
3
4
4 1/4"
108mm
9/16"
14mm
Typ.
1 7/8"
48mm
1"
25mm
DETAIL A
Unit Anchor Plan
A
in (mm)
B
in (mm)
C
in (mm)
51-1/2 (1308)
44 (1118)
42 (1067)
DPN000274
Rev. 2
D
in (mm)
CFM (l/s)
60 Hz
Note 1
—
6088 (2873)
—
13265 (6261)
91-1/2 (2324) 84 (2134) 82 (2083)
—
12645 (5968)
—
12177 (5748)
131-1/2 (3340) 124 (3150) 122 (3099)
—
18965 (8951)
171-1/2 (4356) 164 (4166) 82 (2083) 80 (2032) 23650 (11163)
CFM (l/s)
50 Hz
Note 1
5074 (2394)
11054 (5217)
10535 (4973)
10147 (4789)
15804 (7459)
19708 (9302)
Internal
Volume
gal. (L)
Net
Weight
lb. (kg)
5.8 (22.0) 470 (213)
6.9 (26.2) 605 (274)
9 (34)
645 (293)
11.1 (42.1) 685 (310)
13.1 (49.6) 886 (402)
17.4 (65.9) 1120 (508)
1. All drycooler fan motors are 3/4 HP
2. DSO model prefix indicates control section in the drycooler includes controls for a single-pump package.
DDO model prefix indicates control section in the drycooler includes controls for a dual-pump package.
DSF model prefix indicates control section in the drycooler includes controls for a single-pump package on a fan-speed control drycooler.
DNT model prefix indicates a single circuit with fan cycling but no pump controls.
3. DNC model prefix indicates a single circuit with no fan or pump controls.
Source DPN000274, Rev. 2
103
Liebert® CRV™ System Design Manual
Heat Rejection—Liebert Drycoolers
Table 9-2
Drycooler Model
-112
-112
-174
-197
-197
-225
-310
-419
Drycooler piping, O.D., Cu
Number of Coil Circuits
8
16*, 26
8, 16*, 24
8
16*, 32
16, 26*
16, 32*
16, 32*
Inlet & Outlet Pipe Diameter (Inches)
1-3/8
2-1/8
2-1/8
1-3/8
2-1/8
2-1/8
2-1/8
2-1/8
* Standard Circuiting
- For model prefix designation, refer to Figure 9-2.
Source: DPN000275, Rev. 4
9.3 Drycooler General Data
Table 9-3
Drycooler electrical data
# of Fans
1
2
3
4
Model #
112
174, 197, 225
310
419
Pump Hp
ph
FLA
WSA
OPD
ph
FLA
0.75
1
12.4
14.3
20
—
—
0.75
3
7.0
7.9
15
3
10.5
1.5
3
10.1
11.8
15
3
13.6
2.0
3
11.0
12.9
20
3
3.0
3
14.1
16.8
25
5.0
3
20.2
24.4
40
7.5
3
27.7
33.8
0.75
3
3.3
1.5
3
2.0
3
3.0
3
5.0
3
9.3
11.2
15
7.5
3
12.7
15.5
25
WSA
OPD
ph
FLA
—
—
—
—
11.4
15
3
14.0
15.3
20
3
17.1
14.5
16.4
20
3
3
17.6
20.3
30
3
23.7
27.9
40
50
3
31.2
37.3
3.7
15
3
5.0
4.7
5.5
15
3
5.1
6.0
15
3
6.5
7.7
15
3
WSA
OPD
ph
FLA
WSA
OPD
—
—
—
—
—
—
14.9
15
3
17.5
18.4
20
18.8
25
3
20.6
22.3
25
18.0
19.9
25
3
21.5
23.4
30
3
21.1
23.8
30
3
24.6
27.3
35
3
27.2
31.4
45
3
30.7
34.9
50
60
3
34.7
40.8
60
3
38.2
44.3
60
5.4
15
3
6.7
7.1
15
3
8.4
8.8
15
6.4
7.2
15
3
8.1
8.9
15
3
9.8
10.6
15
6.8
7.7
15
3
8.5
9.4
15
3
10.2
11.1
15
8.2
9.4
15
3
9.9
11.1
15
3
11.6
12.8
15
3
11.0
12.9
20
3
12.7
14.6
20
3
14.4
16.3
20
3
14.4
17.2
25
3
16.1
18.9
25
3
17.8
20.6
30
208/230/60
460/3/60
Liebert® CRV™ System Design Manual
104
Heat Rejection—Liebert Drycoolers
Figure 9-3 Electrical field connections for fluid-temperature-control direct-drive drycoolers
Note:
Refer to specification sheet
for full load amp and wire
size amp ratings.
Electrical service connection terminals
when factory disconnect is not supplied.
Fuse block supplied on DNT drycoolers.
Factory wired to components
on electric panel
Factory wired to 24V
Class 2 control circuit
Electrical service connection terminals
when factory disconnect is supplied.
Factory installed
disconnect switch
(optional)
Unit Alarm Connection
Field supplied 24V
Class 2 wiring to
terminals 24 & 50 to
indicate "Standby
Glycol Pump On".
(Supplied with dual
pump controls only).
24
50
70
71
77
74
Control interlock. Field supplied
Class 2 wiring to interlock
drycooler 24V controls to Liebert
room unit. 7/8" (22mm) diameter
hole provided in bottom of
electric box.
Flow switch connection
(Dual pump controls only).
Field supplied 24V Class 2
wiring from terminals 74 & 77
to field mounted flow switch.
Electric service connection terminals for
power supply to pumps when pump controls
are factory supplied. Dual pump connection
shown. 7/8" (22mm) diameter knockouts
provided in bottom of electric box.
PUMP FUSES & OVERLOAD
HEATERS (SHIPPED WITH
STANDARD PUMP PACKAGES)
ARE TO BE FIELD INSTALLED
IN PUMP FUSE BLOCK(S) AND
STARTER(S).
Earth ground bar (50Hz).
Connection terminals with factory
ground from each high voltage
component for field supplied
earth ground wire.
105
Earth ground connection (60Hz).
Connection terminal for field
supplied earth ground wire.
Electric service entrance.
A 7/8" (22mm) diameter hole
in a 1-1/8" (29mm) knockout
provided in bottom of electric box.
Electric service not
provided by Liebert.
DPN000276
Rev. 2
Liebert® CRV™ System Design Manual
Heat Rejection—Liebert Drycoolers
9.4 Drycooler Pump Packages and Expansion Tank—Options
Figure 9-4 Drycooler pump package and pump mounting
17 1/4" "
2
1
SINGLE PACKAGE 0.75 - 7.5 HP
19"
483mm
3
2 7/8"
73mm
15 7/8"
403mm
1 3/4"
44mm
6 3/8"
162mm
8 3/4"
222mm
12 1/4"
311mm
30"
762mm
17"
432mm
PUMP PACKAGE MOUNTING ANGLES
1 3" (76.2mm) DIA. PUMP SUCTION CONNECTION K.O.'S
4
2 3" (76.2mm) DIA. PUMP DISCHARGE
CONNECTION K.O.'S
3 7/8" (22.2mm) DIA. ELECTRICAL K.O.'S
4
4 1/2" (12.7mm) DIA. HOLES FOR MOUNTING
3/4"
19mm
NOTE:
ANGLES LOCATED INSIDE, BOTTOM
OF PUMP PACKAGE. VIEW USED FOR
MOUNTING REFERENCE.
C
A
B
DPN000278
Pg. 1 Rev. 1
Mounting-hole Dimensional Data, in. (mm)
Pump package
A
B
C
Single (0.75 – 7.5 HP)
15-1/4 (387)
2-1/2 (64)
22-1/2 (572)
Liebert® CRV™ System Design Manual
106
Heat Rejection—Liebert Drycoolers
Table 9-4
Drycooler pump data
Connections
Electrical Data
HP
Pump Suct.
Conn.
Inches
Pump Disc.
Conn
Inches
FLA
Hz
3/4
1-1/4
3/4
3/4
1-1/4
3/4
PH
208
Volts
230
Volts
460
Volts
575
Volts
60
1
7.6
6.9
—
—
60
3
3.5
3.2
1.6
1.3
1-1/2
1-1/4
3/4
60
3
6.6
6.0
3.0
2.4
2
1-1/4
3/4
60
3
7.5
6.8
3.4
2.7
3
1-1/2
1
60
3
10.6
9.6
4.8
3.9
5
1-1/2
1-1/4
60
3
16.7
15.2
7.6
6.1
7-1/2
3
3
60
3
24.2
22.0
11.0
9.0
To calculate total pump and drycooler Full Load Amps (FLA):
Total FLA = Pump FLA + Drycooler FLA
To Calculate total pump and drycooler Wire Size Amps (WSA)
Total WSA = Largest Motor FLA x 1.25 + Sum of other Motor FLA values
To Calculate Total Pump and Drycooler Maximum Overcurrent Protective Device (OPD)
Total OPD = Largest Motor FLA x 4.0 + Sum of other Motor FLA values
Select standard fuse size (15A, 20A, 25A, 30A, etc.)
Source DPN000329, Rev. 1
Figure 9-5 Drycooler pump curve, 60 Hz
180
Curve
A
B
C
D
E
F
Total Head, Feet/Water
160
140
F
120
E
G
D
100
80
60
HP
3/4 (1-ph)
3/4 (3-ph)
1.5
2
3
5
7.5
G
C
B
A
40
20
0
10
20
30
40
50
60
70
80
120
160
200
250
300
400
Flow Rate, GPM
107
Liebert® CRV™ System Design Manual
Heat Rejection—Liebert Drycoolers
9.4.1
Drycooler Expansion Tank
This tank, included in a standard pump package, has an internal volume of 8.8 gal. (33 l) and a maximum
pressure of 100 psi (690 kPa).
This tank is sized for a typical “open” system with a fluid volume of less than 75 gal. (280l). When used in
a “closed” system, volumes of up to 140 gal. (910l) can be accommodated. The use of a safety relief valve,
field-supplied, is recommended for systems “closed” to atmospheric venting. Other piping accessories for
filling, venting or adjusting the fluid in the system, are recommended, but not included.
Figure 9-6 Drycooler Expansion tank
EXPANSION TANK
30 1/2"
775mm
9"
229mm
1/2" FPT
FITTING
7"
178mm
2 3/4"
70mm
4"
102mm
6 1/8"
156mm
1 1/2" TYP.
38mm
3"
76mm TYP.
6 13/16"
173mm
17 1/4"
438mm
1/2"
13mm
TYP. (8) PLACES
TYP.
1/2" FPT
FITTING
8.8 GALLON EXPANSION TANK
(33.3 Liter)
Liebert® CRV™ System Design Manual
DPN000329
Rev. 1
108
Heat Rejection—Liebert Drycoolers
9.5 Glycol-cooled Direct Drive Drycooler—Features
9.5.1
Drycooler Standard Features
Source: DPN000273, Revision 2
Coil—manufactured coil is constructed of copper tubes in a staggered tube pattern. Tubes are expanded
into continuous, rippled aluminum type fins. The fins have full depth fin collars completely covering the
copper tubes which are connected to heavy wall type L headers. Inlet coil connector tubes pass through
relieved holes in the tube sheet for maximum resistance to piping strain and vibration. Coils are factory
leak tested at a minimum of 300 PSIG, dehydrated, then filled and sealed with a nitrogen holding charge
for shipment.
Fans—Blades are constructed of zinc plated steel or aluminum with a maximum diameter of 30 inches and
secured to the fan shaft by a heavy duty hub with set screw. Fan guards are heavy gauge, close meshed,
steel wire with corrosion resistant finish.
Fans are factory balanced and tested before shipment.
Fan Motors—are provided with rain slingers, permanently lubricated bearings, and individual built-in
overload protection. Motors are rigidly mounted on die-formed galvanized steel supports.
Housing—The Drycooler housing is constructed of bright aluminum sheet and divided into individual fan
sections by full width baffles. Structural support members, including coil support frame, motor, and drive
support, are galvanized steel for strength and corrosion resistance. Aluminum legs are provided with
rigging holes for hoisting the unit into position.
Fluid Temperature Control System (Fan Cycling)—is complete with aquastats and electrical control
circuit factory wired in the integral control pattern. Aquastats cycle fans to maintain fluid temperature as
outdoor air temperature changes. Head pressure is controlled by the fluid regulating valve in the Liebert
indoor unit.
Fan Speed Control System—is complete with solid state fan speed control transducers operating
variable speed fans and is factory wired in the integral control panel. This is available on single fan
Drycoolers only.
9.5.2
Drycooler Optional Features
Source: DPN000273, Revision 2
Unit Disconnect Switch—A locking disconnect factory installed and wired in enclosed control section
(Standard with DSO, DDO, & DSF Drycoolers).
Pump Controls—Factory wired in the integral control panel. Single power feed to Drycooler supplies power
to both Drycooler and pumps (electric service connection). Single pump (DSO/DSF) and dual pump
(DDO/DDF) control options are available.
DDO/DDF Drycooler keeps one pump in active mode and the other in standby mode. Switchover between
pumps activated by factory-supplied pump selector switch or by contact closure on field-installed flow
switch.
109
Liebert® CRV™ System Design Manual
Heat Rejection—Liebert Drycoolers
Page intentionally left blank.
Liebert® CRV™ System Design Manual
110
CRV Seismic Application, 600 mm (24 in.) Models—Optional Unit Configuration Required
Appendix A: CRV Seismic Application,
600 mm (24 in.) Models—
Optional Unit Configuration Required
Source: DPN002765, pg. 1 – 2, Rev. 5
The International Code Council’s, International Building Code (IBC) is the primary code document for the
design and installation of building systems. Emerson Network Power has conducted analytical modeling
and dynamic shake-table testing of the Liebert CRV 600 mm (24 in.) product to provide an option for those
systems requiring seismic certification of compliance. This certification goes beyond the equipment’s
ability to withstand the seismic forces. The IBC system approach includes the equipment, equipment
anchorage, and the connections to the equipment (power, water supply and return, and ducting). In critical
applications, the equipment must be capable of performing its primary function after a seismic event within
the limit of certification.
A.1 Seismic Certification Criteria
The Liebert CRV 600 mm (24 in.) model has two levels of certification for units installed rigid-to-floor
without spring isolators. Both levels require a unit mounting bracket as shown in Detail A of Figures A-3
and A-5. The CRV600 is approved for seismic applications when properly-installed and used as intended
and located in United States where the “design 5 percent damped spectral response acceleration at short
periods adjusted for site class effects”, SDS is as shown in the Tables A-1 and A-2. Below-grade, at-grade
or above-grade installations are permitted and included in this approval. This certification is good
for an Ip of 1.0 or 1.5.
The first level is SDS=.8 which is the standard unit (Rigid-mount only - no Floor stand).
Table A-1
CRV 600 mm (24 in.) Shake-table test parameters, first level
Text Criteria
ICC-ES AC 156
SDS (g)
z/h
AFLX
ARIG
AFLX_VERT
ARIG_VERT
Rigid Mount
0.8
1.0
1.28
0.96
0.54
0.22
Equipment is qualified for SDS and z/h values shown. Qualification may be valid for higher SDS where z/h <1.0.
The second level for SDS=2.00/2.50 requires factory-installed bracing (rigid or floor-stand mount).
Table A-2
Text Criteria
ICC-ES AC 156
Rigid Base Mount
or Floor Stand
CRV 600 mm (24 in.) Shake-table test parameters, second level
SDS (g)
z/h
AFLX
ARIG
AFLX_VERT
ARIG_VERT
2.00
2.50
1.0
0
3.20
—
2.40
—
—
1.68
—
0.68
Equipment is qualified for SDS and z/h values shown. Qualification may be valid for varying SDS where z/h <1.0.
A.2 Requirements for Anchorage
Anchors—Mounting requirement details such as brand, type, embedment depth, edge spacing, anchor
spacing, concrete strength, wall bracing, and special inspection must be outlined and approved by the
project Structural Engineer of Record.
