RAMAPO COLLEGE OF NEW JERSEY
PHASE II HOUSING REHABILITATION
CCA0803
2012
SECTION 238119 - SELF-CONTAINED AIR-CONDITIONERS
PART 1 - GENERAL
1.1
RELATED DOCUMENTS
A.
1.2
Drawings and general provisions of the Contract, including General and Supplementary Conditions
and Division 01 Specification Sections, apply to this Section.
SUMMARY
A.
This Section includes packaged air-conditioning units with refrigerant compressors, gas fired heater
and controls, intended for indoor installations, with integral air-cooled condenser s.
B.
Related Sections include the following:
1.
1.3
Division 23 Section "
SUBMITTALS
A.
Product Data: Include rated capacities, furnished specialties, and accessories for each type of
product indicated.
B.
Shop Drawings: Diagram power, and control wiring.
C.
Samples for Initial Selection: For units with factory-applied color finishes.
D.
Field quality-control test reports.
E.
Operation and Maintenance Data: For self-contained air-conditioners to include in emergency,
operation, and maintenance manuals.
F.
Warranty: Special warranty specified in this Section.
1.4
QUALITY ASSURANCE
A.
Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70,
Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for
intended use.
B.
ASHRAE/IESNA 90.1-2004 Compliance: Applicable requirements in ASHRAE/IESNA 90.1-2004,
Section 6 - "Heating, Ventilating, and Air-Conditioning."
1.5
WARRANTY
A.
General Warranty: Special warranty specified in this Article shall not deprive Owner of other rights
Owner may have under other provisions of the Contract Documents and shall be in addition to, and
run concurrent with, other warranties made by Contractor under requirements of the Contract
Documents.
B.
Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace
components of self-contained air-conditioners that fail in materials or workmanship within specified
warranty period.
1.
Warranty Period: Five years on compressor and heat exchanger from date of Substantial
Completion.
SELF-CONTAINED AIR-CONDITIONERS
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RAMAPO COLLEGE OF NEW JERSEY
PHASE II HOUSING REHABILITATION
1.6
CCA0803
2012
EXTRA MATERIALS
A.
Furnish extra materials described below that match products installed and that are packaged with
protective covering for storage and identified with labels describing contents.
1.
Filters: One set of filters for each unit.
PART 2 - PRODUCTS
2.1
MANUFACTURERS
A.
Manufacturers
1.
2.2
Integral Air-Cooled, Gas Fired Wall-Mount Self-Contained Air-Conditioners
a.
Skymark
b.
Suburban
c.
Magic-Pack
d.
Engineer approved equal.
PACKAGED UNITS
A.
B.
2.3
Description: Self-contained, factory-assembled and -wired unit; consisting of cabinet, compressor,
evaporator fan, evaporator coil, air filters, and controls; and fully charged with refrigerant and oil.
1.
Condenser: Integral air-cooled condenser.
2.
Gas-fired heat exchanger
Disconnect Switch: Factory mounted on equipment.
CABINET
A.
Frame and Panels: Structural-steel frame with galvanized-steel panels with baked-enamel finish in
color selected by Architect, and with access doors or panels.
B.
Insulation: Minimum 1-inch- thick, acoustic duct liner on cabinet interior and control panel.
C.
Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in
ASHRAE 62.1-2004.
2.4
EVAPORATOR FAN
A.
Material: Galvanized steel.
B.
Configuration: Double-width, double-inlet, forward-curved centrifugal fan; statically and dynamically
balanced.
C.
Drive: Direct, with fan and motor resiliently mounted.
D.
Motors: Multispeed, PSC type.
2.5
COMPRESSOR
A.
Description: Hermetically sealed, 3600 rpm maximum, and resiliently mounted with positive
lubrication and internal motor protection.
SELF-CONTAINED AIR-CONDITIONERS
238119 - 2
RAMAPO COLLEGE OF NEW JERSEY
PHASE II HOUSING REHABILITATION
B.
2.6
CCA0803
2012
Compressor Type: Scroll.
EVAPORATOR COIL
A.
Direct-Expansion Coil: Seamless copper tubes expanded into aluminum fins.
