This manual contains the installation and operating instructions for
your packaged rooftop system. There are some precautions that
should be taken to derive maximum satisfaction from it. Improper
installation can result in unsatisfactory operation or dangerous
conditions.
Read this manual and any instructions packaged with separate
equipment required to make up the system prior to installation.
Give this manual to the owner and explain its provisions. The
owner should retain this manual for future reference.
Checking Product Received
Upon receiving the unit, inspect it for any damage from shipment.
Claims for damage, either shipping or concealed, should be filed
immediately with the shipping company.
IMPORTANT: Check the
unit model number, heating size, electrical characteristics, and
accessories to determine if they are correct.
Specifications
General
The unit is available in 150,000, 225,000 and 252,000 BTUH
heating input. Cooling capacity is 7.5, 8.5, 10 and 12 nominal
tons. Units are convertible from bottom supply and return to
side supply and return by relocation of supply and return air
cover panels. See cover installation detail.
The units are weatherized for mounting outside of the building.
The information on the rating plate is in compliance with the
FTC and DOE rating for single phase units. The following
information is for three phase units which are not covered
under the DOE certification program.
1 The energy consumption of the ignition system used with
this unit is 175 watts.
2 The efficiency rating of this unit is a product thermal
efficiency rating determined under continuous operating
conditions independent of any installed system.
Major Components
The unit includes a hermetically-sealed refrigerating system
consisting of a scroll compressor, condenser coil, evaporator coil
with capillary tube assembly, a circulation air blower, a condenser
fan, a heat exchanger assembly, gas burner and control assembly,
combustion air motor and fan, and all necessary internal
electrical wiring. The cooling system of these units is factoryevacuated, charged and performance tested. Refrigerant amount
and type are indicated on rating plate.
The manufacturer’s warranty does not cover any damage or
defect to the air conditioner caused by the attachment or use of
any components, accessories or devices (other than those
authorized by the manufacturer) into, onto or in conjunction with
the air conditioner. You should be aware that the use of
unauthorized components, accessories or devices may
adversely affect the operation of the air conditioner and may also
endanger life and property. The manufacturer disclaims any
responsibility for such loss or injury resulting from the use of
such unauthorized components, accessories or devices.
▲▲
DANGER
!
Units are not design certified to be installed inside the structure.
Doing so can cause inadequate unit performance as well as
property damage and carbon monoxide poisoning resulting in
personal injury or death.
▲▲
DANGER
!
Page 4
4IM 862
Safety Information
Use only with type of gas approved for this unit. Refer to the
unit rating plate.
▲▲
WARNING
!
Install this unit only in a location and position as specified in
the location requirements and considerations section of
these instructions. Provide adequate combustion and
ventilation air to the unit space as specified in the venting
section of these instructions.
▲▲
WARNING
!
Provide adequate combustion and ventilation air to the unit
space as specified in the combustion and ventilation air
section of these instructions.
▲▲
WARNING
!
Combustion products must be discharged outdoors.
Connect this unit to an approved vent system only, as
specified in Vent Pipe Installation section of these
instructions.
▲▲
WARNING
!
Never test for gas leaks with an open flame. It can cause an
explosion or fire resulting in property damage, personal
injury or death. Use a commercially available soap solution
made specifically for the detection of leaks to check all
connections, as specified in the Gas Supply and Piping
section of these instructions.
▲▲
DANGER
!
Always install unit to operate within the unit's intended
temperature-rise range with a duct system which has an
external static pressure within the allowable range, as
specified in ducting section of these instructions. See also
unit rating plate.
▲▲
WARNING
!
When a unit is installed so that supply ducts carry air
circulated by the unit to areas outside the space containing
the unit, the return air shall also be handled by duct(s)
sealed to the unit casing and terminating outside the space
containing the unit.
▲▲
WARNING
!