Anchorage Surface—Structural floors, and housekeeping pads must also be seismically designed and
approved by the project Structural Engineer of Record to withstand the seismic anchor loads as defined on
the installation drawings. The installing contractor is responsible for the proper installation of all anchors
and mounting hardware, observing the mounting requirement details outlined by the Engineer of Record.
Contact the Manufacturer’s Representative if a detailed Seismic Installation Calculation Package is
required.
Connections to Unit—Electrical wiring, conduit, and/or other connections to the equipment is the
responsibility of others. Data and recommendations are supplied here and in the unit installation
supplement for seismic installation
111
Liebert® CRV™ System Design Manual
CRV Seismic Application, 600 mm (24 in.) Models—Optional Unit Configuration Required
Figure A-1 CRV 600 mm (24 in.)—Seismic rigid floor stand anchoring dimensions
ANSI B18.22.1 Type A,
Series W Plain Washer
required at each
anchor location
2 1/2"
64mm
Min. Edge
Distance
* Min. Hole
Depth
* Min. Pad
Depth
* Min.
Embedment
6 1/2"
165mm
* Specified by Engineer of Record.
ANCHOR DETAIL
Anchor bolt sized per HILTI KWIK BOLT TZ carbon and stainless
In concrete ICC ESR-1917. Alternates are subject to review by
Emerson or Engineer of Record.
6 1/2"
165mm
2 1/2"
64mm
1 1/2"
38mm
ISO VIEW WITH FLOORSTAND
46 3/8"
1179mm
Hole to hole
.563
14.29 TYP.
(8 places)
3/4"
19mm
3/4"
19mm
REAR
OF
UNIT
FRONT
OF
UNIT
21 3/4"
551mm
DPN002765
Pg. 3 Rev. 5
FLOORSTAND ANCHORING DIMENSIONS TOP VIEW OF CRV
Anchor
Size
Model #
CR020 & CR035 (Air & Water)
and CR040 (Chilled Water)
SDS
2.5
in.
(mm)
1/2
(12.7)
Operating
Mass*
Maximum Load per Anchor
Tension
Shear
lbs
kg
lbs
kg
lbs
kg
lbs
kg
1052
478
1256
570
1032
468
187
85
All loads are calculated per ASCE 7-05, Chapter 13.6 Rp = 6.1, a = 2.5, lp = 1.5.
* Operating mass includes the operating refrigerant and water volume.
Source: DPN002765, Pg. 3, Rev. 5
Liebert® CRV™ System Design Manual
Macimum
Compressive
112
CRV Seismic Application, 600 mm (24 in.) Models—Optional Unit Configuration Required
Figure A-2 CRV 600 mm (24 in.)—Seismic rigid floor stand—overall dimensions
Factory supplied plugs
can be removed after
CRV unit is installed
"A"
"H*"
38 3/8"
976mm
20 1/4"
513mm
1 1/2"
38.1mm
2 1/2"
64mm
9 1/2"
241mm
* 4.6in
117mm
FOOT (4 PLACES)
THREADED ROD 7/8" GRADE 7
& NEOPRENE PAD 1/8" THICK.
SEE PART 307058P1 FOR DETAILS
Foot Detail
* Nominal
*H
in (mm)
A
in (mm)
12
12 (305)
8-3/4 (222)
18
18 (457)
14-3/4 (375)
24
24 (610)
20-3/4 (527)
113
DPN002765
Pg. 5 Rev. 5
Liebert® CRV™ System Design Manual
CRV Seismic Application, 600 mm (24 in.) Models—Optional Unit Configuration Required
Figure A-3 CRV 600 mm (24 in.)—Seismic rigid floor stand connection details
A
Rear of CRV unit
with door open
Front of CRV unit
with baffle panel
removed
Floorstand anchoring
Top of leveling foot
Notes:
Base of unit
1/4-14 self drill screws
supplied
10 PLACES
1.) To level the unit lower the four stabilizing feet until they make
contact with the floorstand. (SEE DETAIL "A")
2.) Anchor the bracket to the unit and the floorstand using the
screws that are provided, all factory supplied screws must be
used to maintain seismic certification (SEE DETAIL "A').
3.) The same mounting bracket is used in the front and rear of the
unit.
4.) This document is not to be used for field installation, see CRV
manual.
1/2-13 bolts,
nuts & washers supplied
Drilling hole in floorstand
not required
3 PLACES
Bracket supplied
front & rear
DPN002765
Pg. 8 Rev. 5
DETAIL A
Liebert® CRV™ System Design Manual
114
CRV Seismic Application, 600 mm (24 in.) Models—Optional Unit Configuration Required
Figure A-4 CRV 600 mm (24 in.)—Seismic rigid floor-mount bracket anchoring dimensions
2 1/2"
64mm
Min. Edge
Distance
ANSI B18.22.1 Type A,
Series W Plain Washer
required at each
anchor location
* Min. Hole
Depth
* Min.
Embedment
* Min. Pad
Thickness
ANCHOR DETAIL
* Specified by Engineer of Record.
Anchor bolt sized per HILTI KWIK BOLT TZ carbon and stainless
In concrete ICC ESR-1917. Alternates are subject to review by
Emerson or Engineer of Record.
ISO VIEW ON FLOOR
44 1/2"
1131mm
1 1/4"
31mm
1 1/4"
33mm
11 3/4"
300mm
REAR OF UNIT
23 5/8"
600mm
FRONT OF UNIT
22 3/8"
570mm
.563
14.29 TYP.
(6 places)
FLOOR ANCHORING DIMENSIONS
View from top of the CRV unit.
Front and rear doors removed for clarity.
Model #
CR020 & CR035 (Air & Water)
and CR040 (Chilled Water)
SDS
0.8
2.5
Anchor
Size
in. (mm)
1-2 (12.7)
1/2 (12.7)
Operating
Mass*
lbs
kg
938
426
952
432
Macimum
Compressive
lbs
kg
505
229
1249
567
DPN002765
Pg. 4 Rev. 5
Maximum Load per Anchor
Tension
Shear
lbs
kg
lbs
kg
249
113
70
32
981
446
221
100
All loads are calculated per ASCE 7-05, Chapter 13.6 Rp = 6.1, a = 2.5, lp = 1.5.
* Operating mass includes the operating refrigerant and water volume.
Source: DPN002765, Pg. 4, Rev. 5
115
Liebert® CRV™ System Design Manual
CRV Seismic Application, 600 mm (24 in.) Models—Optional Unit Configuration Required
Figure A-5 CRV 600 mm (24 in.)—Seismic rigid floor-mount bracket connection details
Baffle panel removed
for clarity
REAR OF UNIT
A
Top of leveling foot
Anchoring to floor,
see note 3.
.563 TYP.
14.3
(3 places)
Notes:
1) Prior to mounting bracket, lower the four leveling feet (see detail "B")
until they make contact with the floor. Ensure that unit is level to avoid
corrosion or health hazards caused by condensate accumulation.
2) Bracket to be centered on base of CRV unit (shown in detail "A").
3) Anchor bracket to floor. Refer to anchoring detail on page 4.
4) Self drill screws (see detail "A") to secure bracket to CRV unit.
5) The bracket is also used in the rear of the CRV unit.
6) This document is not to be used for field installation.
1/4-14 self-drill
screw supplied
8 PLACES
Bracket supplied for
front and rear of unit
DETAIL A
DPN002765
Pg. 9 Rev. 5
FRONT OF UNIT
Liebert® CRV™ System Design Manual
116
CRV Seismic Application, 600 mm (24 in.) Models—Optional Unit Configuration Required
Figure A-6 CRV 600 mm (24 in.) seismic electrical wiring
High and low voltage
connections field
supplied and wired
OR
OR
Seismic compensation
Electric power
through the top
of unit only
Field supplied disconnect switch
within sight of Liebert CRV unit.
Wire per local codes.
Seismic
compensation
High and low voltage
connections field
supplied and wired
Electrical power
through the bottom
of unit only
Note!
Flexible conduit and strain relief must be provided by the field
to allow for movement of the unit during a seismic event.
The flexible conduit shall have at least one bend between the
rigid conduit connection at the unit cabinet and the connection
to the rigid conduit or foundation.
117
DPN002765
Pg. 6 Rev. 5
Liebert® CRV™ System Design Manual
CRV Seismic Application, 600 mm (24 in.) Models—Optional Unit Configuration Required
Figure A-7 CRV 600 mm (24 in.) seismic piping
Anchor piping to CRV unit.
Field supplied and piped prefabricated
seismic compensation piping
Anchor piping to building foundation
CRV Unit with piping through the top, all models.
When unit is on a floorstand the leveler feet must
be down firmly against the top plate of the
floorstand. When unit is not on a floorstand the
leveler feet must be down firmly against the floor.
Field supplied and piped prefabricated
seismic compensation piping
Anchor piping to building foundation
When unit is on a floorstand,
anchor to the floorstand.
When unit piping is out the top,
anchor to the CRV unit.
CRV Unit with piping through the bottom.
Anchor to building
foundation.
When unit is on a floorstand,
anchor piping to the floorstand.
Seismic compensation device
FLEXIBLE LOOP EXAMPLE
Liebert® CRV™ System Design Manual
Flexible Loops:
All units shall be attached to the piping system using flexible loops designed for
seismic movement. Flexible loops shall be capable of movement in the ±X, ±Y
and ±Z planes and must completely isolate the equipment from the piping. The
loops shall be suitable for an operating pressure and temperature of the system,
refer to Liebert installation instructions. This includes condensate drainage,
refrigerant lines, and chilled water supply and return lines. Follow manufacturer’s
installation instructions for proper seismic application of flexible loops.
118
DPN002765
Pg. 7 Rev. 5
CRV Non-seismic Application, 600 mm (24 in.) Models—Optional Unit Configuration Required
Appendix B: CRV Non-seismic Application,
600 mm (24 in.) Models—
Optional Unit Configuration Required
Figure B-1 CRV 600 mm (24 in.)—rigid floor-mount bracket anchoring dimensions
ISO VIEW ON FLOOR
44 1/2"
1131mm
1 1/4"
33mm
1 1/4"
31mm
11 3/4"
300mm
23 5/8"
600mm
REAR OF UNIT
FRONT OF UNIT
22 3/8"
570mm
FLOOR ANCHORING DIMENSIONS
View from top of the CRV unit.
Front and rear doors removed for clarity.
119
9/16"
14mm
(6 places)
TYP.
DPN003272
Pg. 1 Rev.1
Liebert® CRV™ System Design Manual
CRV Non-seismic Application, 600 mm (24 in.) Models—Optional Unit Configuration Required
Figure B-2 CRV 600 mm (24 in.)—rigid floor-mount bracket connection details
REAR OF UNIT
A
Top of leveling foot
Anchor to floor,
see note 3.
9/16"
14mm
(3 places)
Notes:
1) Prior to mounting bracket, lower the four leveling feet (see detail "A")
until they make contact with the floor. Ensure that unit is level to avoid
corrosion or health hazards caused by condensate accumulation.
2) Bracket to be centered on base of CRV unit (shown in detail "A").
3) Anchor bracket to floor. Refer to anchoring detail, page 1.
4) Use self drilling screws to secure bracket to CRV unit (see detail A).
5) The same bracket is used in the front and rear of the CRV unit.
6) This document is not to be used for field installation.
1/4-14 self-drill
screw supplied
8 PLACES
Bracket supplied for
front and rear of unit
DETAIL A
DPN003272
Pg. 2 Rev.1
FRONT OF UNIT
Liebert® CRV™ System Design Manual
TYP.
120
CRV Non-seismic Application, 600 mm (24 in.) Models—Optional Unit Configuration Required
Figure B-3 CRV 600 mm (24 in.)—rigid floor stand anchoring dimensions
ISO VIEW WITH FLOORSTAND
46 3/8"
1179mm
2 1/2"
64mm
6 1/2"
165mm
Hole to hole
9/16"
14.29mm
(8 places)
1 1/2"
38mm
TYP.
3/4"
19mm
3/4"
19mm
REAR
OF
UNIT
FRONT
OF
UNIT
FLOORSTAND ANCHORING DIMENSIONS TOP VIEW OF CRV
121
21 3/4"
551mm
DPN003273
Pg. 1 Rev. 2
Liebert® CRV™ System Design Manual
CRV Non-seismic Application, 600 mm (24 in.) Models—Optional Unit Configuration Required
Figure B-4 CRV 600 mm (24 in.)—rigid floor stand—overall dimensions
Factory supplied plugs
can be removed after
CRV unit is installed
"A"
"H*"
38 3/8"
976mm
20 1/4"
513mm
1 1/2"
(38.1mm)
* 4.6in
117mm
2 1/2"
64mm
9 1/2"
241mm
FOOT (4 PLACES)
THREADED ROD 7/8"
& NEOPRENE PAD 1/8" THICK.
Foot Detail
* Foot provides 0.25in (6.4mm)
of adjustment from nominal height H
DPN003273
Pg. 2 Rev. 2
* Nominal
*H
in (mm)
A
in (mm)
12
12 (305)
8-3/4 (222)
18
18 (457)
14-3/4 (375)
24
24 (610)
20-3/4 (527)
* Foot provides ±0.25 in. (6.4 mm)
adjustment from nominal height.
Liebert® CRV™ System Design Manual
122
CRV Non-seismic Application, 600 mm (24 in.) Models—Optional Unit Configuration Required
Figure B-5 CRV 600 mm (24 in.)—rigid floor stand connection details
Rear of CRV unit
with door open
A
Floorstand anchoring
Notes:
Front of CRV unit
with baffle panel
removed
Top of leveling foot
1.) To level the unit lower the four stabilizing feet until they make
contact with the floorstand. (SEE DETAIL "A")
2.) Anchor the bracket to the unit and the floorstand using the
screws that are provided (SEE DETAIL "A').
3.) The same mounting bracket is used in the front and
rear of the unit.
4.) This document is not to be used for field installation, see
CRV manual.
Base of unit
1/4-14 self drill screws
supplied, 10 PLACES.
1/2-13 bolts,
nuts & washers supplied.
Align holes in bracket
with holes in floorstand,
3 PLACES.
Bracket supplied
front & rear
DPN003273
Pg. 3 Rev. 2
DETAIL A
123
Liebert® CRV™ System Design Manual
CRV Non-seismic Application, 600 mm (24 in.) Models—Optional Unit Configuration Required
Page intentionally left blank.
Liebert® CRV™ System Design Manual
124
CRV Seismic Application, 300 mm (12 in.) Models—Optional Unit Configuration Required
Appendix C: CRV Seismic Application,
300 mm (12 in.) Models—
Optional Unit Configuration Required
Source: DPN003027, pg. 1 – 2, Rev. 0
The International Code Council’s, International Building Code (IBC) is the primary code document for the
design and installation of building systems. Emerson Network Power has conducted analytical modeling
and dynamic shake-table testing of the Liebert CRV 300 mm (12 in.) product to provide an option for those
systems requiring seismic certification of compliance. This certification goes beyond the equipment’s
ability to withstand the seismic forces. The IBC system approach includes the equipment, equipment
anchorage, and the connections to the equipment (power, water supply and return, and ducting). In critical
applications, the equipment must be capable of performing its primary function after a seismic event within
the limit of certification.
C.1 Seismic Certification Criteria
The Liebert CRV 300 mm (12 in.) model has two levels of certification for units installed rigid-to-floor
without spring isolators. Both levels require a unit mounting bracket as shown in Detail A of Figures C-3
and C-5. The CRV300 is approved for seismic applications when properly-installed and used as intended
and located in United States where the “design 5 percent damped spectral response acceleration at short
periods adjusted for site class effects”, SDS is as shown in the Tables C-1 and C-2. Below-grade, at-grade
or above-grade installations are permitted and included in this approval. This certification is good
for an Ip of 1.0 or 1.5.
