MCP15-410.2
September, 2012
SPECIFICATIONS
Commercial Packaged (DX) Ventilation Unit, model MPR
Optional Energy Recovery Module, model ERM
General Specifications
1.
The base model MPR, Packaged Rooftop Commercial Ventilation Unit, shall include compressors, evaporator coils, filters,
supply fan, dampers, air-cooled condenser coils, condenser fans, and unit controls.
2.
Unit shall be factory assembled and tested including leak testing of the coils, pressure testing of the refrigeration circuit, and
run testing of the completed unit.
3.
Unit shall have decals/tags to indicate lifting and rigging, service areas and caution areas for safety and to assist service
personnel.
4.
Unit electrical and controls components shall be labeled.
5.
Installation and Service Manual shall be supplied within the unit.
6.
Unit nameplate shall be affixed to the exterior of the unit.
Standards
1.
Unit shall be safety certified by ETL in accordance with UL Standard 1995/CSA C22.2 No. 236, Safety Standard for Heating
and Cooling Equipment. Unit nameplate shall include the ETL/ETL Canada label.
2.
Gas-fired furnace options shall be certified in accordance with ANSI Z83.8/CSA 2.6, Safety Standard Gas-Fired Furnaces.
3.
Unit Nominal Energy Efficiency Ratio (EER) shall be equal to or greater than prescribed by
4.
a.
ASHRAE 90.1, Energy Efficient Design of New Buildings except Low-Rise Residential Buildings
b.
ASHRAE 189.1, Standard for the Design of High-Performance Green Buildings except Low-Rise Residential Buildings.
Unit Nominal Integrated Energy Efficiency Ratio (IEER) shall be equal to or greater than prescribed by ASHRAE 90.1, Energy
Efficient Design of New Buildings except Low-Rise Residential Buildings and ASHRAE 189.1, Standard for the Design of HighPerformance Green Buildings except Low-Rise Residential Buildings.
5.
Unit shall be tested in accordance with AHRI Standard 340/360, Performance Rating of Commercial and Industrial Unitary AirConditioning and Heat Pump Equipment.
6.
Unit shall be tested in accordance with proposed AHRI Standard 920P, DX Dedicated Outside Air Systems – Testing and
Rating for Performance.
Electrical Power
1.
All units to have single point power blocks with grounding lugs.
2.
All wiring is to be run in conduit that is located between the unit ceiling liner and roof casing with drops from the ceiling to keep
wires clear of other internal components, prevent accidental damage to wiring during service, and improve cleanliness of unit
interior.
3.
Wiring diagram shall match factory installed wiring and shall be affixed to the interior of the control compartment access door.
4.
Units to be designed for use on a supply voltage of
a.
208V/60Hz/3ph
b.
230V/60Hz/3ph
c.
460V/60Hz/3ph
Modine Manufacturing Company has a continuous product improvement program,
and therefore reserves the right to change design and specifications without notice.
SPECIFICATIONS – Commercial Packaged Ventilation & Energy Recovery
d.
575V/60Hz/3ph
5.
(Option) Unit shall be provided with a factory installed and wired, dead-front, non-fused disconnect switch.
6.
(Option) Unit shall be provided with a factory installed and wired main circuit breaker.
7.
(Option) Unit shall be provided with phase and brown-out protection to shut down all motors in the unit, including
compressors, if the phases are more than 10% out of balance on voltage, or the voltage is more than 10% under design
voltage, or on phase reversal.
8.
(Option) Unit shall be provided with a factory installed and wired 115 volt, 13 amp ground fault service receptacle mounted on
the exterior of the unit casing and powered by a 1.5kVA transformer with disconnect switch in the unit control panel.
9.
(Option) Unit shall be provided with a factory installed and wired 115 volt, 15 amp ground fault service receptacle mounted on
the exterior of the unit casing and powered by a field wired 115V power source by others.
10. (Option) Unit shall be provided with auxiliary contacts on the motor starter for the supply blower motor. These contacts shall
be wired to a low voltage terminal block and will close when the supply fans are energized to initiate a control circuit by others,
such as an external exhaust fan circuit.
11. (Option) Unit shall be provided with a factory mounted control relay whose contacts shall be wired to a low voltage terminal
block and will close when the supply fan motor variable frequency drive is energized to initiate a control circuit by others, such
as an external exhaust fan circuit.
Casing
1.
The casing shall be designed for outdoor application with a fully weatherproof cabinet.
2.
The unit shall have internal cabinet access on the left and condensing section on the right, as viewed when facing the inlet of
the unit, air blowing at your back.
3.
Exterior casing parts shall be 18 gauge aluminized steel with an electrostatically applied polyester powdercoat paint finish.
Paint shall be applied post fabrication, but before assembly to ensure complete paint coverage on all surfaces of each part,
including the inside of punched holes. Pre-painted sheet metal or post assembly applied paint is not acceptable. Paint color
shall be standard Modine Commercial Gray Green.
4.
Unit shall be internally insulated on all surfaces with exterior exposure, including walls, floor, and ceiling. Insulation shall be 2”
faced fiberglass, 1-1/2 lb. density and be completely encased within standard 20 gauge galvanized steel liners. These liners
shall provide double wall construction that complies with ASHRAE 62.1 to prevent mold growth, allow easy cleaning, and
protection of the insulation from the airstream and from entering the airstream.