1.
B.
2.7
Corrosion-Resistant Treatment: Phenolic coating applied with multiple dips and baked.
Refrigerant Circuits: A separate circuit for each compressor, with externally equalized thermalexpansion valve, filter-dryer, sight glass, high-pressure refrigerant switch and charging valves.
REFRIGERATION SYSTEM
A.
Description: Factory assembled and tested, and charged with CFC-free refrigerant; consisting of
piping and accessories connecting compressor, evaporator coil, and condenser coil, and including
the following:
1.
Expansion valve with replaceable thermostatic element.
2.
Refrigerant dryer.
3.
High-pressure switch.
4.
Low-pressure switch.
5.
Thermostat for coil freeze-up protection during low ambient temperature operation or loss of
air.
6.
Low ambient switch.
B.
Refrigerant R-410A
2.8
.
HEATING
A. The gas-fired heat exchanger is a tubular aluminized steel design with no-weld construction. The
burner section is of the in-shot design, with hot surface ignition. All air for combustion is drawn
through the outside wall grille. Flue gases are power vented through the upper wall grille section.
Furnace controls include a high limit switch, flame roll out sensor, ignition sensor, ventor motor
safety switch, and an indoor blower control module. The unit controls are factory wired to a low voltage terminal strip, for connection to a single stage heat/cool thermostat
2.9
AIR FILTERS
A.
2.10
Disposable Filters: 1-inch- thick, glass-fiber, flat panel filters.
CONTROLS
A.
Control Package: Factory wired, including contactor, high- and low-pressure cutouts, internalwinding thermostat for compressor, control-circuit transformer, and noncycling reset relay.
B.
Time-Delay Relay: Five-minute delay to prevent compressor cycling.
C.
Adjustable Thermostat: Remote to control the following:
1.
2.
3.
4.
Supply fan.
Compressor.
Condenser.
Gas Heater.
D.
System Selector Switch: Off-heat-auto-cool.
E.
Fan Control Switch: Auto-on.
F.
Time Clock: Cycle unit on and off.
SELF-CONTAINED AIR-CONDITIONERS
238119 - 3
RAMAPO COLLEGE OF NEW JERSEY
PHASE II HOUSING REHABILITATION
CCA0803
2012
PART 3 - EXECUTION
3.1
INSTALLATION
A.
Install units level and plumb.
B.
Anchor units to structure.
C.
Install seismic restraints.
3.2
CONNECTIONS
A.
Piping installation requirements are specified in other Division 23 Sections.
general arrangement of piping, fittings, and specialties.
B.
Install piping adjacent to unit to allow service and maintenance.
C.
Duct Connections: Duct installation requirements are specified in Division 23 Section "Metal Ducts."
Drawings indicate the general arrangement of ducts. Connect supply and return ducts to selfcontained air-conditioners with flexible duct connectors. Flexible duct connectors are specified in
Division 23 Section "Air Duct Accessories."
D.
Ground equipment according to Division 26 Section "Grounding and Bonding for Electrical
Systems."
E.
Electrical Connections: Comply with requirements in Division 26 Sections for power wiring,
3.3
Drawings indicate
FIELD QUALITY CONTROL
A.
Manufacturer's Field Service: Engage a factory-authorized service representative to inspect, test,
and adjust field-assembled components and equipment installation, including connections, and to
assist in field testing. Report results in writing.
B.
Perform the following field tests and inspections and prepare test reports:
1.
Operational Test: After electrical circuitry has been energized, start units to confirm proper
motor rotation and unit operation.
2.
Test and adjust controls and safeties. Replace damaged and malfunctioning controls and
equipment.
C.
Remove and replace malfunctioning units and retest as specified above.
3.4
STARTUP SERVICE
A.
3.5
Engage a factory-authorized service representative to perform startup service.
1.
Complete installation and startup checks according to manufacturer's written instructions.
DEMONSTRATION
A.
Engage a factory-authorized service representative to train Owner's maintenance personnel to
adjust, operate, and maintain units. Refer to Division 01 Section "Demonstration and Training."
END OF SECTION 238119
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