The first level is SDS=.8 which is the standard unit (Rigid-mount only - no Floor stand).
Table C-1 CRV 300 mm (12 in.) Shake-table test parameters, first level
Text Criteria
ICC-ES AC 156
SDS (g)
z/h
AFLX
ARIG
AFLX_VERT
ARIG_VERT
Rigid Mount
0.8
1.0
1.28
0.96
0.54
0.22
Equipment is qualified for SDS and z/h values shown. Qualification may be valid for higher SDS where z/h <1.0.
The second level for SDS=2.00/2.50 requires factory-installed bracing (rigid or floor-stand mount).
Table C-2 CRV 300 mm (12 in.) Shake-table test parameters, second level
Text Criteria
ICC-ES AC 156
Rigid Base Mount
or Floor Stand
SDS (g)
z/h
AFLX
ARIG
AFLX_VERT
ARIG_VERT
2.00
2.50
1.0
0
3.20
—
2.40
—
—
1.68
—
0.68
Equipment is qualified for SDS and z/h values shown. Qualification may be valid for varying SDS where z/h <1.0.
C.2 Requirements for Anchorage
Anchors—Mounting requirement details such as brand, type, embedment depth, edge spacing, anchor
spacing, concrete strength, wall bracing, and special inspection must be outlined and approved by the
project Structural Engineer of Record.
Anchorage Surface—Structural floors, and housekeeping pads must also be seismically designed and
approved by the project Structural Engineer of Record to withstand the seismic anchor loads as defined on
the installation drawings. The installing contractor is responsible for the proper installation of all anchors
and mounting hardware, observing the mounting requirement details outlined by the Engineer of Record.
Contact the Manufacturer’s Representative if a detailed Seismic Installation Calculation Package is
required.
Connections to Unit—Electrical wiring, conduit, and/or other connections to the equipment is the
responsibility of others. Data and recommendations are supplied here and in the unit installation
supplement for seismic installation
125
Liebert® CRV™ System Design Manual
CRV Seismic Application, 300 mm (12 in.) Models—Optional Unit Configuration Required
Figure C-1 CRV 300 mm (12 in.)—Seismic rigid floor stand anchoring dimensions
2 1/2"
64mm
MIN. EDGE
DISTANCE
ANSI B18.22.1
TYPE A, SERIES W PLAIN
WASHER REQUIRED AT
EACH ANCHOR LOCATION
MIN.
* MIN. HOLE EMBEDMENT
DEPTH
MIN. PAD
THICKNESS
6 1/2"
165mm
* Specified by Engineer of record.
ISO VIEW WITH FLOORSTAND
ANCHOR BOLT SIZED PER HILTI KWIK BOLT TZ CARBON AND STAINLESS
IN CONCRETE, ICC ESR-1917. ALTERNATES ARE SUBJECT TO REVIEW BY
EMERSON OR ENGINEER OF RECORD.
45"
1143mm
6 1/2"
165mm
Electrical and Piping access
for Air, Water/Glycol Models
1 7/8"
48mm
1 1/2"
38mm
Electrical and Piping access
for Chilled Water Models
9/16" TYP.
14mm
(8 PLACES)
1 1/2"
38mm
11 13/16"
300mm
FRONT
OF
UNIT
11 5/16"
287mm
REAR
OF
UNIT
8 13/16"
224mm
41 1/4"
1048mm
48"
1219mm
DPN003027
Pg. 3 Rev. 2
FLOORSTAND AND ANCHORING DIMENSIONS TOP VIEW OF CRV
Anchor
Size
Model #
CR019 (Air & Water)
and CR032 (Chilled Water)
SDS
2.5
in.
(mm)
1/2
(12.7)
Operating
Mass*
Macimum
Compressive
Tension
Shear
lbs
kg
lbs
kg
lbs
kg
lbs
kg
636
289
1493
678
1359
617
113
51
All loads are calculated per ASCE 7-05, Chapter 13.6 Rp = 6.1, a = 2.5, lp = 1.5.
* Operating mass includes the operating refrigerant and water volume.
Source: DPN003027, Pg. 3, Rev. 2
Liebert® CRV™ System Design Manual
Maximum Load per Anchor
126
CRV Seismic Application, 300 mm (12 in.) Models—Optional Unit Configuration Required
Figure C-2 CRV 300 mm (12 in.)—Seismic rigid floor stand—overall dimensions
REAR OF UNIT
FIELD INSTALLED PANELS. CAN BE
REMOVED AFTER CRV UNIT IS INSTALLED.
11 13/16 in
(300 mm)
41 1/4in
(1048 mm)
A
H
NOMINAL
1 1/2"
38.1mm
9 1/2"
241mm
FRONT OF UNIT
2 1/2"
64mm
*
4.6
117
FOOT DETAIL
* Nominal
*H
in (mm)
A
in (mm)
12
12 (305)
8-3/4 (222)
18
18 (457)
14-3/4 (375)
24
24 (610)
20-3/4 (527)
DPN003027
Pg. 5 Rev. 2
* Foot provides ±0.25 in. (6.4 mm)
adjustment from nominal height.
127
Liebert® CRV™ System Design Manual
CRV Seismic Application, 300 mm (12 in.) Models—Optional Unit Configuration Required
Figure C-3 CRV 300 mm (12 in.)—Seismic rigid floor stand connection details
DETAIL B
7/8" Grade 7 threaded rod with
1/8" thick neoprene pad
(typical 4 places)
LEVELER FOOT ADJUSTMENT
Install both inner and outer seismically
rated hold down brackets with the factory
provided self drilling screws. All screws
must be used to retain seismic rating.
Jam nut
50 ft. lbs. (68 Nm)
Hold down bracket
(outer)
Unit base
channel
B
A
Leveler foot adjusted firmly
against floorstand top.
Hold down bracket
(inner)
accumulation.
LEVELER FOOT
ADJUSTMENT
Factory supplied 1/4" - 14
self drilling screws
(typical 17 places)
Factory supplied seismic
hold down bracket
(Front and Rear)
DETAIL A
Liebert® CRV™ System Design Manual
LEVELER FOOT
128
DPN003027
Pg. 8 Rev. 2
CRV Seismic Application, 300 mm (12 in.) Models—Optional Unit Configuration Required
Figure C-4 CRV 300 mm (12 in.)—Seismic rigid floor-mount bracket anchoring dimensions
2 1/2"
64mm
MIN. EDGE
DISTANCE
ANSI B18.22.1
TYPE A, SERIES W PLAIN
WASHER REQUIRED AT
EACH ANCHOR LOCATION
* MIN.
* MIN. HOLE EMBEDMENT
DEPTH
* MIN.
PAD THICKNESS
* Specified by Engineer of record.
ANCHORAGE DETAIL
ISO VIEW ON FLOOR
ANCHOR BOLT SIZED PER HILTI KWIK BOLT TZ CARBON AND STAINLESS
IN CONCRETE, ICC ESR-1917. ALTERNATES ARE SUBJECT TO REVIEW BY
EMERSON OR ENGINEER OF RECORD.
1 1/16"
27mm
43 1/2"
1105mm
2"
50mm
t 11 13/16"
299mm
Rear
of
Unit
5 3/4"
146mm
2"
50mm
1 1/16"
27mm
TYPICAL
9/16"
14mm
(8 PLACES)
VIEW FROM TOP OF CRV UNIT.
FRONT & REAR DOOR/PANEL REMOVED FOR CLARITY
Anchor
Size
Model #
CR019 (Air & Water)
and CR032 (Chilled Water)
1 1/16"
27mm
FLOOR ANCHORING DIMENSIONS
SDS
in.
(mm)
Operating
Mass*
DPN003027
Pg. 4 Rev. 2
Macimum
Compressive
Maximum Load per Anchor
Tension
Shear
lbs
kg
lbs
kg
lbs
kg
lbs
kg
0.8
1/2
(12.7)
545
247
453
206
345
157
29
13
2.5
1/2
(12.7)
548
249
1281
582
1173
533
92
42
All loads are calculated per ASCE 7-05, Chapter 13.6 Rp = 6.1, a = 2.5, lp = 1.5.
* Operating mass includes the operating refrigerant and water volume.
Source: DPN003027, Pg. 4, Rev. 2
129
Liebert® CRV™ System Design Manual
CRV Seismic Application, 300 mm (12 in.) Models—Optional Unit Configuration Required
Figure C-5 CRV 300 mm (12 in.)—Seismic rigid floor-mount bracket connection details
Leveler Foot Adjustment
Install both inner and outer seismic rated
hold down brackets with the factory provided
self drilling screws. All screws must be used
to retain seismic rating.
Hold down bracket
(outer)
Jam nut
50 ft. lbs. (68 Nm)
Unit base
channel
Leveler foot adjusted firmly
against floor.
A
Hold down bracket
(inner)
Front of CRV
with door open
LEVELER FOOT ADJUSTMENT
Factory supplied
1/4" - 14 self drilling
screws (typical 10 places)
Factory supplied inner and
outer seismic hold down
brackets (Front and Rear)
.563 (14.3)
typical 4 places
ANCHORING TO FLOOR,
SEE PAGE 4
LEVELER FOOT
DETAIL A
Liebert® CRV™ System Design Manual
130
DPN003027
Pg. 9 Rev. 2
CRV Seismic Application, 300 mm (12 in.) Models—Optional Unit Configuration Required
Figure C-6 CRV 300 mm (12 in.) seismic electrical wiring
HIGH AND LOW VOLTAGE
CONNECTIONS FIELD
SUPPLIED AND WIRED.
SEISMIC
COMPENSATION
ELECTRICAL POWER THROUGH
THE TOP OF THE UNIT ONLY
FIELD SUPPLIED DISCONNECT
SWITCH WITHIN SIGHT OF
HE LIEBERT CRV300 UNIT.
WIRE PER LOCAL CODES.
SEISMIC
COMPENSATION
CW ELECTRICAL
FIELD CONNECTIONS
HIGH AND LOW VOLTAGE.
SEISMIC
COMPENSATION
DX ELECTRICAL
FIELD CONNECTIONS
HIGH AND LOW VOLTAGE.
ELECTRICAL POWER THROUGH THE BOTTOM
OF THE UNIT UNDER FLOOR ONLY
NOTE!
FLEXIBLE CONDUIT AND STRAIN RELIEF MUST BE PROVIDED BY THE FIELD
TO ALLOW FOR MOVEMENT OF THE UNIT DURING A SEISMIC EVENT.
THE FLEXIBLE CONDUIT SHALL HAVE AT LEAST ONE BEND BETWEEN THE
RIGID CONDUIT CONNECTION AT THE UNIT CABINET AND THE CONNECTION
TO THE RIGID CONDUIT OR FOUNDATION.
131
DPN003027
Pg. 6 Rev. 2
Liebert® CRV™ System Design Manual
CRV Seismic Application, 300 mm (12 in.) Models—Optional Unit Configuration Required
Figure C-7 CRV 300 mm (12 in.) seismic piping
Anchor piping to CRV300 unit.
Field supplied and piped prefabricated
seismic compensation piping
Anchor piping to building foundation
CRV300 Unit with piping through the top, all models.
When unit is on a floorstand the leveler feet must
be down firmly against the top plate of the
floorstand. When unit is not on a floorstand the
leveler feet must be down firmly against the floor.
CRV Unit with piping through the bottom.
When unit is on a floorstand,
anchor piping to the floorstand.
Field supplied and piped prefabricated
seismic compensation piping
Anchor piping to building foundation
When unit is on a floorstand,
anchor piping to the floorstand.
When unit is on a floorstand,
anchor to the floorstand.
When unit piping is out the top,
anchor to the CRV300 unit.
Chilled Water
models
Anchor to building
foundation.
Anchor piping to building foundation
Field supplied and piped prefabricated
seismic compensation piping
Air, Water/Glycol models.
Flexible Loops:
All units shall be attached to the piping system using flexible loops designed for
seismic movement. Flexible loops shall be capable of movement in the ±X, ±Y
and ±Z planes and must completely isolate the equipment from the piping. The
loops shall be suitable for an operating pressure and temperature of the system,
refer to Liebert installation instructions. This includes condensate drainage,
refrigerant lines, and chilled water supply and return lines. Follow manufacturer’s
installation instructions for proper seismic application of flexible loops.
Seismic compensation device
DPN003027
Pg. 7 Rev. 2
FLEXIBLE LOOP EXAMPLE
Liebert® CRV™ System Design Manual
132
CRV Non-seismic Application, 300 mm (12 in.) Models—Optional Unit Configuration Required
Appendix D: CRV Non-seismic Application,
300 mm (12 in.) Models—
Optional Unit Configuration Required
Figure D-1 CRV 300 mm (12 in.)—rigid floor-mount bracket anchoring dimensions
ISO VIEW ON FLOOR
1 1/16"
27mm
43 1/2"
1105mm
2"
50mm
Front
of
11 13/16"
Unit 299mm
Rear
of
Unit
5 3/4"
146mm
2"
50mm
1 1/16"
27mm
TYPICAL
9/16"
14mm
(8 PLACES)
FLOOR ANCHORING DIMENSIONS
VIEW FROM TOP OF CRV UNIT.
FRONT & REAR DOOR/PANEL REMOVED FOR CLARITY
133
1 1/16"
27mm
DPN003694
Pg. 1 Rev. 0
Liebert® CRV™ System Design Manual
CRV Non-seismic Application, 300 mm (12 in.) Models—Optional Unit Configuration Required
Figure D-2 CRV 300 mm (12 in.)—rigid floor-mount bracket connection details
Notes:
1. Prior to mounting brackets, lower the four leveling feet (See Detail "A")
until they make contact with the floor. Ensure that the unit is level to
avoid corrosion or health hazards caused by condensate accumulation.
2. Anchor the brackets to the unit using the screws that are
provided.
3. The brackets are to be secured to the floor using field supplied anchors.
4. The same mounting brackets are used in the front and rear of the unit.
5. This document is not to be used for field installation. See CRV User Manual.
A
Front of CRV
with door open
LEVELER FOOT ADJUSTMENT
Factory supplied
1/4" - 14 self drilling
screws (typical 6 places)
Factory supplied brackets
(Front and Rear)
.563 (14.3)
typical 4 places
Liebert® CRV™ System Design Manual
LEVELER FOOT
DPN003694
Pg. 2 Rev. 0
DETAIL A
134
CRV Non-seismic Application, 300 mm (12 in.) Models—Optional Unit Configuration Required
Figure D-3 CRV 300 mm (12 in.)—rigid floor stand anchoring dimensions
ISO VIEW WITH FLOORSTAND
45"
1143mm
6 1/2"
165mm
1 7/8"
48mm
1 1/2"
38mm
Electrical and Piping access
for Air, Water/Glycol Models
Electrical and Piping access
for Chilled Water Models
9/16" TYP.
14mm
(8 PLACES)
1 1/2"
38mm
11 13/16"
300mm
FRONT
OF
UNIT
11 5/16"
287mm
8 13/16"
224mm
REAR
OF
UNIT
41 1/4"
1048mm
48"
1219mm
FLOORSTAND AND ANCHORING DIMENSIONS TOP VIEW OF CRV
135
DPN003696
Pg. 1 Rev. 0
Liebert® CRV™ System Design Manual
CRV Non-seismic Application, 300 mm (12 in.) Models—Optional Unit Configuration Required
Figure D-4 CRV 300 mm (12 in.)—rigid floor stand—overall dimensions
REAR OF UNIT
FIELD INSTALLED PANELS. CAN BE
REMOVED AFTER CRV UNIT IS INSTALLED.
11 13/16 in
(300 mm)
41 1/4in
(1048 mm)
A
H
NOMINAL
1 1/2"
38.1mm
9 1/2"
241mm
FRONT OF UNIT
2 1/2"
64mm
*
4.6
117
FOOT DETAIL
* Foot provides 0.25 in (6.4mm) adjustment
from nominal height H.