5.
Roof shall have a standing roof seam for maximum roof rigidity and prevention of standing water and perimeter drip edges to
prevent water from dripping into the access doors.
6.
Access to filters, blower, heating section, and other items needing periodic inspection or maintenance shall be through hinged
access doors with quarter turn latches. Full length hinges are to be painted to match the unit color and the hinge pin is to be
stainless steel to prevent corrosion and rust staining. Doors are to have full perimeter gasketing.
7.
Unit shall be designed to reduce air leakage and infiltration through the cabinet. Continuous sealing shall be included between
panels and between access doors and openings to reduce air leakage. Refrigerant piping and electrical conduit through
cabinet panels shall include sealing to reduce air leakage.
8.
Unit shall include double nut lifting eye bolts on the top of the unit. The double nut will allow free rotation and secure lockdown of the eye bolts to accommodate varying spreader bar lifting orientations.
9.
2
Unit shall include a field assembled and installed inlet rainhood and a factory mounted inlet birdscreen.
MCP15-410.2
SPECIFICATIONS – Commercial Packaged Ventilation & Energy Recovery
Filtration
1.
The unit shall include pleated disposable 2” thick MERV 10 rated primary filters (optional 2” MERV 13).
2.
(Option) The unit shall include pleated disposable 4” thick MERV 13 (optional 4” MERV 16) rated secondary filters after the
previously described 2” primary filters.
3.
Filter bank(s) shall be located immediately before the refrigeration system evaporator coil to filter fresh air (and return air if
applicable).
4.
(Option) The unit shall include a differential pressure switch wired to the main unit microprocessor controller to warn when the
filters may be dirty based on a preset maximum pressure drop.
Air Control Configuration
1.
Unit airflow control configuration shall be (one of the following):
a.
Fresh and return air dampers.
d.
Fresh air dampers with no return air opening for 100% outside air applications.
e.
Fresh air dampers with a return air exhaust opening and provisions for external interface to a Modine supplied Energy
Recovery Module, model ERM, consisting of pre-wired wiring drops from the unit for direct connection to the ERM.
2.
f.
Fresh air dampers with a return air exhaust opening and factory installed/wired Powered Exhaust Module.
g.
Return air opening only for 100% recirculation applications.
Units with dampers shall feature dampers that are constructed of extruded aluminum, hollow core, airfoil blades with rubber
edge seals and aluminum end seals. Damper blades shall be designed to have no more than 4 CFM of leakage per sq. ft. of
damper area when subjected to 1” w.g. air pressure differential across the damper.
3.
Fresh air damper actuator shall be spring return to close when not powered. If supplied with return air dampers, those shall be
spring return to close when not powered.
4.
Damper controls shall be as outlined in the “Controls” section.
Refrigeration System
1.
Unit shall be factory charged with R-410A refrigerant.
2.
Unit nominal cooling capacity shall be
3.
a.
15 tons
b.
20 tons
c.
26 tons
d.
30 tons
Compressors shall be Digital Scroll Compressor™ in tandem arrangement, capable of system capacity modulation from 10100%.
4.
Compressors shall be mounted in an isolated compartment to permit operation of the unit without affecting air flow when the
5.
Compressors shall be mounted on the compressor manufacturer’s recommended rubber vibration isolators to prevent
compartment door is open.
transmission of vibration to the building structure.
6.
Compressors shall include internal thermal overload protection.
7.
Compressors shall include crankcase heaters to protect against liquid flood-back and the elimination of oil foaming on startup.
8.
Refrigerant circuit shall be equipped with electronic expansion valve with evaporator coil pressure transducer, automatic reset
low pressure and manual reset high pressure refrigerant controls, Schrader type service fittings on both the high pressure and
low pressure sides, and refrigerant liquid line filter/drier.
MCP15-410.2
3
SPECIFICATIONS – Commercial Packaged Ventilation & Energy Recovery
9.
The air-cooled condenser section shall have vertical discharge axial flow direct drive fans with variable frequency drive for
condenser head pressure control, parallel flow PF™ micro-channel aluminum fin/tube condenser coils sloped approximately
30° to protect the coils from hail damage.
10. Evaporator coils shall be high capacity 4 row design with copper tubes and aluminum fins mechanically bonded to the tubes at
a spacing of 14 fins per inch. The coils shall feature vertical tube headers and galvanized steel end casings with stainless
steel lower bracket.
11. The unit shall include a double sloped, 316 stainless steel drain pan for positive drainage of condensate. The drain pan shall
include a condensate drain pan float switch to disable the compressors if the pan is not draining properly.
12. Standard refrigerant circuit safety controls and components shall include a 5-minute anti-short cycle delay timer, modulating
condenser fan speed control to allow operation down to 35°F, adjustable temperature compressor lockout (default for 45°F),
and liquid line sight glass. An airflow proving switch is monitored to ensure proper airflow before the refrigeration circuit is
energized.