This unit may be used to heat the building or structure
during construction if the following installation requirements
are met. Installation must comply with all installation
instructions including:
• Proper vent installation;
• Furnace operating under thermostatic control;
• Return air duct sealed to the furnace;
• Air filters in place;
• Set furnace input rate and temperature rise per rating
plate marking;
• Means of providing outdoor air required for combustion;
• Return air temperature maintained between 55°F (13°C)
and 80°F (27°C); and
• Installation of exhaust and combustion air inlet hoods
completed;
• Clean furnace, duct work and components upon
substantial completion of the construction process, and
verify furnace operating conditions including ignition input
rate, temperature rise and venting, according to the
instructions.
▲▲
WARNING
!
Page 5
IM 862
5
Figure 1: Bottom View
Figure 2: Cabinet Dimensions and Access Locations
Unit Dimensions
IMPORTANT: THIS UNIT MUST BE MOUNTED LEVEL IN
BOTH DIRECTIONS TO ALLOW WATER TO DRAIN FROM
THE CONDENSER SECTION AND CONDENSATE PAN.
2”
[50.8 mm]
2”
[50.8 mm]
2”
[50.8 mm]
2”
[50.8 mm]
23”
[584.2 mm]
2”
[50.8 mm]
4.44”
[112.7 mm]
14”
[355.6 mm]
54.75”
[1390.6 mm]
10.44”
[265.1 mm]
89.69”
[2278 mm]
25”
[635 mm]
34”
[863.6 mm]
15.13”
[384.2 mm]
40.19”
[1020.7 mm]
3.81”
[96.8 mm]
93.69”
[2379.6 mm]
58.75”
[1492.2 mm]
5”
[127 mm]
6.81”
[173 mm]
4.13”
[104.8 mm]
6.63”
[168.3 mm]
11.69”
[296.9 mm]
CONTROL
ENTRY
.88” [22.2 mm]
DIA.
POWER
ENTRY
1.88” [44.5 mm]
DIA.
OPTIONAL
ECONOMIZER
OUTDOOR
AIR HOOD
LOCATION
OPTIONAL
EXHAUST
HOOD
LOCATION
COMPRESSOR
ACCESS
SUPPLY COVER
RETURN COVER
OPTIONAL
0 - 30% OA
HOOD LOCATION
Page 6
6IM 862
Figure 3: Supply and Return Dimensions for Downflow Applications
Figure 4: Supply and Return Dimensions for Horizontal Applications - Back View
No. Used/Diameter in. [mm]2/24 [609.6]2/24 [609.6]2/24 [609.6]2/24 [609.6]
Drive Type/No. SpeedsDirect/1Direct/1Direct/1Direct/1
CFM [L/s]8000 [3775]8000 [3775]8000 [3775]8000 [3775]
No. Motors/HP2 at 1/3 HP2 at 1/3 HP2 at 1/3 HP2 at 1/3 HP
Motor RPM1075107510751075
No. Used/Diameter in. [mm]1/15x15 [381x381]1/15x15 [381x381]1/15x15 [381x381]1/15x15 [381x381]
Drive Type/No. SpeedsBelt/VariableBelt/VariableBelt/VariableBelt/Variable
No. Motors1111
Motor HP2233
Motor RPM1725172517251725
Motor Frame Size56565656
1. Cooling Performance is rated at 95° F ambient, 80° F entering dry bulb, 67° F entering wet bulb. Gross capacity does
not include the effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Unitsare suitable
for operation to
20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipment
certification program, which isbased on ARI Standard 210/240 or 360.
2. EER and/or SEER are rated at ARI conditionsand in accordance with DOE test procedures.
3. Integrated Part Load Value is rated in accordance with ARI Standard 210/240 or 360. Units are rated at 80° F ambient,
80° F entering dry bulb, and 67° F entering wet bulbat ARI r
ated cfm.
4. Heating Performance limit settings and rating data were established and approved under laboratory test conditions
using American National Standard Institute standards. Ratings shown are for elevations up to 2000 feet. For elevations
above 2000 feet, ratings should be reduced at the rate of 4% for each 1000 feet
above sea level.