* Nominal
*H
in (mm)
A
in (mm)
12
12 (305)
8-3/4 (222)
18
18 (457)
14-3/4 (375)
24
24 (610)
20-3/4 (527)
* Foot provides ±0.25 in. (6.4 mm)
adjustment from nominal height.
Liebert® CRV™ System Design Manual
136
DPN003696
Pg. 2 Rev. 0
CRV Non-seismic Application, 300 mm (12 in.) Models—Optional Unit Configuration Required
Figure D-5 CRV 300 mm (12 in.)—rigid floor stand connection details
Notes:
1. Prior to mounting brackets, lower the four leveling feet (See Detail "A")
until they make contact with the floor. Ensure that the unit is level to
avoid corrosion or health hazards caused by condensate accumulation.
2. Anchor the brackets to the unit using the screws that are provided.
3. The brackets are to be secured to the floorstand using factory supplied screws.
4. The same mounting brackets are used in the front and rear of the unit.
5. This document is not to be used for field installation. See CRV User Manual.
A
2
LEVELER FOOT
ADJUSTMENT
Front View of CRV300
with front door open
Factory supplied 1/4" - 14
self drilling screws
(typical 13 places)
Factory supplied
hold down bracket
(Front and Rear)
DETAIL A
LEVELER FOOT
DPN003696
Pg. 3 Rev. 0
137
Liebert® CRV™ System Design Manual
CRV Non-seismic Application, 300 mm (12 in.) Models—Optional Unit Configuration Required
Page intentionally left blank.
Liebert® CRV™ System Design Manual
138
Liebert CRV Intended Application
Appendix E: Liebert CRV Intended Application
The Liebert CRV can be applied in virtually any application. Since the unit provides complete temperature
and humidity control along with filtration, it can be deployed as the only cooling unit in smaller data centers
and network closets. Larger data centers are able to benefit from its standard rack-sized footprint,
deploying it as a supplemental spot cooler to address both hot spots and high-density racks. The small
footprint and variable cooling and airflow allow the unit to be initially oversized in anticipation of future IT
expansion with minimal footprint or energy consumption penalties. The unit can be applied on both raised
and non-raised floors, allowing it work with existing under floor and overhead cooling systems. The unit is
compatible with all forms of aisle containment, but the control algorithms have been optimized for cold aisle
containment with SmartAisle™ from Emerson Network Power®.
Figure E-1 Example of high-density installation with alternating cold and hot aisles
Liebert
CRV
Liebert
CRV
Re
ar
Liebert
CRV
Fro
nt
Liebert
CRV
Fr
on
to
fR
of
ac
ks
Ra
of
R
ack
s
Liebert
CRV
Liebert
CRV
cks
Liebert CRV
Cold Aisle
Liebert CRV
Hot Aisle
Cold Aisle
E.1 Unit-to-Unit (U2U)—Coordinated Cooling Operation
The Liebert iCOM controls permit networking the Liebert CRV’s and coordinating the units’ operation to
improve cooling and efficiency. In U2U mode, the networked Liebert CRV’s share data from the standard
temperature sensors to increase or reduce cooling. For further information, see:
• 2.1 - Air-Cooled, 600 mm (24 in.) —Standard Features
• 2.6 - Water/Glycol, 600 mm (24 in.)—Optional Features
• 2.9 - Chilled-water, 600 mm (24 in.)—Standard Features
• 2.11 - Chilled-water, 300 mm (12 in.)—Standard Features
139
Liebert® CRV™ System Design Manual
Liebert CRV Intended Application
E.2 SmartAisle™ Configuration
The SmartAisle from Emerson Network Power® is an intelligent row-based system that integrates data
center racks, power, row cooling, aisle containment, monitoring and control technologies into a complete
data center layout.
E.2.1 Typical SmartAisle Components
Each SmartAisle from Emerson is custom-designed, offering the most favorable layout for the installation.
The design takes into account the equipment required, equipment sizes (with the heat load or power
consumption), cooling equipment type (chilled water or water/glycol based) and whether cooling or power
redundancy is desired.
Some typical components are:
Liebert APM™
DCF™ or DCM™ Cabinets
Liebert Battery Cabinets
Modular Containment
Liebert BDC
™
Liebert CRV
Liebert MB™
Liebert PDU’s
Depending on heat load and power requirements, there may be multiple Liebert Thermal Management
units and multiple AC Power Protection and Distribution units.
Figure E-2 SmartAisle™ installation example
Liebert MB
modular
bus way
Roof Panel
(one of six)
Row-Based Equipment
(racks, Liebert CRV, Liebert
UPS, battery cabinet)
Liebert® CRV™ System Design Manual
Sliding Doors
140
Liebert CRV Intended Application
E.3 Placing Liebert CRV Units in Rows of Racks for Efficiency
This chapter provides examples of typical Liebert CRV installations. For best performance of the Liebert
CRV, observe the following guidelines:
• Create defined hot and cold aisles: eliminate gaps between server racks and utilize blanking plates to
fill open sections within the racks.
• Install the 2T rack temperature sensors on the front door of all equipment the Liebert CRV is cooling.
• Use walls or opposing racks to minimize the width of the hot and cold aisles; target 2 to 6 ft.
(0.6 to 1.8 m)
For site specific recommendations on how to optimize your space for row based cooling, contact your local
Emerson representative.
E.3.1 Row Placement
The Liebert CRV can be placed either at the end of a row or in between server racks. Locating a Liebert
CRV at the end of a row helps to isolate the end of the cold aisle from the surrounding space; protecting it
from hot air wrapping around the sides of the aisle. The 2T rack temperature sensors sample supply and
return air temperatures.
When deploying multiple Liebert CRV’s it is recommended that units be installed at the end of rows with
their baffles set to direct cold supply air toward the server equipment (Figure E-3). Depending on row
length, heat density and airflow requirements, additional cooling units can be installed throughout the row
with their baffles set to direct supply air left and right as it leaves the unit as seen in Figure E-4.
Cooling unit location within a row becomes less critical when deployed in SmartAisle™ containment, but it
is recommended that Liebert CRV’s be evenly spaced in each row. Using room barriers, such as walls
shown in Figure E-5 and Figure E-6, can be very effective in simulating aisle containment. When the
depths of a Liebert CRV and neighboring server rack are not the same, it is important to align the front
edges of the Liebert CRV with the front edges of the neighboring server racks to allow for proper air
distribution.
Figure E-3 One Liebert CRV, recommended placement
Hot Aisle
Hot Return Air
Liebert
CRV
Cold Supply Air
6 ft (1.8 m)
Maximum Distance
to Barrier
Cold Aisle
Figure E-4 One Liebert CRV, alternate placement
Hot Return Air
Hot Aisle
Liebert
CRV
Cold Aisle
Cold Supply Air
141
6 ft (1.8 m)
Maximum Distance
to Barrier
Liebert® CRV™ System Design Manual
Liebert CRV Intended Application
Figure E-5 Simulated aisle containment using room barriers—single row
Hot Aisle
Hot Return Air
Liebert
CRV
Cold
Supply
Air
6 ft (1.8 m)
Maximum Distance
to Barrier
Cold Aisle
Figure E-6 Simulated aisle containment using room barriers—multiple rows
Hot Aisle
Hot Return Air
Liebert
CRV
Cold Aisle
Cold Supply Air
Liebert
CRV
Barrier
Hot Aisle
Liebert® CRV™ System Design Manual
Cold Supply Air
142
Hot Return Air
Liebert CRV Intended Application
E.3.2 Number of Racks / Row Length
The number of racks the Liebert CRV can condition depends on the equipment’s heat load and airflow
requirements. It is recommended to oversize the Liebert CRV by approximately 20% to account for gaps
where cold air is lost through server racks, obstructions (pillars, people, partly open rack doors) reducing
air distribution efficiency and error in estimating server equipment heat and airflow requirements. When
deployed with SmartAisle™ cold aisle containment, the Liebert CRV can be more closely matched to the
server equipment needs.
When the Liebert CRV is significantly oversized, the cooling unit is able to effectively distribute air six to
seven racks away. Initially oversizing the unit provides for future data center flexibility with nearly no energy
consumption or footprint penalty. The intelligent Liebert iCOM® control and variable system components
allow the unit to minimize its operations without sacrificing environmental control.
Figure E-7 Number of racks, row length
2-7 racks
Hot Aisle
Hot Return Air
Liebert
CRV
Cold Supply Air
Cold Aisle
6 ft (1.8 m)
Maximum Distance
to Barrier
E.4 Placement in the Room
E.4.1 Depth of Hot Aisle-Cold Aisle
For optimal air distribution, use opposing racks or walls to clearly define the hot and cold aisles. This will
help to create an efficient and effective air circulation path from the cooling unit, to the server racks, and
back to the cooling unit. This helps to avoid cold air being lost to the room and prevents hot air from
entering the cold aisle. The supply air baffle has been optimized for aisle spacing of 2 to 6 feet wide.
Emerson’s® SmartAisle™ cold aisle containment system is recommended for maximum performance.
While the Liebert CRV is compatible with all forms of aisle containment, its control algorithms have been
optimized for partial and full cold aisle containment, allowing for increased operating efficiency and
reducing the number of 2T rack sensors.
Figure E-8 Depth of hot / cold aisles
Hot Return Air
Hot Aisle
Liebert
CRV
Cold Supply Air
Cold Aisle
143
6 ft (1.8 m)
Maximum Distance
to Barrier
Liebert® CRV™ System Design Manual
Liebert CRV Intended Application
E.5 Redundancy Arrangement
When laying out row-based units for redundancy, it is better to run all units at a lower operating level than
to shut off extra units. The units must be sufficiently sized to achieve the required cooling capacity if any of
the other units within the same row fail. Figure E-9 shows an example of N+1 redundancy properly
applied.
Figure E-9 Example of an application with one row and N+1 redundancy—left side unit failed
Hot Return Air
Hot Aisle
Liebert
CRV
Liebert
CRV
Cold Supply Air
OFF
6 ft (1.8 m)
Maximum Distance
to Barrier
Cold Aisle
Figure E-10 Example of an application with two rows and N+1 redundancy—unit at lower left failed
Hot Return Air
Hot Aisle
Liebert
CRV
Cold Supply Air
Cold Aisle
Cold Supply Air
Liebert
CRV
Hot Aisle
Liebert® CRV™ System Design Manual
144
Hot Return Air
Liebert CRV Intended Application
E.6 Liebert CRV Applied in SmartAisle™ Cold Aisle Containment
Using the Liebert CRV with the SmartAisle is always recommended but not required. It is an excellent
solution when attempting to cool widely varying heat loads, loads exceeding 10kW per rack, and when
seeking the highest efficiency systems. For additional information about the SmartAisle, see the Emerson®
Web site: www.emerson.com
Figure E-11 Liebert CRV placement with SmartAisle cold aisle containment—Liebert CRV’s
in center of two rows
Hot Aisle
Hot Return Air
Liebert
CRV
SmartAisle
Containment
Cold Supply Air
contained in
SmartAisle
Liebert
CRV
Hot Aisle
Hot Return Air
Figure E-12 Liebert CRV placement with SmartAisle™ cold aisle containment—Liebert CRV
at end of one row
Hot Return Air
Liebert
CRV
SmartAisle
Containment
145
Cold Supply Air
contained in
SmartAisle
Liebert® CRV™ System Design Manual
Liebert CRV Intended Application
E.7 Liebert CRV and Liebert XD™ Systems
When larger spaces (approximately 20 racks or more) require high-density cooling, row-based
Liebert CRV’s can be used to the support Liebert XD cooling systems. When used together, these systems
are more efficient than row-based units alone.
Figure E-13 illustrates the layout of a typical installation with two rows of racks and Liebert XDV™ modules.
Two Liebert CRV units are used to support the Liebert XD system and provide N+1 redundant humidity
control.
Figure E-13 Liebert CRV placement with Liebert XDV’s
Hot Return Air
Hot Aisle
Liebert
CRV
Liebert Liebert Liebert Liebert Liebert Liebert
XDV
XDV
XDV
XDV
XDV
XDV
Cold Supply Air
Cold Aisle
Refer to the Liebert XD
System Design manual,
SL-16655, for details on
configuring a Liebert XD unit
for use with a Liebert CRV.
Liebert Liebert Liebert Liebert Liebert Liebert
XDV
XDV
XDV
XDV
XDV
XDV
Liebert
CRV
Hot Aisle
Liebert® CRV™ System Design Manual
Cold Supply Air
146
Hot Return Air
Extra Airflow—Standard on 600 Series, Configurable on 300 Series
Appendix F: Extra Airflow—Standard on 600 Series,
Configurable on 300 Series
The Liebert CRV has the capability of providing additional airflow to correct for lower density air at higher
elevations and during emergency conditions. The Liebert CRV catalog cooling capacity is based on 100%
fan speed. During normal operation, the Liebert CRV will automatically modulate its airflow and cooling
capacity to satisfy the aisle’s requirements. The unit will automatically increase the fan speed above 100%
during the following conditions:
• In the event that one of the two fans fail, the functioning fan will increase to maximum speed to help
compensate for the lost airflow. The unit will automatically modulate its cooling capacity to avoid
undesirable conditions if necessary (coil freezing and high/low refrigerant head pressure conditions).
• If a different Liebert CRV experiences a problem that requires help from other nearby Liebert CRV’s,
the healthy units will automatically increase their fan speed above 100% to provide additional airflow
and/or cooling (requires Liebert iCOM® unit-to-unit Teamwork communication).
• A room can become extremely hot during a power failure when heat-generating server equipment
continues to run on backup power while air conditioners are without power. The Liebert CRV will
automatically utilize its extra airflow if a room is extremely hot after a power outage to cool the room
back to setpoint as fast as possible.
Table F-1
Nominal Airflow
Catalog Rating
100% Fan Speed (CFM)
Maximum Fan
Speed (CFM)
Extra Airflow
CRV 20kW DX
2455
2890
18%
CRV 35kW DX
3260
4005
23%
CRV 40kW CW
3325
3855
16%
Liebert CRV
Model
Figure F-1 Nominal Airflow
Normal Operation
Extra Airflow
4500
Total Airflow, CFM
4000
4500
3000
2500
2000
1500
1000
50
60
70
80
90
100
Fan Speed, Percentage
110
120
130
Liebert CRV 20kW DX
Liebert CRV 35kW DX
Liebert CRV 40kW CW
Because the fans are spinning at partial speed during normal operating conditions, the energy
consumption is much lower than the nameplate rating of the motors. This provides the same energy saving
benefits of using smaller size fans without the risk of running short on airflow.