13. (Option) The unit shall include a hot gas reheat coil, modulating valves, electronic controller, supply air temperature sensor,
and a dehumidification control that shall allow the unit to have a dehumidification mode of operation. The hot gas reheat coil
shall be located no less than 6” downstream of the evaporator coil to prevent condensate re-evaporation.
14. Refrigeration controls shall be as outlined in the “Controls” section.
Supply Air Mover
1.
The supply air fan shall be a 20” diameter (25” or 28” optional) backward inclined airfoil plenum fan to cover specified airflow
and total static pressure drop.
2.
The backward inclined airfoil plenum fan is to be self contained on a moveable/pivoting deck for service or removal from the
3.
The fan is to be belt driven by an adjustable V-belt drive with a minimum rating of 140% of the motor nameplate brake
cabinet.
horsepower when the adjustable pulley is at the minimum RPM.
4.
The V-belt drive is to include an auto belt tensioner.
5.
Blowers, drives, and motors shall be dynamically balanced.
6.
Blower shall feature permanently lubricated bearings.
7.
For variable air volume applications, variable frequency drive shall be factory mounted and wired to the supply fan motor.
8.
Motor shall be premium efficient to meet the Energy Independence and Security Act requirements and shall be inverter duty
9.
Motor shall have permanently lubricated ball bearings rated for 200,000 hours.
rated.
10. Motor shall be rated
a.
1 hp
b.
1-1/2 hp
c.
2 hp
d.
3 hp
e.
5 hp
f.
7-1/2 hp
g.
10 hp
h.
15 hp
11. Motor type shall be
a.
4
ODP – Open Drip Proof
MCP15-410.2
SPECIFICATIONS – Commercial Packaged Ventilation & Energy Recovery
b.
TE – Totally Enclosed
12. Supply air blower controls shall be as outlined in the “Controls” section.
Powered Exhaust/Energy Recovery Module
Powered Exhaust Module (Option)
1.
Unit shall include a factory installed and wired power exhaust module that is external to the packaged rooftop unit casing.
2.
The casing shall be designed for outdoor application with a fully weatherproof cabinet.
3.
Exterior casing parts shall be 18 gauge aluminized steel with an electrostatically applied polyester powdercoat paint finish.
Paint shall be applied post fabrication, but before assembly to ensure complete paint coverage on all surfaces of each part,
including the inside of punched holes. Pre-painted sheet metal or post assembly applied paint is not acceptable. Paint color
shall be standard Modine Commercial Gray Green.
4.
The casing shall be insulated with 1 inch, 1½ lb density acoustical and thermal insulation. The insulation shall be made of
glass fibers bonded with a thermosetting resin and overlaid with a fire-resistant black acrylic coating for additional strength.
The acrylic coating must meet the requirements of ASTM C 665 for fungi resistance.
5.
The module shall contain a twin blower assembly with double width, double inlet, forward curved centrifugal blower wheels that
are belt driven.
6.
Motor shall be premium efficient to meet the Energy Independence and Security Act requirements and shall be inverter duty
rated.
7.
Motor shall have permanently lubricated ball bearings rated for 200,000 hours.
8.
Motor shall be rated
9.
a.
1 hp
b.
1-1/2 hp
c.
2 hp
d.
3 hp
e.
5 hp
Motor type shall be
a.
ODP – Open Drip Proof
b.
TE – Totally Enclosed
10. Blowers, drives, and motors shall be dynamically balanced.
11. The module shall include exhaust air relief dampers that are sized for 100% relief of the power exhaust airflow capacity.
12. The power exhaust module blower controls shall be as outlined in the “Controls” section.
Energy Recovery Module (Option)
1.
Unit shall include a fully assembled energy recovery module, model ERM, that is field installed to the air inlet end of the
packaged rooftop unit.
2.
Exterior casing parts shall be 18 gauge aluminized steel with an electrostatically applied polyester powdercoat paint finish.
Paint shall be applied post fabrication, but before assembly to ensure complete paint coverage on all surfaces of each part,
including the inside of punched holes. Pre-painted sheet metal or post assembly applied paint is not acceptable. Paint color
shall be standard Modine Commercial Gray Green.
3.
Unit shall be internally insulated on all surfaces with exterior exposure, including walls, floor, and ceiling. Insulation shall be 2”
faced fiberglass, 1-1/2 lb. density and be completely encased within standard 20 gauge galvanized steel liners. These liners
MCP15-410.2
5
SPECIFICATIONS – Commercial Packaged Ventilation & Energy Recovery
shall provide double wall construction that complies with ASHRAE 62.1 to prevent mold growth, allow easy cleaning, and
protection of the insulation from the airstream and from entering the airstream.
4.
Roof shall have a standing roof seam for maximum roof rigidity and prevention of standing water and perimeter drip edges to
prevent water from dripping into the access doors.
5.
Access to filters, blower, heating section, and other items needing periodic inspection or maintenance shall be through hinged
access doors with quarter turn latches. Full length hinges are to be painted to match the unit color and the hinge pin is to be
stainless steel to prevent corrosion and rust staining. Doors are to have full perimeter gasketing.
6.
Unit shall be designed to reduce air leakage and infiltration through the cabinet. Continuous sealing shall be included between
panels and between access doors and openings to reduce air leakage. Refrigerant piping and electrical conduit through
cabinet panels shall include sealing to reduce air leakage.