5. Outdoor Sound Rating shown is tested in accordance with ARI Standard 270.
Page 9
IM 862
9
[] Designates Metric Conversions
Model MPS-007AGDL15E007AGDL22E007AGDM15E007AGDM22E
Cooling Performance
No. Used/Diameter in. [mm]2/24 [609.6]2/24 [609.6]2/24 [609.6]2/24 [609.6]
Drive Type/No. SpeedsDirect/1Direct/1Direct/1Direct/1
CFM [L/s]8000 [3775]8000 [3775]8000 [3775]8000 [3775]
No. Motors/HP2 at 1/3 HP2 at 1/3 HP2 at 1/3 HP2 at 1/3 HP
Motor RPM1075107510751075
No. Used/Diameter in. [mm]1/15x15 [381x381]1/15x15 [381x381]1/15x15 [381x381]1/15x15 [381x381]
Drive Type/No. SpeedsBelt/VariableBelt/VariableBelt/VariableBelt/Variable
No. Motors1111
Motor HP2233
Motor RPM1725172517251725
Motor Frame Size56565656
1. Cooling Performance is rated at 95° F ambient, 80° F entering dry bulb, 67° F entering wet bulb. Gross capacity does
not include the effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Unitsare suitable
for operation to
20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipment
certification program, which isbased on ARI Standard 210/240 or 360.
2. EER and/or SEER are rated at ARI conditionsand in accordance with DOE test procedures.
3. Integrated Part Load Value is rated in accordance with ARI Standard 210/240 or 360. Units are rated at 80° F ambient,
80° F entering dry bulb, and 67° F entering wet bulbat ARI r
ated cfm.
4. Heating Performance limit settings and rating data were established and approved under laboratory test conditions
using American National Standard Institute standards. Ratings shown are for elevations up to 2000 feet. For elevations
above 2000 feet, ratings should be reduced at the rate of 4% for each 1000 feet
above sea level.
5. Outdoor Sound Rating shown is tested in accordance with ARI Standard 270.
Page 10
10IM 862
[] Designates Metric Conversions
Model MPS-007AGYL22E007AGYM22E008AGCL15E008AGCL22E
Cooling Performance
No. Used/Diameter in. [mm]2/24 [609.6]2/24 [609.6]2/24 [609.6]2/24 [609.6]
Drive Type/No. SpeedsDirect/1Direct/1Direct/1Direct/1
CFM [L/s]8000 [3775]8000 [3775]8000 [3775]8000 [3775]
No. Motors/HP2 at 1/3 HP2 at 1/3 HP2 at 1/3 HP2 at 1/3 HP
Motor RPM1075107510751075
No. Used/Diameter in. [mm]1/15x15 [381x381]1/15x15 [381x381]1/15x15 [381x381]1/15x15 [381x381]
Drive Type/No. SpeedsBelt/VariableBelt/VariableBelt/VariableBelt/Variable
No. Motors1111
Motor HP2222
Motor RPM1725172517251725
Motor Frame Size56565656
1. Cooling Performance is rated at 95° F ambient, 80° F entering dry bulb, 67° F entering wet bulb. Gross capacity does
not include the effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Unitsare suitable
for operation to
20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipment
certification program, which isbased on ARI Standard 210/240 or 360.
2. EER and/or SEER are rated at ARI conditionsand in accordance with DOE test procedures.
3. Integrated Part Load Value is rated in accordance with ARI Standard 210/240 or 360. Units are rated at 80° F ambient,
80° F entering dry bulb, and 67° F entering wet bulbat ARI r
ated cfm.
4. Heating Performance limit settings and rating data were established and approved under laboratory test conditions
using American National Standard Institute standards. Ratings shown are for elevations up to 2000 feet. For elevations
above 2000 feet, ratings should be reduced at the rate of 4% for each 1000 feet
above sea level.