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Extra Airflow—Standard on 600 Series, Configurable on 300 Series
Figure F-2 Nominal Energy Consumption of Both Fans
Normal Operation
Extra Airflow
Total Power Consumed by Both Fans, kW
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
50
60
70
80
90
100
Fan Speed, Percentage
110
Liebert CRV 20kW DX
Liebert CRV 35kW DX
Liebert CRV 40kW CW
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120
130
Model Number Nomenclature Detail
Appendix G: Model Number Nomenclature Detail
Model # Part 1
Model Details
1
2
3
4
5
6
7
8
9
10
11
12
13
C
R
0
2
0
R
A
1
C
7
S
H
1
Digits 1-2 - Unit Family
Model # Part 2
14
15
16
17
18
19
20
21
22
23
24
25
8
1
1
E
L
1
0
P
A
—
—
—
Digit 15 - Water/Glycol Valve Type
Liebert CRV = CR
1 = Two-Way Valve (W/G only) OR Default Air-Cooled Selection
Digits 3-5 - Nominal Capacity, kW
7 = Three-Way Valve (W/G only)
DX = 019 (300mm [12"] wide)
020, 035 (600mm [24"] wide)
H = Default CW Selection
CW = 032 (300mm [12"] wide
040 (600mm [24"] wide
1 = No Certification; Standard Color (Z-7021 Black)
Digit 6 - Row-Based, Unit Depth
R = 1100mm (43.4")
Digit 7 - System Type
Digit 16 - Enclosure
3 = Seismic Certification Level 1 (Sd = 0.8); Standard Unit Without
Internal Bracing; Standard Color (Z-7021 Black)
4 = Seismic Certification Level 2 (Sd = 2.0/2.5) With Internal bracing;
Standard Color (Z-7021 Black)
A = Air-Cooled
Digit 17 - High-Voltage Options
W = Water/Glycol-Cooled
L = No condensate pump, 5k SCCR, 300mm (12") 120V CW Only
C = Chilled Water-Cooled
5 = Condensate pump, 5k SCCR, 300mm (12") 120V CW Only
Digit 8 - Fan Type
M = No dual-float condensate pump (for units without humidifier), 65k
SCCR
1 = Variable Speed EC fans
Digit 9 - Power Supply
A = 460V / 3ph / 60Hz (600mm [24"])
P = Dual-float condensate Pump (for units with or without humidifier),
65k SCCR
C = 208V / 3ph / 60Hz (600mm [24"])
Digit 18 - Option Package
Y = 208-230V / 3ph / 60Hz (300mm [12"])
0 = None
P = 208-230V / 1ph / 60Hz (300mm [12"] ; Control transformer
can be tapped to provide 240V/1ph/60Hz)
H = Reheat and Humidifier Lockout Contact (600mm [24"] Only)
K = 120V / 1ph / 60Hz (300mm [12"])
3 = 460V / 3ph / 60Hz-Wye with Neutral required (300mm
[12"])
Digit 10 - Cooling System
C = Reheat and Humidifier Lockout and Additional Alarm Contact
(600mm [24"] Only)
D = Low Sound Package (600mm [24"] DX Only)
L = Low Sound Package and Reheat and Humidifier Lockout and
Additional Alarm Contact (600mm [24"] DX Only)
2 = Two-Way Valve (CW Models Only)
Digit 19 - Liebert IIntelliSlot™ Housing
3 = Three-way Valve (CW Models Only)
0 = No Cards
7 = R-410A Digital Scroll (Air-Cooled and 600mm [24"] W/G)
C = (1) Liebert SiteLink-E® Card
4 = Top Connections Only (300mm [12"] W/G only)
U = (1) Liebert IntelliSlot Unity DP™ Card
5 = Bottom Connections Only (300mm [12"] W/G only)
Digit 11 - Humidifier
6 = (1) Liebert IntelliSlot Unity DP Card and (1) Liebert SiteLink-E™
Card
0 = None
7= (2) Liebert IntelliSlot Unity DP Cards
S = Steam Generating Canister (600mm [24in.] models only)
Digit 20 - Future Options
Digit 12 - Control System
0 = None
H = Liebert iCOM (9-inch touch color screen display)
Digit 21 - Packaging With Ramp
Digit 13 - Reheat
P = Domestic
0 = None
S = Export (Seaworthy)
1 = Electric Reheat (600mm [24in.] models only)
Digit 22 - Special Features
Digit 14 - Air Filter
A = No SFAs, Standard Unit
A = 2" MERV 8 (300mm [12in.] models only)
X = SFA Included
C = 1/2" MERV 1 and Clog Filter Switch (300mm [12in.] models
only)
Digits 23-25 - Factory Configuration Number
8 = 4" MERV 8 + Clogged Filter Switch (600mm [24in.] models
only)
1. The 14-digit model number consists of the first 10 digits and last four
digits of the configuration number.
9 = 4" MERV 11 + Clogged Filter Switch (600mm [24in.] models
only)
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Guide Specifications—Row-Based Environmental Control System
Appendix H: Guide Specifications—
Row-Based Environmental Control System
Liebert® CRV™
ROW-BASED ENVIRONMENTAL CONTROL SYSTEM
GUIDE SPECIFICATIONS
1.0
1.1
GENERAL
SUMMARY
These specifications describe requirements for a Thermal Management system. The system shall be
designed to control temperature and humidity conditions in rooms containing electronic equipment, with
good insulation and vapor barrier. The manufacturer shall design and furnish all equipment to be fully
compatible with the heat dissipation requirements of the room.
1.2
DESIGN REQUIREMENTS
The Thermal Management system shall be a self-contained, factory-assembled Liebert unit with horizontal
airflow delivery. Standard 60Hz units shall be CSA (NRTL-C) certified.
The air-cooled condenser shall be a factory-assembled unit, complete with integral electrical panel,
designed for outdoor installation. The condenser shall be a draw-through design. Standard 60Hz units shall
be CSA (NRTL-C) certified.
1.3
SUBMITTALS
Submittals shall be provided with the proposal and shall include: Single-Line Diagrams; Dimensional,
Electrical, and Capacity Data; Piping and Electrical Connection Drawings.
2.0
2.1
PRODUCT
COOLING SYSTEM
2.1.1
Air-Cooled Refrigeration System
2.1.1.1
Refrigeration System
The single refrigeration circuit shall include a liquid line filter drier, a refrigerant sight glass with moisture
indicator, an adjustable, externally equalized expansion valve and a liquid line solenoid valve. The indoor
evaporator refrigerant piping shall be spun shut with a nitrogen holding charge. Field relief of the Schrader
valve shall indicate a leak-free system.
2.1.1.2
Hydrophilic-Coated Evaporator Coil
Models CR020, CR035
The direct expansion, tilted-slab cooling coil shall have 7.25 ft2 (0.674 m2) face area, four or five rows deep.
It shall be constructed of copper tubes and hydrophilic-coated aluminum fins. The hydrophilic coating shall
significantly improve the speed of condensate drainage from the fins and shall provide superior water
carryover resistance. Two stainless steel condensate drain pans shall be provided.
Model CR019
The direct expansion, slab cooling coil shall have 6.2ft2 (0.576 m2) face area, three rows deep. It shall be
constructed of copper tubes and hydrophilic-coated aluminum fins. The hydrophilic coating shall
significantly improve the speed of condensate drainage from the fins and shall provide superior water
carryover resistance. One stainless steel condensate drain pan shall be provided.
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Guide Specifications—Row-Based Environmental Control System
2.1.1.3
Compressor
The compressor shall be scroll-type with variable capacity operation from 20-100%, commonly known as a
digital scroll. The compressor solenoid valve shall unload the compressor to provide variable capacity
operation. The compressor shall have a suction gas-cooled motor, vibration isolators, internal thermal
overloads, manual reset high-pressure switch, rota-lock service valves, low-pressure and high-pressure
transducer, crankcase heater, internal centrifugal oil pump and an operating speed of 3500 rpm at 60Hz
(2900rpm @ 50Hz). The compressor shall be located outside the air stream and shall be removable and
serviceable from the rear of the unit.
2.1.1.4
R410A Refrigerant
The system shall be designed for use with R410A refrigerant, which meets the U.S. Clean Air Act for
phaseout of HCFC refrigerants.
2.1.1.5
Low Noise Package
The Low Noise Package shall reduce the level of sound emitted from the compressor. The package shall
consist of a 3/8 inch closed cell polymeric 4.5 - 8.5 lb/ft3 density compressor sound jacket that encloses the
compressor. Additional half-inch, closed cell polymeric 3 - 8 lb/ft3 density sound deadening material shall
be affixed to the underside of the Superior Service Access Panel located above the compressor and
attached to the inner side of the compressor compartment panels that face the hot and cold aisles. All
sound deadening material shall be non-shedding and located outside the air stream.
2.1.2
Water/Glycol-Cooled Refrigeration System
2.1.2.1
Refrigeration System
The single refrigeration circuit shall include a liquid line filter drier, an adjustable externally equalized
expansion valve and a liquid line solenoid valve. The water/glycol circuit shall be equipped with an
insulated, brazed-plate heat exchanger having a total pressure drop of ______ ft. (kPa) of water at a flow
rate of ______ GPM (l/s) with ______°F (°C) entering water/glycol temperature. The water piping shall be
threaded closed with a nitrogen holding charge. Field-relief of the Schrader valve shall indicate a leak-free
system.
2.1.2.2
Hydrophilic-Coated Evaporator Coil
Models CR020, CR035
The direct expansion, tilted-slab cooling coil shall have 7.25 ft2 (0.674 m2) face area, four or five rows deep.
It shall be constructed of copper tubes and hydrophilic-coated aluminum fins. The hydrophilic coating shall
significantly improve the speed of condensate drainage from the fins and shall provide superior water
carryover resistance. Two stainless steel condensate drain pans shall be provided.
Model CR019
The direct expansion, slab cooling coil shall have 6.2ft2 (0.576 m2) face area, three rows deep. It shall be
constructed of copper tubes and hydrophilic-coated aluminum fins. The hydrophilic coating shall
significantly improve the speed of condensate drainage from the fins and shall provide superior water
carryover resistance. One stainless steel condensate drain pan shall be provided.
2.1.2.3
Compressor
The compressor shall be scroll-type with variable capacity operation from 20-100%; commonly known as a
digital scroll. Compressor solenoid valve shall unload the compressor to provide variable capacity
operation. The compressor shall have a suction gas-cooled motor, vibration isolators, internal thermal
overloads, manual reset high-pressure switch, rota-lock service valves, low-pressure and high-pressure
transducer, crankcase heater, internal centrifugal oil pump and an operating speed of 3500 rpm at 60Hz
(2900rpm @ 50Hz). The compressor shall be located outside the air stream and shall be removable and
serviceable from the rear of the unit.
2.1.2.4
R410A Refrigerant
The system shall be designed for use with R410A refrigerant, which meets the U.S. Clean Air Act for
phaseout of HCFC refrigerants.
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Guide Specifications—Row-Based Environmental Control System
2.1.2.5
Low Noise Package
The Low Noise Package shall reduce the level of sound emitted from the compressor. The package shall
consist of a 3/8-inch, closed-cell polymeric 4.5 - 8.5 lb/ft3 density compressor sound jacket that encloses
the compressor. Additional half-inch, closed-cell polymeric 3 - 8 lb/ft3 density sound deadening material
shall be affixed to the underside of the Superior Service Access Panel located above the compressor and
attached to the inner side of the compressor compartment panels that face the hot and cold aisles. All
sound deadening material shall be non-shedding and located outside the air stream.
2.1.2.6
Modulating Valve
Two-Way
A two-way modulating valve shall control the water/glycol flow through the insulated, brazed-plate
condenser. The Liebert iCOM® shall manage the valve actuator movement to maintain the desired
condensing temperature for various entering water temperatures. The maximum differential pressure
across the closed valve shall be 43.5 PSI (300 kPa). Maximum system pressure shall be 230PSI (1,586
kPa).
Three-Way
A three-way modulating valve shall control the water/glycol flow through the insulated, brazed-plate
condenser. The Liebert iCOM® shall manage the valve actuator movement to maintain the desired
condensing temperature for various entering water temperatures. The maximum differential pressure
across the closed valve shall be 43.5 PSI (300 kPa). Maximum system pressure shall be 230PSI (1586
kPa).
2.1.2.7
Brazed-Plate Heat Exchanger
The heat exchanger shall be an insulated, brazed-plate type. The primary side shall be piped to a chilled
water source, and the secondary side shall be connected to the refrigeration system. A strainer must be
installed upstream of the Liebert CRV, on the primary (building) chilled water side.
2.1.3
Chilled Water System
The water circuit shall be designed to distribute water into the entire coil face area.
2.1.3.1
Hydrophilic-Coated Evaporator Coil
Model CR040
The chilled water tilted-slab cooling coil shall be 7.25 ft2 (0.674m2) face area, six rows deep. It shall be
constructed of copper tubes and hydrophilic-coated aluminum fins. The hydrophilic coating shall
significantly improve the speed of condensate drainage from the fins and shall provide superior water
carryover resistance. Two stainless steel condensate drain pans shall be provided. The water circuit shall
be threaded shut with a nitrogen holding charge. Field-relief of the Schrader valve shall indicate a leak-free
system.
Model CR032
The chilled water, rotated slab cooling coil shall be 7.8ft2 (0.72m2) face area, three rows deep . It shall be
constructed of copper tubes and hydrophilic-coated aluminum fins. The hydrophilic coating shall
significantly improve the speed of condensate drainage from the fins and shall provide superior water
carryover resistance. A stainless steel condensate drain pan shall be provided. The water circuit shall be
threaded shut with a nitrogen holding charge. Field-relief of the Schrader valve shall indicate a leak-free
system.
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Guide Specifications—Row-Based Environmental Control System
2.1.3.2
Modulating Valve
Two-Way Valve
A two-way modulating valve shall control the chilled water flow through the cooling coil. The Liebert iCOM®
shall manage the valve actuator movement to provide the desired amount of cooling for various entering
water temperatures. Cooling capacity shall be regulated by varying the chilled water flow. The maximum
differential pressure across the closed valve shall be 200 PSI (1379 kPa). Maximum system pressure shall
be 325PSI (2,241 kPa).
Three-Way Valve
A three-way modulating valve shall control the chilled water flow passing through the cooling coil. The
Liebert iCOM® shall manage the valve actuator movement in order to provide the desired amount of
cooling for various entering water temperatures. Cooling capacity shall be regulated by varying the chilled
water flow. The maximum differential pressure across the closed valve shall be 200 PSI (1,379 kPa).
Maximum system pressure shall be 325PSI (2,241 kPa).
2.2
FAN SECTION
Models CR020, CR035, CR040
The unit shall be equipped with two plug fans: direct-driven centrifugal fans with backward- curved blades
and electronically commutated DC motors; commonly referred to as EC plug fans. The fan speed shall be
variable and automatically regulated by the Liebert iCOM® through all modes of operation. Each fan shall
have a dedicated motor, fault monitoring circuitry and speed controller which provides a level of
redundancy. The impellers shall be made of steel and balanced. The EC plug fans shall be mounted on the
rear door. The entire fan assembly shall be capable of swinging out of the unit for accessibility. The fans
shall be located to blow air through the filters and tilted-slab cooling coil to ensure even air distribution and
maximum coil performance.
Model CR019
The unit shall be equipped with five plug fans: direct-driven centrifugal fans with backward-curved blades
and electronically commutated DC motors; commonly referred to as EC plug fans. The fan speed shall be
variable and automatically regulated by the Liebert iCOM through all modes of operation. Each fan shall
have a dedicated motor, fault monitoring circuitry and speed controller, which provides a level of
redundancy. The impellers shall be made of steel and balanced. The EC plug fans shall be mounted in the
front of the unit and draw air through the coil.
Model CR032
The unit shall be equipped with six plug fans: direct-driven centrifugal fans with backward-curved blades
and electronically commutated DC motors; commonly referred to as EC plug fans. The fan speed shall be
variable and automatically regulated by the Liebert iCOM through all modes of operation. Each fan shall
have a dedicated motor, fault monitoring circuitry and speed controller, which provides a level of
redundancy. The impellers shall be made of steel and balanced. The EC plug fans shall be mounted in the
front of the unit and draw air through the coil.
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Guide Specifications—Row-Based Environmental Control System
2.3
2.3.1
ADVANCED AIRFLOW MANAGEMENT
Supply Air Baffle System
Models CR020, CR035, CR040
A field-adjustable, modular supply air baffle system shall be located in the discharge air stream on the front
of the cabinet to direct air toward the equipment racks and balance airflow requirements within the row.
The six modular baffle segments shall be easily reconfigurable to redirect airflow as cooling requirements
change. Controlling the airflow prevents hot spots and maintains high return air temperatures by not
blowing cold air over racks or out the ends of aisles. By focusing the cold air where it is needed and
meeting the servers' requirements, the need for excessive airflow and energy consumption is eliminated.
Models CR019, CR032
A field-adjustable, modular supply air baffle system shall be located in the discharge air stream on the front
of the cabinet to direct air toward the equipment racks and balance airflow requirements within the row.