7.
Unit shall include double nut lifting eye bolts on the top of the unit. The double nut will allow free rotation and secure lockdown of the eye bolts to accommodate varying spreader bar lifting orientations.
8.
The ERM inlet and return air connections shall be designed to match existing openings on the packaged rooftop unit for close
coupled installation without the need for additional field transition ductwork.
9.
The ERM shall include a field assembled and installed inlet rainhood and a factory mounted inlet birdscreen.
10. The ERM shall be pre-wired for direct connection to the package rooftop unit and shall be configured to match the supply
voltage to the packaged rooftop unit.
11. The ERM shall have a dedicated microprocessor controller that is networked to the packaged rooftop unit microprocessor
controller. Controls shall be as outlined in the “Controls” section.
12. The ERM shall feature rotary wheel type energy recovery that is mounted within a rigid, extruded aluminum frame that
containing the wheel drive motor, drive belt, wheel seals, and maintenance free bearings. The module shall be able to slide
out of the ERM for servicing.
13. All diameter and perimeter seals shall be provided as part of the assembly.
14. Drive belts of stretch urethane shall be provided for wheel rim drive without the need for external adjustment.
15. The energy recovery wheel shall be made of a corrosion resistant aluminum alloy that is composed of alternating corrugated
and flat, continuously wound layers of uniform widths that guarantees laminar air flow, and low static pressure loss.
16. The wheel shall be a Total Energy Recovery type wheel that allows transfer of both sensible and latent energy. The desiccant
shall be a very long life and high performance Zeolite coating that is permanently bonded to the aluminum wheel substrate.
Desiccant shall feature 4 angstrom (Å) pore diameter to allow high capacity and speed of adsorption and desorption without
forming odors.
17. The slide in energy recovery wheel assembly shall be an Underwriters Laboratories Recognized Component for electrical and
fire safety. Thermal performance shall be certified by the wheel manufacturer in accordance with ASHRAE Standard 84,
Method of Testing Air-to-Air Heat Exchangers and ARI Standard 1060, Rating Air-to-Air Energy Recovery Ventilation
Equipment. Assembly shall be listed in the ARI Certified Products.
18. Wheel energy recovery effectiveness shall be a minimum of 60% as defined in ASHRAE 189.1, Standard for the Design of
High-Performance Green Buildings except Low-Rise Residential Buildings.
19. Wheel shall be washable with detergent or alkaline coil cleaner and water. Desiccant shall not dissolve nor deliquesce in the
presence of water or high humidity.
20. The ERM shall include 2” MERV 10 (MERV 13 optional) disposable pleated filters upstream of the wheel on the inlet air side.
21. (Option) The ERM shall include 2” MERV 10 (MERV 13 optional) disposable pleated filters upstream of the wheel on the
exhaust air side.
22. (Option) The ERM shall include a differential pressure switch wired to the microprocessor controller to warn when the inlet air
filters may be dirty based on a preset maximum pressure drop.
6
MCP15-410.2
SPECIFICATIONS – Commercial Packaged Ventilation & Energy Recovery
23. (Option) The ERM shall include a differential pressure switch wired to the microprocessor controller to warn when the return
air filters may be dirty based on a preset maximum pressure drop.
24. The ERM shall include economizer wheel bypass to reduce fan energy usage when energy recovery is not required.
25. The ERM exhaust fan shall be a 20” diameter (28” optional) backward inclined airfoil plenum fan to cover specified airflow and
total static pressure drop.
26. The backward inclined airfoil plenum fan to be self contained on a moveable deck for service or removal from the cabinet.
27. The fan is to be belt driven by an adjustable V-belt drive with a minimum rating of 140% of the motor nameplate brake
horsepower when the adjustable pulley is at the minimum RPM.
28. The V-belt drive is to include an auto belt tensioner.
29. Blowers, drives, and motors shall be dynamically balanced.
30. Blower shall feature permanently lubricated bearings.
31. For variable air volume applications, variable frequency drive shall be factory mounted and wired to the exhaust fan motor.
32. Motor shall be premium efficient to meet the Energy Independence and Security Act requirements and shall be inverter duty
rated.
33. Motor shall have ball bearings rated for 200,000 hours.
34. Motor shall be rated
a.
1 hp
b.
1-1/2 hp
c.
2 hp
d.
3 hp
e.
5 hp
f.
7-1/2 hp
g.
10 hp
35. Motor type shall be
a.
ODP – Open Drip Proof
b.
TE – Totally Enclosed
36. The module shall include gravity exhaust air relief dampers that are sized for 100% relief of the power exhaust airflow
capacity.
37. (Option) The ERM shall include an electric pre-heat module to prevent frost formation on the wheel when the outside air
temperature falls below the frost threshold.
38. (Option) The ERM shall include a wheel rotation detection sensor wired for feedback to the microprocessor controller.
39. (Option) The ERM shall include a wheel pressure drop switch wired for feedback to the microprocessor controller.
40. The ERM module controls shall be as outlined in the “Controls” section.
Heating Configuration
No Heating (Standard)
1.
The unit shall be cooling only, no heating section included.
Gas Heating Section (Option)
1.