5. Outdoor Sound Rating shown is tested in accordance with ARI Standard 270.
Page 11
IM 862
11
General Data
[] Designates Metric Conversions
Model MPS-008AGCM15E008AGCM22E008AGDL15E008AGDL22E
Cooling Performance
No. Used/Diameter in. [mm]2/24 [609.6]2/24 [609.6]2/24 [609.6]2/24 [609.6]
Drive Type/No. SpeedsDirect/1Direct/1Direct/1Direct/1
CFM [L/s]8000 [3775]8000 [3775]8000 [3775]8000 [3775]
No. Motors/HP2 at 1/3 HP2 at 1/3 HP2 at 1/3 HP2 at 1/3 HP
Motor RPM1075107510751075
No. Used/Diameter in. [mm]1/15x15 [381x381]1/15x15 [381x381]1/15x15 [381x381]1/15x15 [381x381]
Drive Type/No. SpeedsBelt/VariableBelt/VariableBelt/VariableBelt/Variable
No. Motors1111
Motor HP3322
Motor RPM1725172517251725
Motor Frame Size56565656
1. Cooling Performance is rated at 95° F ambient, 80° F entering dry bulb, 67° F entering wet bulb. Gross capacity does
not include the effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Unitsare suitable
for operation to
20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipment
certification program, which isbased on ARI Standard 210/240 or 360.
2. EER and/or SEER are rated at ARI conditionsand in accordance with DOE test procedures.
3. Integrated Part Load Value is rated in accordance with ARI Standard 210/240 or 360. Units are rated at 80° F ambient,
80° F entering dry bulb, and 67° F entering wet bulbat ARI r
ated cfm.
4. Heating Performance limit settings and rating data were established and approved under laboratory test conditions
using American National Standard Institute standards. Ratings shown are for elevations up to 2000 feet. For elevations
above 2000 feet, ratings should be reduced at the rate of 4% for each 1000 feet
above sea level.
5. Outdoor Sound Rating shown is tested in accordance with ARI Standard 270.
Page 12
12IM 862
General Data
[] Designates Metric Conversions
Model MPS-008AGDM15E008AGDM22E008AGYL22E008AGYM22E
Cooling Performance
No. Used/Diameter in. [mm]2/24 [609.6]2/24 [609.6]2/24 [609.6]2/24 [609.6]
Drive Type/No. SpeedsDirect/1Direct/1Direct/1Direct/1
CFM [L/s]8000 [3775]8000 [3775]8000 [3775]8000 [3775]
No. Motors/HP2 at 1/3 HP2 at 1/3 HP2 at 1/3 HP2 at 1/3 HP
Motor RPM1075107510751075
No. Used/Diameter in. [mm]1/15x15 [381x381]1/15x15 [381x381]1/15x15 [381x381]1/15x15 [381x381]
Drive Type/No. SpeedsBelt/VariableBelt/VariableBelt/VariableBelt/Variable
No. Motors1111
Motor HP3323
Motor RPM1725172517251725
Motor Frame Size56565656
1. Cooling Performance is rated at 95° F ambient, 80° F entering dry bulb, 67° F entering wet bulb. Gross capacity does
not include the effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Unitsare suitable
for operation to
20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipment
certification program, which isbased on ARI Standard 210/240 or 360.
2. EER and/or SEER are rated at ARI conditionsand in accordance with DOE test procedures.
3. Integrated Part Load Value is rated in accordance with ARI Standard 210/240 or 360. Units are rated at 80° F ambient,
80° F entering dry bulb, and 67° F entering wet bulbat ARI r
ated cfm.
4. Heating Performance limit settings and rating data were established and approved under laboratory test conditions
using American National Standard Institute standards. Ratings shown are for elevations up to 2000 feet. For elevations
above 2000 feet, ratings should be reduced at the rate of 4% for each 1000 feet
above sea level.