The five modular baffle segments shall be easily reconfigurable to redirect airflow as cooling requirements
change. Controlling the airflow prevents hot spots and maintains high return air temperatures by not
blowing cold air over racks or out the ends of aisles. By focusing the cold air where it is needed and
meeting the servers' requirements, the need for excessive airflow and energy consumption is eliminated.
2.4
2.4.1
CABINET CONSTRUCTION AND ACCESSIBILITY
Cabinet Construction
Models CR020, CR035, CR040
The exterior panels shall be 20 gauge steel and powder-coated with charcoal color paint to protect against
corrosion. The double-wall side panels separate the half-inch, 2.0 lb./ft3 insulation from the air stream and
increase unit rigidity. The unit shall be mounted on casters for quick installation and provided with leveling
feet. The perforated inlet and outlet panels shall have 81% open area. The rear door shall utilize a Knurr®
rack style handle and hinges to mirror the appearance of neighboring server racks.
Model CR019, CR032
The exterior panels of the unit shall be 20 gauge steel and powder-coated with charcoal color paint to
protect against corrosion and follow Knürr rack appearance guidelines to mirror the style of neighboring
equipment racks. The cabinet shall be mounted on casters for quick installation and provided with leveling
feet. Both doors shall have a powder-coated sheet metal frame with hexagonal perforations leaving 81% of
the door open to airflow for efficient cooling. The front and rear doors shall swing 170 degrees open, shall
be removable and shall feature a two-point latch. The powder-coat painted steel side panels shall be lined
with half-inch closed-cell polymeric insulation and secured using quarter-turn fasteners.
2.4.2
Serviceability
The cabinet shall be designed so all components are easily accessible for service and maintenance
through either the front or rear of the unit. Units that are not fully accessible from front and rear or not
serviceable in place shall be unacceptable.
Models CR020, CR035, CR040
The Superior Service Access Panel shall provide additional access to the top of the system components.
Side access shall not be required.
The variable speed EC plug fans shall be mounted on the rear door to provide access to all sides when
swung out of the unit. Units with a compressor, dual-float condensate pump and canister humidifier shall
have components conveniently mounted near the edge of the unit.
Model CR019, CR032
Side access shall not be required. Each of the variable speed fans shall be individually replaceable
through the front door of the unit. Units with a compressor and/or a condensate pump shall be conveniently
mounted near the edge of the unit.
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Guide Specifications—Row-Based Environmental Control System
2.4.3
Supply Air Baffle System
Models CR020, CR035, CR040
A field-adjustable, modular supply air baffle system shall be located in the discharge air stream on the front
of the cabinet to direct air toward the server racks and balance airflow requirements within the row. The six
modular baffle segments shall be easily reconfigurable to redirect airflow as cooling requirements change.
Controlling the airflow prevents hot spots and maintains high return air temperatures by not blowing cold
air over racks or out the ends of aisles. By focusing the cold air where it is needed and meeting the rack
equipment’s cooling requirements, the need for excessive airflow and energy consumption is eliminated.
Models CR019, CR032
A field-adjustable, modular supply air baffle system shall be located in the discharge air stream on the front
of the cabinet to direct air toward the server racks and balance airflow requirements within the row. The
five modular baffle segments shall be easily reconfigurable to redirect airflow as cooling requirements
change. Controlling the airflow prevents hot spots and maintains high return air temperatures by not
blowing cold air over racks or out the ends of aisles. By focusing the cold air where it is needed and
meeting the rack equipment’s cooling requirements, the need for excessive airflow and energy
consumption is eliminated.
2.5
LOCKING DISCONNECT SWITCH
Models CR020, CR035, CR040
A manual disconnect switch shall be mounted in the electrical panel and be capable of disrupting the flow
of power to the unit. The electric panel compartment shall be accessible only with the switch in the Off
position. It shall be located behind the Liebert iCOM® display door for quick access.
Models CR019, CR032
A manual disconnect switch shall be mounted in the electrical panel and be capable of disrupting the flow
of power to the unit. The electric panel compartment shall be accessible only with the switch in the Off
position. It shall be located behind the rear door for quick access.
2.6
SHORT CIRCUIT CURRENT RATING (SCCR)
Models CR019, CR020, CR035, CR040
The electrical panel shall provide at least 65,000A SCCR.
Model CR032 120V/1/60Hz
The electrical panel shall provide at least 5000A SCCR.
Model CR032 208-230/1/60Hz
The electrical panel shall provide at least 65,000A SCCR.
Model CR032 208-230/3/60Hz
The electrical panel shall provide at least 65,000A SCCR.
Model CR032 460/3/60Hz
The electrical panel shall provide at least 65,000A SCCR.
2.7
FILTRATION
Models CR020, CR035, CR040
MERV 8
The filter channel shall be an integral part of the system, located within the cabinet and serviceable from
the rear. The two filters shall be deep-pleated, 4 inches thick with an ASHRAE 52.2 MERV8 rating (30%
ASHRAE 52.1). A filter clog alarm shall be included. Mesh type, cleanable filters shall be unacceptable.
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Guide Specifications—Row-Based Environmental Control System
MERV 11
The filter channel shall be an integral part of the system, located within the cabinet and serviceable from
the rear. The two filters shall be deep-pleated, 4 inches thick with an ASHRAE 52.2 MERV11 rating (6065% ASHRAE 52.1). A filter clog alarm shall be included. Mesh type, cleanable filters shall be
unacceptable.
Models CR019, CR032
MERV 1
The two filters shall be an integral part of the system, located within the cabinet and serviceable from the
rear. The filters shall be washable, half-inch thick with an ASHRAE 52.2 MERV1 rating. A filter clog alarm
shall be included.
MERV 8
The two filters shall be an integral part of the system, located within the cabinet and serviceable from the
rear. The filters shall be washable, half-inch thick with an ASHRAE 52.2 MERV8 rating. A filter clog alarm
shall be included.
2.7.1
2.8
Extra Filter Set (Optional)
_______ extra set(s) of filters shall be provided per system.
ELECTRIC REHEAT
The low-watt density, 304/304, stainless steel, finned-tubular electric reheat coils shall be capable of
maintaining room dry bulb conditions when the system is calling for dehumidification. The reheat section
shall include UL/CSA recognized safety switches to protect the system from overheating. The capacity of
the reheat coils shall be controlled in one stage. The reheat elements shall be accessible from the front of
the cabinet.
2.9
STEAM GENERATING CANISTER HUMIDIFIER
A canister-type steam generating humidifier shall be factory-installed in the cooling unit and operated by
the Liebert iCOM®. It shall be complete with disposable cylinder, all supply and drain valves, steam
distributor and electronic controls. The need to change the canister shall be indicated on the Liebert iCOM.
The humidifier shall be designed to operate with water conductivity from 330 to 670 (60Hz) microS/cm.
The system shall automatically fill and drain as well as maintain the required water level based on
conductivity. An air-gap within the humidifier assembly shall prevent back-flow of the humidifier supply
water. The humidifier canister shall be removable from the rear of the cabinet.
2.10
CONDENSATE PUMP—MODELS CR020, CR035, CR040
The dual-float condensate pump shall have a minimum capacity of 6 GPM (22.7 l/min) at 30 ft. (9m) head.
The pump shall be complete with integral primary and secondary float switches, pump, motor assembly
and reservoir. The secondary float shall send a signal to the local alarm and shut down the unit upon high
water condition.
2.10
Condensate Pump—Models CR019
The dual-float condensate pump shall have a minimum capacity of 20 GPH (75.7 l/hr) at 16 ft. (4.9m) head.
The pump shall be complete with integral primary and secondary float switches, pump, motor assembly
and reservoir. The secondary float shall send a signal to the local alarm and shut down the unit upon high
water condition.
2.10
Condensate Pump—Models CR032
The dual-float condensate pump shall have a minimum capacity of 45 GPH (171 l/hr) at 13ft (4m) head.
The pump shall be complete with integral primary and secondary float switches, pump, motor assembly
and reservoir. The secondary float shall send a signal to the local alarm and shut down the unit upon high
water condition.
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Guide Specifications—Row-Based Environmental Control System
2.11
IBC/OSHPD SEISMIC CERTIFICATION CRV600MM (24 IN.) AND CRV300MM(12 IN.)
IBC/OSHPD Seismic Certification shall be provided with applicable bracing and field installation
instructions. Liebert CRV units shall bear a label certifying compliance with IBC/OSHPD requirements.
3.0
3.1
Control
LIEBERT ICOM® MICROPROCESSOR CONTROL
WITH 9-INCH COLOR TOUCHSCREEN
The Liebert iCOM shall be microprocessor-based with a 9" color touchscreen display and shall be
mounted in an ergonomic, aesthetically pleasing housing. The controls shall be menu-driven. The system
shall display user menus for active alarms, event log, graphic data, unit view/status overview (including the
monitoring of room conditions, operational status in percentage of each function, date and time), total run
hours, various sensors, display setup and service contacts. A password shall be required to make system
changes. Service menus shall include setpoints, standby settings (lead/lag), timers/sleep mode, alarm
setup, sensor calibration, maintenance/wellness settings, options setup, system/network setup, auxiliary
boards and diagnostics/service mode.
• Password Protection - The Liebert iCOM shall contain two unique passwords to protect against
unauthorized changes. An auto hide/show feature shall allow the user to see applicable information
based on the login used.
• Unit Backup and Restore - The user shall be able to create safe copies of important control
parameters. The Liebert iCOM shall have the capacity for the user to automatically backup unit
configuration settings to internal memory or USB storage drive. Configuration settings may be
transferred to another unit for a more streamlined unit startup.
• Parameter Download - The Liebert iCOM shall enable the user to download a report that lists
parameter names, factory default settings and user programmed settings in .csv format for remote
reference.
• Parameter Search - The Liebert iCOM shall have search fields for efficient navigation and parameter
lookup.
• Setup Wizards - The Liebert iCOM shall contain step-by-step tutorials or wizards to provide easy
setup of the control.
• Context-Sensitive Help - The Liebert iCOM shall have an on-board help database. The database
shall provide context-sensitive help to assist with setup and navigation of the menus.
• Display Setup - The user shall be able to configure the display information based on the specific
user's preference. Language, units of measure, screen contrast, home screen layout, back-light timer
and the hide/show of certain readouts shall be configurable through the display.
• Additional Readouts - The display shall enable the user to configure custom widgets on the main
screen. Widget options will include items such as fan speed, call for cooling, call for free-cooling,
maintenance status, call for hot water reheat, call for electric reheat, call for dehumidification, call for
humidification, airflow, static pressure, fluid flow rate and cooling capacity.
• Status LED's - The Liebert iCOM shall show the unit's operating status using an integral LED. The
LED shall indicate if the unit has an active alarm; if the unit has an active alarm that has been
acknowledged; or if the unit is On, Off or in standby status.
• Event Log - The Liebert iCOM shall automatically store the last 400 unit-only events (messages,
warnings, and alarms).
• Service Contact Information - The Liebert iCOM shall be able to store the local service or sales
contact information.
• Upgradeable - Liebert iCOM upgrades shall be performed through a USB connection.
• Timers/Sleep Mode - The menus shall allow various customer settings for turning the unit On or Off.
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• Menu Layout - The menus shall be divided into two main menus: User and Service. The User screen
shall contain the menus to access parameters required for basic unit control and setup. The Service
screen shall be designed for service personnel and shall provide access to advanced control setup
features and diagnostic information.
• Sensor Calibration - The menus shall allow unit sensors to be calibrated with external sensors.
• Maintenance/Wellness Settings - The menus shall allow reporting of potential component problems
before they occur.
• Options Setup - The menus shall provide operation settings for the installed components.
• Auxiliary Boards - The menus shall allow setup of optional expansion boards.
• Various Sensors: The menus shall allow setup and display of optional custom sensors. The control
shall include four customer accessible analog inputs for field-supplied sensors. The analog inputs shall
accept a 4 to 20mA signal. The user shall be able to change the input to 0 to 5VDC or 0 to 10VDC. The
gains for each analog input shall be programmable from the front display. The analog inputs shall be
able to be monitored from the front display.
• Diagnostics/Service Mode - The Liebert iCOM control shall be provided with self-diagnostics to aid in
troubleshooting. The microcontroller board shall be diagnosed and reported as pass/not pass. Control
inputs shall be indicated as On or Off at the front display. Control outputs shall be able to be turned On
or Off from the front display without using jumpers or a service terminal. Each control output shall be
indicated by an LED on a circuit board.
3.2
ALARMS
All unit alarms shall be annunciated through both audio and visual cues, clearly displayed on the screen,
automatically recorded in the event log and communicated to the customers Building Management
System/Building Automation System. The Liebert iCOM shall activate an audible and visual alarm in event
of any of the following conditions:
• High Temperature
• Low Temperature
• High Humidity
• Low Humidity
• EC Fan Fault
• Change Filters
• Loss of Air Flow
• Loss of Power
• Humidifier Problem
• High Head Pressure
• Low Suction Pressure
• Custom Alarms
Custom alarm inputs shall be provided to indicate facility-specific events. Custom alarms can be identified
with programmable labels. Frequently used alarm inputs include:
• Leak Under Floor
• Smoke Detected
• Standby Unit On
Each alarm (unit and custom) shall be separately enabled or disabled, selected to activate the common
alarm and programmed for a time delay of 0 to 255 seconds.
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3.3
LIEBERT ICOM® CONTROL METHODS AND OPTIONS
The Liebert iCOM shall be factory-set to allow precise monitoring and control of the condition of the air
entering and leaving the unit. This control shall include predictive methods to control air flow and cooling
capacity based control sensors installed. Proportional and Tunable PID shall also be user-selectable
options.
3.4
CONTROLLING SENSOR OPTIONS
Liebert iCOM shall be flexible in the sense that it shall allow for controlling the capacity and fan from
multiple different sensor selections. The sensor selections shall be:
Cooling Capacity
• Supply
• Remote
• Return
Fan Speed
• Supply
• Remote
• Return
• Manual (for diagnostic or to receive a signal from the BMS through the Liebert remote monitoring
devices or analog input)
3.4.1
3.4.2
3.5
Temperature Compensation
The Liebert iCOM shall be able to adjust the capacity output based on supply and return temperature
conditions to meet SLA guidelines while operating to highest efficiency.
Humidity Control
Dew point and relative humidity control methods shall be available (based on user preference) for humidity
control within the conditioned space
MULTI-UNIT COORDINATION
Liebert iCOM teamwork shall save energy by preventing multiple units in an area from operating in
opposing modes. Teamwork allows the control to optimize a group of connected cooling units equipped
with Liebert iCOM using the U2U (Unit-to-Unit) network. There shall be three modes of teamwork
operation:
• Teamwork Mode 1: Is best in small rooms with balanced heat loads. The controlling temperature and
humidity sensor readings of all units in operation (fan On) are collected to be used for an average or
worst case sensor reading (user selectable). The master unit shall send the operating requirements to
all operating units in the group. The control band (temperature, fan and humidity) is divided and shared
among the units in the group.
• Teamwork Mode 2: The Liebert iCOM calculates the worse-case demand for heating, cooling
humidification and dehumidification. Based on the greatest demand within the group, each unit
operates independently, meaning that the unit may respond to the thermal load and humidity
conditions based on the unit's controlling sensors.
• Teamwork Mode 3 - Optimized Aisle: May be employed in large and small rooms with varying heat
loads. Optimized Aisle is the most efficient teamwork mode that allows the unit to match cooling
capacity with heat load. In the Optimized Aisle mode, the fans operate in parallel. Fans can be
controlled exclusively by remote temperature or using static pressure with a secondary remote
temperature sensor(s) as an override to ensure that the inlet rack temperature is being met. Cooling
(Compressors) is controlled through unit supply air conditions. Liebert iCOM calculates the average or
worst-case sensor reading (user-selectable) for heating, cooling humidification and dehumidification.