The unit shall have an indirect fired gas heating section rated
a.
300,000 Btu/hr consisting of two 150,000 Btu/hr modules in parallel.
b.
350,000 Btu/hr consisting of two 175,000 Btu/hr modules in parallel.
MCP15-410.2
7
SPECIFICATIONS – Commercial Packaged Ventilation & Energy Recovery
2.
c.
400,000 Btu/hr consisting of two 200,000 Btu/hr modules in parallel.
d.
450,000 Btu/hr consisting of two 225,000 Btu/hr modules in parallel.
e.
500,000 Btu/hr consisting of two 250,000 Btu/hr modules in parallel.
Gas connections to the furnaces shall consist of individually piped manifolds with separate gas valves and separate ignition
controllers. Individual furnace gas piping shall be joined internally to allow for single point connection of field supplied gas
piping. Gas supply piping can be brought in through the unit base for through the curb piping, or in the outside cabinet wall for
across the building roof piping.
3.
The gas heating section shall be configured for use with natural gas.
4.
The thermal efficiency of the section shall be a minimum of 80% for all air flow ranges (sizes 300, 400, and 500).
5.
The thermal efficiency of the unit(s) shall be a minimum of 93% efficient for all air flow ranges through the use of a secondary
recuperative heat exchanger. (sizes 350 and 450 only) The secondary heat exchanger shall be constructed of AL29-4C
stainless steel to withstand the corrosive environment of condensing gas fired equipment. An automatic reset high limit switch
is mounted on the power exhauster housing to shut off the gas supply in the event of overheating flue gas temperatures. A
condensate drain line overflow switch that senses if the condensate line is clogged and shuts the furnace down. The switch is
factory mounted inside the furnace control cabinet and wired to the unit controls.
6.
The heating section shall be capable of up to a 100°F maximum air temperature rise with a maximum discharge air
temperature of up to 130°F.
7.
Heat exchangers shall be tubular type with 18 gauge, 409 stainless steel tubes and headers.
8.
The heat exchangers shall be certified to withstand 3.0" W.C. external static pressure without burner flame disturbance.
9.
The burners shall be in-shot type, directly firing each heat exchanger tube individually and is designed for good lighting
characteristics without noise of extinction.
10. The units shall be a power exhausted and tested to insure proper ignition when the unit is subjected to 40 mile per hour wind
velocities. The unit shall also include a factory mounted differential pressure switch designed to prevent main burner ignition
until positive venting has been proven.
11. The ignition control shall be 100% shut-off with multi-retry.
12. The inlet gas pressure shall be between 6” and 7" W.C for natural gas.
13. The solid state ignition system shall directly light the gas by means of a direct spark igniter each time on a call for heat.
14. The heating section shall be provided with electronic modulating gas control valves, main combination gas valves/regulators,
and ignition controllers. An airflow proving switch is included to ensure proper airflow before the heating circuit is energized.
15. The gas controls can modulate the system gas flow between 30% through 100% of full fire.
16. The heating module will include automatic reset high limit switches.
17. The unit shall be orificed for operation
a.
up to 2000' elevation above sea level.
b.
(option) at ______’ elevation above sea level (up to 7500’).
18. The heating section controls shall be as outlined in the “Controls” section.
Gas Heating Section with Auxiliary Electric Heat Module (Option)
1.
The unit shall have an indirect fired gas heating section as specified above.
2.
The unit shall include an auxiliary 20kW electric heating section that is SCR controlled for precise discharge air temperature
control. The section would be enabled once heating demands fall below the modulation rate of the gas heating section.
3.
The auxiliary electric heat module shall be complete with fuses, a high temperature limit switch, and include full modulating
capacity control by a SCR (Silicon Controlled Rectifier). An airflow proving switch is included to ensure proper airflow before
the heating circuit is energized.
8
MCP15-410.2
SPECIFICATIONS – Commercial Packaged Ventilation & Energy Recovery
Electric Heat Section (Option)
1.
2.
The unit shall have an electric heating element section rated
a.
20kW (68,240 Btu/hr), derated for 208V.
b.
40kW (136,480 Btu/hr), derated for 208V.
c.
60kW (204,720 Btu/hr), derated for 208V.
d.
80kW (272,960 Btu/hr), derated for 208V.
e.
100kW (341,200 Btu/hr), derated for 208V.
The heating section shall be complete with fuses, a high temperature limit switch, and include staged control (option for full
modulating capacity control by a SCR (Silicon Controlled Rectifier)). An airflow proving switch is monitored to ensure proper
airflow before the heating circuit is energized.
3.
The heating section controls shall be as outlined in the “Controls” section.
Roof Curb
1.
The unit shall be supplied with a knocked down, field assembled and installed roof curb. The curb shall be constructed of 10
gauge galvanized steel and include wood nailing strips and assembly hardware. The roof curb shall be 14” high (24” optional).
2.
(Option) The roof curb shall be fully insulated with 1 inch, 1-1/2 lb density acoustical and thermal insulation. The insulation
shall be made of glass fibers bonded with a thermosetting resin and overlaid with a fire-resistant black acrylic coating for
additional strength. The acrylic coating must meet the requirements of ASTM C 665 for fungi resistance.