5. Outdoor Sound Rating shown is tested in accordance with ARI Standard 270.
Page 13
IM 862
13
General Data
[] Designates Metric Conversions
Model MPS-010AGCL15E010AGCL22E010AGCM15E010AGCM22E
Cooling Performance
No. Used/Diameter in. [mm]2/24 [609.6]2/24 [609.6]2/24 [609.6]2/24 [609.6]
Drive Type/No. SpeedsDirect/1Direct/1Direct/1Direct/1
CFM [L/s]8000 [3775]8000 [3775]8000 [3775]8000 [3775]
No. Motors/HP2 at 1/3 HP2 at 1/3 HP2 at 1/3 HP2 at 1/3 HP
Motor RPM1075107510751075
No. Used/Diameter in. [mm]1/15x15 [381x381]1/15x15 [381x381]1/15x15 [381x381]1/15x15 [381x381]
Drive Type/No. SpeedsBelt/VariableBelt/VariableBelt/VariableBelt/Variable
No. Motors1111
Motor HP2233
Motor RPM1725172517251725
Motor Frame Size56565656
1. Cooling Performance is rated at 95° F ambient, 80° F entering dry bulb, 67° F entering wet bulb. Gross capacity does
not include the effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Unitsare suitable
for operation to
20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipment
certification program, which isbased on ARI Standard 210/240 or 360.
2. EER and/or SEER are rated at ARI conditionsand in accordance with DOE test procedures.
3. Integrated Part Load Value is rated in accordance with ARI Standard 210/240 or 360. Units are rated at 80° F ambient,
80° F entering dry bulb, and 67° F entering wet bulbat ARI r
ated cfm.
4. Heating Performance limit settings and rating data were established and approved under laboratory test conditions
using American National Standard Institute standards. Ratings shown are for elevations up to 2000 feet. For elevations
above 2000 feet, ratings should be reduced at the rate of 4% for each 1000 feet
above sea level.
5. Outdoor Sound Rating shown is tested in accordance with ARI Standard 270.
Page 14
14IM 862
General Data
[] Designates Metric Conversions
Model MPS-010AGDL15E010AGDL22E010AGDM15E010AGDM22E
Cooling Performance
No. Used/Diameter in. [mm]2/24 [609.6]2/24 [609.6]2/24 [609.6]2/24 [609.6]
Drive Type/No. SpeedsDirect/1Direct/1Direct/1Direct/1
CFM [L/s]8000 [3775]8000 [3775]8000 [3775]8000 [3775]
No. Motors/HP2 at 1/3 HP2 at 1/3 HP2 at 1/3 HP2 at 1/3 HP
Motor RPM1075107510751075
No. Used/Diameter in. [mm]1/15x15 [381x381]1/15x15 [381x381]1/15x15 [381x381]1/15x15 [381x381]
Drive Type/No. SpeedsBelt/VariableBelt/VariableBelt/VariableBelt/Variable
No. Motors1111
Motor HP2233
Motor RPM1725172517251725
Motor Frame Size56565656
1. Cooling Performance is rated at 95° F ambient, 80° F entering dry bulb, 67° F entering wet bulb. Gross capacity does
not include the effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Unitsare suitable
for operation to
20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipment
certification program, which isbased on ARI Standard 210/240 or 360.
2. EER and/or SEER are rated at ARI conditionsand in accordance with DOE test procedures.
3. Integrated Part Load Value is rated in accordance with ARI Standard 210/240 or 360. Units are rated at 80° F ambient,
80° F entering dry bulb, and 67° F entering wet bulbat ARI r
ated cfm.
4. Heating Performance limit settings and rating data were established and approved under laboratory test conditions
using American National Standard Institute standards. Ratings shown are for elevations up to 2000 feet. For elevations
above 2000 feet, ratings should be reduced at the rate of 4% for each 1000 feet
above sea level.