Based on the demand within the group, units will be allowed to operate within that mode until room
conditions are satisfied.
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3.6
STANDBY LEAD-LAG
The Liebert iCOM® shall allow scheduled rotation to keep equal run time on units and provide automated
emergency rotation of operating and standby units.
3.7
STANDBY UNIT CASCADING
The Liebert iCOM cascade option shall allow the units to turn On and Off based on heat load when utilizing
Optimized Aisle, Teamwork Mode 3 and remote temperature sensors. Cascade mode dynamically
coordinates the fan speed to save energy and to meet the cooling demands. For instance, with a Liebert
iCOM group of six units and only 50% of the heat load, the Liebert iCOM shall operate only four units at
80% fan speed and leave the other two units in standby. As the heat load increases, the Liebert iCOM shall
automatically respond to the additional load and bring on another unit, increasing the units in operation to
five. As the heat load shifts up or down, the control shall meet the needs by cascading units On or putting
them into standby.
3.8
WIRED SUPPLY SENSOR
Each Liebert iCOM shall have one factory-supplied and connected supply air sensor that may be used as
a controlling sensor or reference. When multiple sensors are applied for control purposes, the user shall be
able to control based on a maximum or average temperature reading.
3.9
VIRTUAL MASTER
As part of the robust architecture of the Liebert iCOM control, it shall allow for a virtual master that
coordinates operation. The Virtual Master function shall provide smooth control operation if the group's
communication is compromised. When the lead unit, which is in charge of component staging in teamwork,
unit staging and standby rotation, becomes disconnected from the network, the Liebert iCOM shall
automatically assign a virtual master. The virtual master shall assume the same responsibilities as the
master until communication is restored.
3.10
COMPRESSOR SHORT CYCLE CONTROL
To help maximize the life of the compressor, there shall be start-to-next start delay for the compressor. The
control shall monitor the number of compressor starts in an hour. If the compressor starts more than 10
times in 60 minutes, the local display and remote monitoring shall notify the user through a Compressor 1
Short Cycle event.
3.11
LIEBERT MC™
Units may be matched to a premium efficiency condenser control with enhanced monitoring, alarming and
diagnostics. The condenser control shall have an automated, low-noise mode and fan reversal for cleaning
mode.
3.12
SYSTEM AUTO RESTART
The auto restart feature shall automatically restart the system after a power failure. Time delay shall be
programmable.
3.13
SEQUENTIAL LOAD ACTIVATION
On initial startup or restart after power failure, each operational load shall be sequenced with a minimum
delay of one second to minimize total inrush current.
3.14
LOW-PRESSURE MONITORING
Units shall ship standard with low-pressure transducers for monitoring compressor suction pressure. If the
pressure falls due to loss of charge or other mechanical cause, the corresponding circuit shall shut down to
prevent equipment damage. The user shall be notified of the low-pressure condition through the local
display and remote monitoring
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3.15
WINTER START TIME DELAY-AIR-COOLED MODELS
An adjustable software timer shall be provided to assist with compressor starting during cold weather.
When the compressor starts, the low-pressure input shall be ignored for the period set in the useradjustable timer. Once the time period has elapsed after the compressor start, the low-pressure input
should remain in the normal state. If the low-pressure input does not remain in the normal state when the
time delay has elapsed, the circuit shall lock out on low pressure. The low-pressure alarm shall be
announced on the local display and communicated to remote monitoring systems.
3.16
ADVANCED FREEZE PROTECTION
Units shall ship standard with advanced freeze protection enabled. The advanced freeze protection shall
monitor the pressure of the circuit using a transducer. The control shall interact with the fan and
compressor to prevent the unit coil from freezing if circuit suction pressure drops. If a freeze condition is
detected, the user shall be notified through the local display and remote monitoring systems
3.17
ADVANCED HIGH-PRESSURE PROTECTION-WATER/GLYCOL-COOLED MODELS
WITH DIGITAL SCROLL COMPRESSORS
When the compressor is initially activated, the system shall be monitored for high pressure. When high
pressure is detected, the control shall alter the compressor operation to reduce the system discharge
pressure, preventing circuit shut down. If the unit is unsuccessful in correcting the problem through this
interaction, an alarm shall occur and the affected compressor shall be immediately locked off. The control
shall re-enable the compressor when the pressure returns to a safe level.
3.18
REFRIGERANT PRESSURE TRANSDUCER FAILURE
The control shall monitor the high-side and low-side refrigerant pressure transducers. If the control senses
the transducer has failed, has been disconnected, has shorted or the reading has gone out of range, the
user shall be notified through an event on the local display and remote monitoring. The corresponding
circuit that the failure has occurred on shall be disabled to prevent unit damage.
3.19
OIL RETURN PROTECTION
The control shall monitor compressor operation and staging to ensure that liquid and hot gas velocity are
maintained for proper oil return to the compressor.
3.20
DIGITAL SCROLL HIGH-TEMPERATURE PROTECTION
The control shall monitor digital scroll temperature during unit operation. A compressor temperature limit
shall be imposed to help prevent damage to the compressor. If the temperature reaches the maximum
temperature limit, the compressor shall be locked out and an alarm shall be annunciated on the local
display and through monitoring. After the initial lockout, the control shall continue to monitor compressor
temperature during the off-cycle and re enable the circuit once a safe operating temperature is reached.
The control shall store the number of high temperature trips. The number of trips shall be accessible
through the local display.
3.21
DIGITAL SCROLL SENSOR FAILURE
The control shall monitor the status of the digital scroll sensor. If the control senses that the thermistor is
disconnected, shorted or the reading goes out of range, the user shall be notified through an event on the
local display and remote monitoring.
3.22
COMPRESSOR HIGH- AND LOW-TEMPERATURE LIMIT PROTECTION
The control shall monitor the return air to ensure that the compressor(s) are operated within the
manufacturer's defined window of operation. If the return air temperature deviates from the manufacturer's
window of operation, the Liebert iCOM shall automatically adjust to prevent damage to the cooling unit or
reduction in its reliability.
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3.23
COMPRESSOR RUN TIME MONITORING
The control shall log these compressor statistics:
• Number of compressor starts
• Run hours
• Average run time
• Starts per day
• Starts per day worst
• Number of high-pressure alarms
• Operating phase in which the high-pressure alarm occurred
• Number of low-pressure alarms
• Operating phase in which the low-pressure alarm occurred
• Number of compressor overloads
• Number of high-temperature alarms
The user shall have the ability to monitor compressor operating temperature and pressure from the local
display to be used as a diagnostic tool
3.24
RACK TEMPERATURE SENSORS
The Liebert CRV shall be provided with three 2T rack temperature sensors, each consisting of a vented
case with two temperature probes. The sensors shall provide real-time, direct feedback to the cooling unit
to optimize the amount of cooling and airflow provided. The sensor data shall be available to remote BMS
and monitoring systems. The sensor network shall consists of one CAN wire leaving the cooling unit and
connecting to a 2T sensor. Each remaining 2T sensor is connected to the previous sensor.
3.24.1 Additional Rack Temperature Sensor(s)
________ additional 2T rack temperature sensors shall be provided.
3.24.2 Additional CAN Cables for Rack Sensors
________ additional ____ feet long CAN cables shall be provided.
3.25
LIEBERT ICOM® WALL-MOUNT LARGE GRAPHIC DISPLAY LIEBERT VNSA™
PANEL
The Liebert iCOM Large Monochrome Graphic Display Kit shall include an ergonomic, aesthetically
pleasing housing, a 320x240 dot matrix graphical display and a 120V power supply. The wall-mount large
graphic display shall be used to allow remote location of a “System View” display and all features of the
Large Graphic User, Service and Advanced menus for use with Liebert iCOM-controlled products
connected for Unit-to-Unit (U2U) communication.
3.26
LIEBERT VNSA™ (OPTIONAL)
The Liebert vNSA network switch is designed for connecting multiple Ethernet-ready devices. The unit
shall have one or two eight-port switches, providing a total of eight or 16 Ethernet ports. The Liebert vNSA
shall have the capability to accept 100-240VAC single-phase input power for proper operation. A universal
power supply (12V, 1.5A) shall be installed inside a steel enclosure secured with a key lock with a hardwired connection for 120V or 230V operation. A Liebert iCOM Monochrome display shall be mounted on
the front. Liebert iCOM shall permit interconnected Liebert CRV units to communicate through two CAT5 or
better network patch cables with RJ-45 connectors to connect devices to available ports.
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The number of ports available for Ethernet-ready devices varies by the number of eight-port switches
included. The Liebert iCOM Monochrome display provided with the optional Liebert vNSA uses one port for
connection to the switch. The 16-port model uses two ports to interconnect the switches.
# of Ports Needed to Connect
Model
3.27
# Ports
To Liebert
iCOM Display
Upper & Lower
Switches
# Ports
Available
Maximum
Liebert CRV’s
that may be connected
vNSA8-iCOM-CR
8
1
N/A
7
3 Units
vNSA16-iCOM-CR
16
1
2
13
6 Units
COMMUNICATION INTERFACES
3.27.1 Remote Shutdown Terminal
The remote shutdown terminal shall provide a location to remotely shut down the unit, complying with the
National Fire Code.
3.27.2 Common Alarm Contact
The common alarm contact shall provide a set of normally open contacts for remote indication of unit
alarms.
3.27.3 Liebert CRV 600mm Cabinet Reheat / Humidifier Lockout
The reheat and humidifier lockout shall include the necessary relays to disable the reheat and humidifier
from an external 24V signal while on emergency power.
3.27.4 Liebert CRV 600mm Cabinet (Model 20, 35 and 40) One Extra Common Alarm
Contact
One additional contact (total of two sets) of normally open (n/o) contacts for remote indication of unit
alarms shall be provided.
3.27.5 Liebert IntelliSlot® Unity-DP™ Card
The Liebert IntelliSlot Unity Card (IS-UNITY-DP) shall provide ground fault isolated RS-485 Modbus,
BACnet IP and Modbus IP network connectivity to Building Management Systems for unit monitoring and
management. Also, it shall provide ground fault isolated 10/100 baseT Ethernet connectivity for unit
monitoring and management. The supported management interfaces include: SNMP for Network
Management Systems, HTTP for Web page viewing, SMTP for e-mail and SMS for mobile messaging. The
card shall support IP and 485 protocols simultaneously.
3.27.6 Liebert IntelliSlot® SiteLink-E® Card
The Liebert IntelliSlot SiteLink-E Card shall provide ground fault isolated connection to a Liebert SiteLink-E
for monitoring and management. Liebert SiteLink-E supports Emerson interfaces as a BACnet router that
provides the communication link between Liebert units and other protocols and modules. The Liebert
SiteLink-E is designed to communicate with Liebert equipment—cooling units, UPSs and PDUs—and
route the information over a BACnet, Modbus or LONWorks™ network to a Building Automation System
(BAS) workstation. This shall be required for communication with Liebert SiteScan® Web 4.0 or newer.
3.27.7 Liebert Nform® (Optional Advanced Monitoring)
The Critical Infrastructure Management software shall centrally monitor and manage distributed equipment
using the customer's existing network infrastructure. The system shall provide the Critical Infrastructure
Management and Monitoring for air conditioning (CRAC) systems, uninterruptible power supply (UPS)
systems, power distribution units (PDUs), static transfer switches (STS), direct current power systems
(DC), power distribution strips (PDUs), Alber® battery monitoring, rack enclosure monitoring, leak
detection systems and other critical infrastructure systems as specified. The system shall have an
architecture that allows up to 10,000 managed devices, including Liebert and third-party devices, in a
single-server installation.
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3.27.7.1 System Requirements
All material and equipment used shall be standard components, regularly manufactured and available and
not custom-designed especially for this project. All systems and components shall have previously been
thoroughly tested and proven in actual use before installation on this project.
The manufacturer will furnish or supply a site-specific Critical Infrastructure Management software system
based on customer requirements. The system must be a software-only solution; no substitutions shall be
accepted.
The system architecture shall consist of network interface cards that shall be installed in all critical
infrastructures that, at a minimum, support HTTP and SNMP simultaneously.
The system shall receive SNMP traps from managed equipment and display the alarm notification in a
graphical user interface.
The system shall be based on SNMP open protocols and shall integrate seamlessly with Emerson Network
Power, Aperture® software suite and Network Management Systems.
Open protocol support shall include:
• HTTP(s)
• TCP/IP/v4, TCP/IP/v6
• SNMPv1, SNMPv2
The system shall have the capability of being remotely monitored and managed 24 hours a day, 7 days
a week by the manufacturer.
The system shall have the ability to be deployed worldwide.
The system shall operate as a client-to-server application.
The Web interface of each managed device shall integrate directly into the system.
The system shall support enterprise-level databases including Microsoft® SQL™.
The system shall support exporting of all recorded parametric trend data.
The system shall operate on a server determined by the customer. Specific server brand or function is
not permissible.
The system shall support virtual server environments by default.
The system shall include, at no additional cost, one (1) year of Software Assurance.
3.27.7.2 Approved Products
The Critical Infrastructure Monitoring System shall be Liebert Nform® as manufactured by Emerson
Network Power®, Liebert Corporation. No substitutions shall be accepted.
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3.27.7.3 Scope of Work
Owner-Supplied Items
The owner shall furnish the following system components:
• Network (LAN) hardware and software required to provide an Ethernet backbone to be used for
transport of IP data packets from network interface cards installed in all equipment to the Critical
Infrastructure server and to the Liebert Nform workstations. These components may include hubs,
routers, cabling, network operating systems, firewalls, IP addresses, virtual private network (VPN) and
other components as required. The owner shall supply network drops for the Critical Infrastructure
server, workstation clients and all network-interfaced equipment.
• Dedicated Critical Infrastructure server meeting the following minimum requirements:
• Microsoft® Windows® 7, XP, 2003, Windows Vista® or Windows Server® 2008 operating system
• Pentium™ 3.0GHz single processor or better (1.8GHz dual processor or better recommended)
• 4 GB of RAM (memory) or better
• 40 GB hard drive (SCSI recommended)
• 10/100 BaseT network port or better
• Monitor / keyboard and mouse port as required for setup
• Standard USB ports
• CD or DVD-ROM drive for software installation (CD/DVD-RW suggested for installation and
backup)
• Critical Infrastructure server may be Virtual Environment compatible
• Critical Infrastructure Workstation PCs meeting the following minimum requirements:
• System should meet the minimum requirements for Microsoft Windows 7, XP, 2003, Vista or
Server 2008 operating systems.
• Microsoft Internet Explorer® v6.0 or higher
• 1 GB RAM
• Hard disk with 10GB free space
The owner shall supply the following to facilitate system implementation:
• IP addresses and subnet masks and other information as required to configure network devices
• A person as the nominated system owner for administrator purposes
• Secure location for hardware and server
Critical Infrastructure System Vendor Responsibilities
Provide hardware and software as listed.
• Critical Infrastructure software and licenses for server and workstation installations.
• Software Assurance for the first year at no additional cost.
• 7 x 24 system application and service support through a toll-free telephone number.
• Warranty (parts and labor) per the manufacturer’s warranty statement.
• Vendor shall be ISO 9001 listed for design and manufacture of environmental control systems for
Critical Monitoring and Control applications.
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3.27.8 Liebert Liqui-tect® 410 Point Leak Detection Sensor for Remote Mounting
A total of ________ (quantity) solid-state water sensor(s) with no moving parts and hermetically sealed to
keep out dust and dirt shall be provided. The Liebert Liqui-tect 410 (LT410) shall provide a single-point
detection of leaks. The point detection sensor shall have two gold-plated sensing probes to prevent
corrosion resistance and to provide accurate readings. The LT410 shall constantly monitor points for leaks,
internal faults and power failures and warn of any abnormal conditions. Mounting brackets shall allow for
sensor height adjustment and leveling. The LT410 shall provide two independent outputs to signal both a
local alarm panel and a remote building management system or external equipment. The LT410 shall be
rated for 24VAC, 50/60Hz and 0.10 amp.