3.
Curb gasketing shall be furnished with the curb and is to be affixed to the curb immediately before mounting of the rooftop unit
to provide an air seal.
4.
(Option) The curb shall include a discharge air duct connector for field installation of ductwork to the curb prior to unit arrival.
5.
(Option) The curb shall include a return air duct connector for field installation of ductwork to the curb prior to unit arrival.
Controls
1.
All components located in the panel shall be clearly marked for easy identification. All terminal blocks and wires shall be
individually numbered. All electrical wires in the control panel shall be run in an enclosed raceway.
2.
All units shall include a Carel programmable microprocessor controller mounted in a controls compartment outside the
airstream. The controller will be preprogrammed to operate the unit in an energy efficient manner using pre-engineered
control strategies. The controller will monitor output from sensors within each unit subsystem and automatically adjust unit
operating parameters to maintain programmed setpoints and strategies.
3.
The controller shall contain LED’s and/or LCD interface to indicate the power status, communications status, and fault
conditions that arise during operation. Fault conditions indicated include but are not limited to supply air sensor failure,
outdoor air sensor failure, space sensor failure, mechanical cooling failure, mechanical heating failure, low supply temperature
alarm, high supply temperature alarm, and control temperature cooling or heating failure. The controller shall also monitor
outside temperature for heating and cooling circuit lockout during mild conditions. If temperatures fall below the low supply
temp alarm point, the unit shall be shut down.
4.
The Carel controller shall be capable of independent stand alone operation with field configuration, setpoint adjustment, and
scheduling accomplished at the unit with a integral user interface on the controller that includes a backlit LCD display, keypad,
and status LEDs to allow the programming of the control parameters (set point, differential band, alarm thresholds) and basic
functions by the user (ON/OFF and display of the controlled values).
MCP15-410.2
9
SPECIFICATIONS – Commercial Packaged Ventilation & Energy Recovery
5.
(Option) The unit shall be provided with a Carel space mounted digital module, model pAD, which includes a temperature and
humidity sensor and backlit LCD display to review unit setpoints and unit output and operating conditions. The pAD module
does not allow remote programming of the control parameters, but does allow temporary override of the unit. The device shall
be field wired to the main unit controller via the Carel pLAN network using shielded cable by others.
6.
(Option) The unit shall be provided with a Carel hand-held terminal device, model pGD1, that includes a backlit LCD display
and keypad to allow remote programming of the control parameters (set point, differential band, alarm thresholds) and basic
functions by the user (ON/OFF and display of the controlled values). The device shall be field wired to the main unit controller
via the Carel pLAN network using shielded cable by others.
7.
The controller shall have a full calendar schedule for occupied, unoccupied, and holiday scheduling.
8.
The controller shall retain all programmed values in non-volatile memory in the event of a power failure.
9.
(Option) The Carel controller shall have the ability to communicate and integrate with LonWorks® FTT-10 Free Topology
communication networks.
10. (Option) The Carel controller shall include a pCONet interface to provide the ability to communicate and integrate with
BACNet® MS/TP communication networks.
11. (Option) The Carel controller shall include a pCOWeb interface to provide the ability to communicate and integrate with
BACNet® Ethernet communication networks. The controller shall be IP addressable and be able to reside on a TCP/IP
network.
12. Each unit subsystem shall be controlled by the Carel microprocessor controller as follows:
Damper Controls (available only on units equipped with dampers)
1.
The dampers shall be independently controlled by separate direct mounted damper actuator motors. The damper actuators
shall work opposite of one another so that the mixed damper position always totals 100%. The exception is when the unit is in
the “OFF” mode of operation, at which point both dampers will be 100% closed to both the outside air and return air.
2.
The damper control shall be one of the following:
a.
2-position where the damper positions are either 100% closed or open to any customer specified position up to 100%
b.
3-position where the dampers are 100% closed, at a customer specified minimum position of outside air, or 100%
outside air.
outside air.
c.
4-position where the dampers are 100% closed, at one of two customer specified minimum positions of outside air, or
100% outside air.
d.
Fully modulating with building pressurization control to maintain a customer specified building pressure setpoint
relative to the outside atmosphere.
e.
Fully modulating with economizer control based on dual point enthalpy sensing comparing indoor against outdoor
enthalpy.
3.
(Option) Unit to be supplied with a shipped loose, field installed CO2 sensor to proportionately override the current outside
damper position to increase the ventilation rate when the level of CO2 rises over a predetermined set point. The sensor shall
have the capability of measuring CO2 levels from 0 to 2,000 ppm with an accuracy of + 40 ppm CO2 + 3.0% of the reading.
Supply Blower Controls
1.
The supply blower shall be single speed, on/off control with factory installed motor starter.
2.
The supply blower control shall be one of the following:
a.
2-speed variable frequency drive control to allow operation at a customer defined low speed or at full speed. Low
speed setting must be within the limits of the unit.
10
MCP15-410.2
SPECIFICATIONS – Commercial Packaged Ventilation & Energy Recovery
b.
3-speed variable frequency drive control to allow operation at one of two customer defined low speeds or at full
speed. Lowest speed setting must be within the limits of the unit.
c.
Modulating variable frequency drive control to maintain a customer specified building pressure setpoint relative to the
outside atmosphere. Lowest speed setting must be within the limits of the unit.
d.
Modulating variable frequency drive control with field installed CO2 sensor to proportionately increase fan speed to
increase the ventilation rate when the level of CO2 rises over a predetermined set point (demand controlled
ventilation). The sensor shall have the capability of measuring CO2 levels from 0 to 2,000 ppm with an accuracy of +
40 ppm CO2 + 3.0% of the reading.
Power Exhaust Blower Controls (for either Powered Exhaust or Energy Recovery Module)
1.
The power exhaust blower control shall be coordinated with the supply blower controls as follows:
a.
For single speed supply blower control, the exhaust blower control shall be single speed.
b.
For 2- or 3-speed VFD supply blower control, the exhaust blower control shall be 2- or 3-speed VFD control.
c.
For modulating supply blower control to maintain building pressure, the exhaust blower control shall be single speed
and configured to match the minimum ventilation rate of the supply air blower.
d.
For VFD demand controlled ventilation for the supply air blower, based on CO2 level, the exhaust blower control shall
be VFD control based on a frequency offset from the supply air blower. The power exhaust blower shall track the
supply air blower but lag slightly to maintain positive building pressurization as the supply air blower speed is
changed to adjust ventilation rate.
Refrigeration Controls
1.
The unit refrigeration controls shall be one of the following:
a.
Supply Air Temperature Control with Room Reset and Dehumidification Mode –The Modine Control System will
control the supply air temperature as follows:
Neutral Mode:
Modulate cooling and heating (if applicable) to maintain neutral dry bulb supply temp control (Typical: 70°F)
Cooling Reset Mode:
A space sensor is monitored and if the space temp rises above the space setpoint, the supply air temp setpoint
is reset to increase cooling (Typical: 55°F). Once the space sensor is satisfied, control reverts to Neutral
Control.
Heating Reset Mode (if supplied with heat option):
A space sensor is monitored and if the space temp falls below the space setpoint, the supply air temp setpoint is
reset to increase heating (Typical: 90°F). Once the space sensor is satisfied, control reverts to Neutral Control.
Dehumidification Mode:
A space sensor is monitored and if the space relative humidity exceeds the desired setpoint, the unit enters
dehum mode. In dehum mode, the digital scroll compressor is modulated to maintain the desired coil temp
based on suction line pressure (Typical: 45°F) to increase moisture removal.
The hot gas reheat option is highly recommended in dehum mode to avoid overcooling the space and would be
modulated to maintain the active supply air temp.
If the space temp exceeds the desired space dry bulb setpoint in dehum mode, hot gas reheat (if included) is
modulated to maintain the cooling reset temp (Typical: 55°F).
b.
Supply Air Temperature Control with Outside Temperature Reset –The Modine Control System will control the
supply air temperature as follows:
MCP15-410.2
11
SPECIFICATIONS – Commercial Packaged Ventilation & Energy Recovery
Neutral Mode:
Modulate cooling and heating (if applicable) to maintain neutral dry bulb supply temp control (Typical: 70°F)
Cooling Reset Mode:
An outside air sensor is monitored and if the temp rises above the outside air setpoint, the supply air temp
setpoint is reset to increase cooling (Typical: 55°F). Once the outside air sensor is satisfied, control reverts to
Neutral Control.
Heating Reset Mode (if supplied with heat option):
An outside air sensor is monitored and if the temp falls below the outside air setpoint, the supply air temp
setpoint is reset to increase heating (Typical: 90°F). Once the outside air sensor is satisfied, control reverts to
Neutral Control.
Dehumidification Mode:
An outside air sensor is monitored and if the outside air enthalpy exceeds the desired setpoint, the unit enters
dehum mode. In dehum mode, the digital scroll compressor is modulated to maintain the desired coil temp
based on suction line pressure (Typical: 45°F) to increase moisture removal.
The hot gas reheat option is highly recommended in dehum mode to avoid overcooling the space and would be
modulated to maintain the active supply air temp.
If the outside air temp exceeds the desired outside air dry bulb setpoint in dehum mode, hot gas reheat (if
included) is modulated to maintain the cooling reset temp (Typical: 55°F).
c.
Supply Air Temperature Control with Room and Outside Temperature Reset – The Modine Control System will
control the supply air temperature as follows:
Neutral Mode:
Modulate cooling and heating (if applicable) to maintain neutral dry bulb supply temp control (Typical: 70°F)
Cooling Reset Mode:
Both a space sensor and an outside air sensor are monitored and if the temp rises above the setpoint of either
sensor, the supply air temp setpoint is reset to increase cooling (Typical: 55°F). Once both sensors are
satisfied, control reverts to Neutral Control.
Heating Reset Mode (if supplied with heat option):
Both a space sensor and an outside air sensor are monitored and if the temp falls below the setpoint of either
sensor, the supply air temp setpoint is reset to increase heating (Typical: 90°F). Once both sensors are
satisfied, control reverts to Neutral Control.