3.27.9 Liebert Liqui-tect 460 Zone Leak Detection Module with Cable Kit for Remote
Mounting
A total of ________ (quantity) zone water sensor cables with no moving parts and hermetically sealed to
keep out dust and dirt shall be provided. The Liebert Liqui-tect 460 (LT460) shall provide a zone detection
of leaks. The LT460 shall constantly monitor points for leaks, internal faults and power failures and warn of
any abnormal conditions. LED’s shall provide status indication and also ensure the cable is properly
installed and operational under raised floors. The LT460 shall provide two independent outputs provide a
signal to a local alarm panel, Liebert environmental unit, remote building management system or external
equipment.
Liebert Liqui-tect 460 Module
The LT460 shall consist of a metal enclosure with a hinged top door providing access to the internal circuit
board for wiring termination and configuration of DIP switches. The LT460 shall monitor up to 100 feet
(30m) of connected LT500Y leak detection cable. The LT460 shall be rated for 24VAC, 50/60Hz and 0.12A.
LT500Y Leak Detection Cable
The cable material and construction shall allow the cable to lie flat when used with hold-down clips. The
LT500Y shall be plenum-rated and UL-listed for safe operation. Cables shall be available in lengths of 20,
25, 30, 35 and 45 feet (6, 7.6, 9, 10.6 and 13.7m).
4.0
4.1
4.1.1
Heat Rejection
AIR-COOLED MICROCHANNEL CONDENSER
Standard Features
The condenser shall consist of microchannel condenser coil(s), propeller fan(s) direct-driven by individual
fan motor(s), electrical controls, housing and mounting legs. The Liebert air-cooled condenser shall
provide positive refrigerant head pressure control to the indoor cooling unit by adjusting heat rejection
capacity. Microchannel coils shall provide superior heat transfer, reduce air-side pressure drop, increase
energy efficiency and shall significantly reduce the system refrigerant volume required. EC fans and fan
operating techniques shall provide reduced maximum sound levels. Various methods shall be available to
match indoor unit type, maximum outdoor design ambient and maximum sound requirements.
4.1.2
Condenser Coil
4.1.2.1
Aluminum Microchannel Coil
Liebert microchannel coils shall be constructed of aluminum microchannel tubes, fins and manifolds.
Tubes shall be flat and contain multiple, parallel flow microchannels and span between aluminum headers.
Full-depth, louvered aluminum fins shall fill spaces between the tubes. Tubes, fins and aluminum headers
shall be oven-brazed to form a complete refrigerant-to-air heat exchanger coil. Copper stub pipes shall be
electric resistance welded to aluminum coils and joints protected with polyolefin to seal joints from
corrosive environmental elements. Coil assemblies shall be factory leak-tested at a minimum of 300 psig
(2068kPag). Hot gas and liquid lines shall be copper and shall be brazed using nitrogen gas flow to the
stub pipes with spun-closed ends for customer piping connections. Complete coil/piping assembly shall be
then filled and sealed with an inert gas holding charge for shipment.
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4.1.2.2
Aluminum Microchannel Coil with E-Coat
Aluminum microchannel coil with E-coat shall provide a flexible epoxy coating to all coil surface areas
without material bridging between fins. E-coat shall increase coil corrosion protection and shall reduce
heat rejection capacity degradation to less than 10% after a severe 2000 hour 5% neutral salt spray test
(ref. ASTM B117). The coating process shall ensure complete coil encapsulation, and the color shall be
black.
4.1.3
Fan Motor/Blade Assembly
The fan motor/blade assembly shall have an external rotor motor, fan blades and fan/finger guard. Fan
blades shall be constructed of cast aluminum or glass-reinforced polymeric material. Fan guards shall be
heavy gauge, close-meshed steel wire, coated with a black, corrosion-resistant finish. Fan terminal blocks
shall be located in an IP54 enclosure located on the top of the fan motor. Fan assemblies shall be factorybalanced, tested before shipment and mounted securely to the condenser structure.
4.1.3.1
EC Fan Motor
The EC fan motors shall be electronically commutated for variable speed operation and shall have ball
bearings. The EC fans shall provide internal overload protection through built-in electronics. Each EC fan
motor shall have a built-in controller and communication module, linked via RS-485 communication wire to
each fan and the Premium Control Board, allowing each fan to receive and respond to precise fan speed
inputs from the Premium Control Board
4.1.4
Electrical Controls
Electrical controls and service connection terminals shall be provided and factory-wired inside the attached
control panel section. A locking disconnect switch shall be factory-mounted and wired to the electrical
panel and controlled via an externally mounted locking and lockable door handle. Only high-voltage supply
wiring and low-voltage indoor unit communication/interlock wiring shall be required at condenser
installation.
4.1.4.1
Premium Control
The EC fan/Premium Control System shall include an electronic control board, EC fan motor(s) with
internal overload protection, refrigerant and ambient temperature thermistors and refrigerant pressure
transducers. The control board shall receive an indoor unit run signal via field-supplied low-voltage
interlock wires to the compressor side switch via field-supplied CANbus communication wires from the
indoor unit’s Liebert iCOM® or via both. The control board shall use sensor and communication inputs to
maintain refrigerant pressure by controlling each EC fan on the same refrigerant circuit to the same speed.
4.1.5
Cabinet
The condenser cabinet shall be constructed of bright aluminum sheet and divided into individual fan
sections by full width baffles. Internal structural support members, including the coil support frame, shall be
galvanized steel for strength and corrosion resistance. Panel doors shall be provided on two sides of each
coil/fan section to permit coil cleaning. An electrical panel shall be contained inside a factory mounted,
NEMA 3R weatherproof electrical enclosure.
4.1.6
Mounting Legs
4.1.6.1
Standard Aluminum Legs
Aluminum legs shall be provided to mount the unit for vertical air discharge with rigging holes for hoisting
the unit into position. Standard height shall be 18in. (457mm).
4.1.6.2
Optional Galvanized Steel Legs with Bracing
Condensers shall be shipped with 36in. (914mm) mounting legs with stabilization bracing. Legs, bracing
and hardware shall be galvanized steel.
4.1.6.3
Optional Galvanized Steel Legs with Bracing
Condensers shall be shipped with 48in. (1219mm) mounting legs with stabilization bracing. Legs, bracing
and hardware shall be galvanized steel.
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4.1.6.4
Optional Galvanized Steel Legs with Bracing
Condensers shall be shipped with 60in. (1524mm) mounting legs with stabilization bracing. Legs, bracing
and hardware shall be galvanized steel.
4.1.7
Condenser Accessories
4.1.7.1
Liebert Lee-Temp™ Receiver Kit
4.1.7.2
Fusible Plug Kit
Liebert Lee-Temp Receiver Kit shall contain an insulated, heated receiver tank with sight glasses,
mounting plate, mounting hardware, pressure relief valve, rota-lock valve for refrigerant charge isolation
and piping assembly with head pressure operated three-way valve and check valve. Components shall be
field-assembled to the condenser. The three-way valve shall sense refrigerant head pressure and adjust
the flooding charge in the condenser coil to adjust the condenser heat rejection capacity.
A fusible plug kit shall be field-installed on the liquid line for compliance with building codes requiring
refrigerant relief during high temperature and building fire conditions.
4.1.7.3
IBC/OSHPD Seismic Certification and IBC Wind/Snow Load Compliant
IBC/OSHPD Seismic Certification and IBC Wind/Snow Load Compliant condensers shall be provided with
any applicable bracing and field installation instructions. Condensers shall bear a label certifying
compliance with IBC/OSHPD requirements.
4.2
DRYCOOLER
The Liebert drycooler is a low-profile, direct-drive propeller fan-type air-cooled fluid cooling unit. The
drycooler shall be constructed with an aluminum cabinet and a copper-tube aluminum fin coil. All electrical
connections and controls shall be enclosed in an integral, weatherproof section of the drycooler. The
drycooler shall be designed for ______°F (°C) ambient.
4.2.1
4.2.2
Fan Cycling Control
Two or more thermostats shall be employed on drycoolers with two or more fans to cycle fans or groups of
fans in response to leaving fluid temperatures. The thermostat setpoints shall be listed on the factorysupplied schematic.
Pump Controls
Single Pump Option: Pump controls for a single glycol pump up to 7.5 hp shall be incorporated into the
same integral electrical panel as the drycooler fan controls and may include fuses or circuit breakers as
required for the pump motor. Pump voltage, phase and frequency shall be the same as the drycooler
voltage, phase and frequency.
Dual Pump Option: Pump controls for a dual glycol pump system shall operate one pump as primary and
the second pump shall operate as a standby pump. Pump controls shall be incorporated into the same
integral electrical panel controlling drycooler fans. A field-supplied flow switch shall sense loss of flow and
switch to the standby pump for continuous system operation. An internal switch shall allow manual
selection of the primary (lead) pump.
4.2.3
Pump Package
4.2.3.1
Single Pump Package
This system shall be provided with a centrifugal pump mounted in a weatherproof and vented enclosure.
The pump shall be rated for ___ GPM (___ l/m) at ___ ft. (___ kPa) of head and operate on ___ volt, 3phase, ___ Hz.
4.2.3.2
2.18.2.3.1Dual Pump Package
The dual pump package shall include pumps, enclosure and field-mounted flow switch. The standby pump
shall automatically start up on failure of the lead pump by drycooler pump controls or by a separate factorywired control box and shall include a lead/ lag switch for the pumps. Each pump shall be rated for _______
GPM (___ l/s) at ___ ft. (___ kPa) of head.
169
Liebert® CRV™ System Design Manual
Guide Specifications—Row-Based Environmental Control System
5.0
5.1
5.1.1
5.1.2
5.1.3
5.1.4
5.1.5
EXECUTION
INSTALLATION OF THERMAL MANAGEMENT UNITS
General
Install cooling units in accordance with manufacturer’s installation instructions. Install units plumb and
level, firmly anchored in locations indicated and maintain manufacturer’s recommended clearances.
Electrical Wiring
Install and connect electrical devices furnished by manufacturer but not specified to be factory-mounted.
Furnish copy of manufacturer’s electrical connection diagram submittal to electrical contractor.
Piping Connections
Install and connect devices furnished by manufacturer but not specified to be factory-mounted. Furnish
copy of manufacturer’s piping connection diagram submittal to piping contractor.
Refrigerant Charging
Charge completed cooling system in accordance with manufacturer’s refrigerant charging instructions.
Field Quality Control
Start up cooling units in accordance with manufacturer’s startup instructions. Test controls and
demonstrate compliance with requirements. These specifications describe requirements for a computer
room environmental control system. The system shall be designed to maintain temperature and humidity
conditions in the rooms containing electronic equipment.
The manufacturer shall design and furnish all equipment to be fully compatible with heat dissipation
requirements.
5.1.6
5.2
5.2.1
5.2.2
Supply and Drain Water Piping
Connect water supply and drains to air conditioning unit. Provide pitch and trap as manufacturer's
instructions and local codes require.
SEISMIC IBC/OSHPD
Liebert CRV
Install unit in accordance with manufacturer’s installation instructions provided with seismic option. Firmly
anchor maintaining manufacturer’s recommended clearances. Mounting requirement details such as
anchor brand, type, embedment depth, edge spacing, anchor-to-anchor spacing, concrete strength,
special inspection and attachment to non-building structures must be outlined and approved by the
Engineer of Record for the projection or building. Wiring and piping connections must permit movement in
three dimensions and isolate the unit from field connections. Electrical conduit shall be flexible, having at
least one bend between the rigid connection at the unit cabinet and the connection to rigid conduit or
foundation. The piping flexible connection or loop must be suitable for the operation pressure and
temperature of the system. Furnish copy of manufacturer’s piping connection diagram submittal to piping
contractor.
Liebert MC
Install condenser in accordance with manufacturer’s installation instructions provided with seismic option.
Firmly anchor maintaining manufacturer’s recommended clearances. Mounting requirement details such
as anchor brand, type, embedment depth, edge spacing, anchor-to-anchor spacing, concrete strength,
special inspection and attachment to non-building structures must be outlined and approved by the
Engineer of Record for the projection or building. Wiring and piping connections must permit movement in
three dimensions and isolate the unit from field connections. Electrical conduit shall be flexible, having at
least one bend between the rigid connection at the unit cabinet and the connection to rigid conduit or
foundation. The piping flexible connection or loop must be suitable for the operation pressure and
temperature of the system. Furnish copy of manufacturer’s piping connection diagram submittal to piping
contractor.
Liebert® CRV™ System Design Manual
170
COMPLIANCE WITH EUROPEAN UNION DIRECTIVES
Fabbricante – Manufacturer – Hersteller – Fabricant – Fabricante
Fabricante – Tillverkare – Fabrikant – Valmistaja – Produsent
Fabrikant – Κατασκευαστής – Producent
Liebert Corporation
1050 Dearborn Drive
P.O. Box 29186
Columbus, OH 43229
USA
Il Produttore dichiara che, se munito di marchio CE, il prodotto è conforme alle direttive dell'Unione
europea:
The Manufacturer hereby declares that this product, when bearing the CE mark, conforms to the European
Union directives:
Der Hersteller erklärt hiermit, dass das vorliegende Produkt, sollte es die CE-Kennzeichnung tragen, den
folgenden Richtlinien der Europäischen Union entspricht:
Le fabricant déclare par la présente que ce produit, portant la marque CE, est conforme aux directives de
l'Union européenne :
El fabricante declara por la presente que si este producto lleva el marcado CE es conforme con las directivas
de la Unión Europea:
O fabricante declara por este meio que este produto, quando ostenta a marca CE, está em conformidade
com as directivas da União Europeia:
Tillverkaren tillkännager härmed att den här produkten, när den är CE-märkt, överensstämmer med EU:s
direktiv:
De fabrikant verklaart hierbij dat dit product, indien het van de CE-markering is voorzien, conform de EUrichtlijnen is:
Valmistaja vakuuttaa täten, että mikäli tuotteessa on CE-merkintä, se täyttää seuraavien EU-direktiivien
vaatimukset:
Produsenten erklærer herved at dette produktet, når det er CE-merket, er i samsvar med EU-direktiver:
Producenten erklærer hermed, at dette produkt overholder EU's direktiver, når det bærer CE-mærket:
Ο Κατασκευαστής δηλώνει ότι το προϊόν αυτό, το οποίο φέρει σήμανση CE, είναι σύμμορφο με τις
οδηγίες της Ε.Ε.:
2006/42/EC; 2004/108/EC; 2006/95/EC; 97/23/EC
Technical Support / Service
Web Site
www.liebert.com
Monitoring
liebert.monitoring@emerson.com
800-222-5877
Outside North America: +00800 1155 4499
Single-Phase UPS & Server Cabinets
liebert.upstech@emerson.com
800-222-5877
Outside North America: +00800 1155 4499
Three-Phase UPS & Power Systems
800-543-2378
Outside North America: 614-841-6598
Environmental Systems
800-543-2778
Outside the United States: 614-888-0246
Locations
United States
1050 Dearborn Drive
P.O. Box 29186
Columbus, OH 43229
Europe
Via Leonardo Da Vinci 8
Zona Industriale Tognana
35028 Piove Di Sacco (PD) Italy
+39 049 9719 111
Fax: +39 049 5841 257
Asia
7/F, Dah Sing Financial Centre
108 Gloucester Road, Wanchai
Hong Kong
852 2572220
Fax: 852 28029250
While every precaution has been taken to ensure the accuracy and completeness of this literature, Liebert Corporation assumes no responsibility and disclaims
all liability for damages resulting from use of this information or for any errors or omissions.
© 2016 Liebert Corporation
All rights reserved throughout the world.
Specifications subject to changewithout notice.
® Liebert is a registered trademark of Liebert Corporation. All names referred to are trademarks or registered trademarks of their respective owners.
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