Dehumidification Mode:
Both a space sensor and an outside air sensor are monitored and if the space relative humidity and/or outside air
enthalpy exceeds the desired setpoint, the unit enters dehum mode. In dehum mode, the digital scroll
compressor is modulated to maintain the desired coil temp based on suction line pressure (Typical: 45°F) to
increase moisture removal.
The hot gas reheat option is highly recommended in dehum mode to avoid overcooling the space and would be
modulated to maintain the active supply air temp.
If the space temp or outside air temp exceeds the desired dry bulb setpoint in dehum mode, hot gas reheat (if
included) is modulated to maintain the cooling reset temp (Typical: 55°F).
2.
(Option) When equipped with the hot gas reheat option, the Modine Control System controller shall monitor a factory
supplied, field installed supply air temperature sensor and control the modulating hot gas reheat valve to vary the flow of hot
condenser gas through the reheat coil to maintain the desired supply air temperature setpoint and prevent temperature swings
and overcooling of the space during dehumidification.
12
MCP15-410.2
SPECIFICATIONS – Commercial Packaged Ventilation & Energy Recovery
Energy Recovery Module Controls
1. The energy recovery module wheel operation is controlled to rotate when energy recovery is maximized without causing a rise
in latent loading to the mechanical cooling equipment.
2. The module shall include an economizer wheel bypass damper. To maximize energy recovery effectiveness, the energy
recovery module bypass damper is closed when the wheel is rotating and to minimize supply fan energy consumption, the
damper is open when the wheel is not rotating.
3. The module shall include energy recovery wheel defrost control to periodically stop the wheel rotation to allow the warm
exhaust air to defrost the wheel.
4. The module shall include energy recovery wheel start-stop-jog control to periodically rotate the wheel position the wheel during
economizer mode to avoid wheel contamination from the airstream.
5. (Option) When equipped with the optional 20kW electric preheat element, the control shall cycle the preheat element on or off
based on the outside air temperature and indoor air temperature and relative humidity to ensure the temperature to the wheel
exceeds the frost threshold setpoint.
6. (Option) When equipped with the optional wheel rotation sensor, the main unit controller shall monitor the sensor and initiate
an alarm signal if wheel rotation is not sensed when energized.
7. (Option) When equipped with the optional wheel pressure drop switch, the main unit controller shall monitor the switch and
initiate an alarm signal if the wheel pressure drop exceeds the switch setpoint of the switch. The wheel pressure drop can rise
if the wheel is excessively dirty or if the wheel has frosted.
Other Available Controls (Options)
1.
The unit shall be provided with a factory installed return air duct smoke detector wired to shut off the unit and close the
dampers if smoke is detected. Power to the main unit controller is maintained for alarm communication.
2.
The unit shall be provided with a field installed return air duct smoke detector wired to shut off the unit and close the dampers
if smoke is detected. Power to the main unit controller is maintained for alarm communication.
3.
The unit shall be provided with a field installed supply air duct smoke detector wired to shut off the unit and close the dampers
if smoke is detected. Power to the main unit controller is maintained for alarm communication.
4.
The unit shall be provided with auxiliary contacts on the motor starter for initiating an external exhaust fan starter circuit by
others.
5.
The unit shall be provided with auxiliary relay contacts for initiating an external exhaust fan starter circuit by others when the
supply blower fan motor variable frequency drive is initiated.
Warranty
1.
The Standard Unit Warranty shall include the following:

Gas Heat Option Heat Exchangers: Five years from date of first beneficial use by buyer or any other user, within five
years from date of resale by buyer in any unchanged condition, or within 66 months from date of shipment from seller,
whichever occurs first.

Compressors: Two years from date of first beneficial use by buyer or any other user, within two years from date of resale
by buyer in any unchanged condition, or within 30 months from date of shipment from seller, whichever occurs first.

Coil Heat Exchangers, Sheet Metal: One year from date of first beneficial use by buyer or any other user, within one year
from date of resale by buyer in any unchanged condition, or within 18 months from date of shipment from seller,
whichever occurs first.
MCP15-410.2
13
SPECIFICATIONS – Commercial Packaged Ventilation & Energy Recovery

All Other Parts: Two years from date of first beneficial use by buyer or any other user, within two years from date of
resale by buyer in any unchanged condition, or within 30 months from date of shipment from seller, whichever occurs first.
2.
The Optional Extended Unit Warranty shall include the following:

Gas Heat Option Heat Exchangers: Extend to a total of ten years from date of first beneficial use by buyer or any other
user, within ten years from date of resale by buyer in any unchanged condition, or within 126 months from date of
shipment from seller, whichever occurs first.

Compressors: Extend to a total of five years from date of first beneficial use by buyer or any other user, within five years
from date of resale by buyer in any unchanged condition, or within 66 months from date of shipment from seller,
whichever occurs first.
End
14
MCP15-410.2
SPECIFICATIONS – Commercial Packaged Ventilation & Energy Recovery
MCP15-410.2
15
SPECIFICATIONS – Commercial Packaged Ventilation & Energy Recovery
Commercial Products Group  Modine Manufacturing Company  1500 DeKoven Avenue  Racine, Wisconsin, USA 53403-2552
Phone: 1.800.828.4328 (HEAT)  www.modinehvac.com
© Modine Manufacturing Company 2012
MCP15-410.2