5. Outdoor Sound Rating shown is tested in accordance with ARI Standard 270.
Page 15
IM 862
15
General Data
[] Designates Metric Conversions
Model MPS-010AGYL22E012AGCL15E012AGCL25E
Cooling Performance
Net Weight lbs. [kg]1161 [527]1142 [518]1142 [518]
Steady State Efficiency (%)818181
Integrated Part Load Value
3
10.61010
No. Burners969
No. Stages222
Gas Connection Pipe Size in. [mm]0.75 [19.05]0.5 [12.7]0.75 [19.05]
Compressor
Qty./Type2/Scroll2/Scroll2/Scroll
Outdoor Sound Rating (dB)
5
888888
Outdoor Coil—Fin TypeLouveredLouveredLouvered
Tube TypeRifledRifledRifled
Tube Size in. [mm] OD0.375 [9.5]0.375 [9.5]0.375 [9.5]
Face Area sq. ft. [sq. m]27 [2.51]27 [2.51]27 [2.51]
Rows / FPI [FPcm]2 / 18 [7]2 / 22 [9]2 / 22 [9]
Net Latent Capacity Btu [kW]32000 [9.4]42000 [12.3]42000 [12.3]
Indoor Coil—Fin TypeLouveredLouveredLouvered
Tube TypeRifledRifledRifled
Tube Size in. [mm]0.375 [9.5]0.375 [9.5]0.375 [9.5]
Face Area sq. ft. [sq. m]13.5 [1.25]13.5 [1.25]13.5 [1.25]
Rows / FPI [FPcm]3 / 18 [7]4 / 15 [6]4 / 15 [6]
Refrigerant ControlCapillary TubesOrificesOrifices
Drain Connection No./Size in. [mm]1/1 [25.4]1/1 [25.4]1/1 [25.4]
Outdoor Fan—TypePropellerPropellerPropeller
No. Used/Diameter in. [mm]2/24 [609.6]2/24 [609.6]2/24 [609.6]
Drive Type/No. SpeedsDirect/1Direct/1Direct/1
CFM [L/s]8000 [3775]8000 [3775]8000 [3775]
No. Motors/HP2 at 1/3 HP2 at 1/3 HP2 at 1/3 HP
Motor RPM107510751075
No. Used/Diameter in. [mm]1/15x15 [381x381]1/15x15 [381x381]1/15x15 [381x381]
Drive Type/No. SpeedsBelt/VariableBelt/VariableBelt/Variable
No. Motors111
Motor HP233
Motor RPM172517251725
Motor Frame Size565656
Filter—TypeDisposableDisposableDisposable
FurnishedYesYe sYe s
(No.) Size Recommended in. [mm](6)2x18x18 [51x457x457](6)2x18x18 [51x457x457](6)2x18x18 [51x457x457]
1. Cooling Performance is rated at 95° F ambient, 80° F entering dry bulb, 67° F entering wet bulb. Gross capacity does
not include the effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Unitsare suitable
for operation to
20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipment
certification program, which isbased on ARI Standard 210/240 or 360.
2. EER and/or SEER are rated at ARI conditionsand in accordance with DOE test procedures.
3. Integrated Part Load Value is rated in accordance with ARI Standard 210/240 or 360. Units are rated at 80° F ambient,
80° F entering dry bulb, and 67° F entering wet bulbat ARI r
ated cfm.
4. Heating Performance limit settings and rating data were established and approved under laboratory test conditions
using American National Standard Institute standards. Ratings shown are for elevations up to 2000 feet. For elevations
above 2000 feet, ratings should be reduced at the rate of 4% for each 1000 feet
above sea level.
5. Outdoor Sound Rating shown is tested in accordance with ARI Standard 270.
Page 16
16IM 862
General Data
[] Designates Metric Conversions
Model MPS-012AGCM15E012AGDL15E012AGDL25E
Cooling Performance
Net Weight lbs. [kg]1168 [530]1142 [518]1142 [518]
Steady State Efficiency (%)818181
Integrated Part Load Value
3
101010
No. Burners669
No. Stages222
Gas Connection Pipe Size in. [mm]0.5 [12.7]0.5 [12.7]0.75 [19.05]
Compressor
Qty./Type2/Scroll2/Scroll2/Scroll
Outdoor Sound Rating (dB)
5
888888
Outdoor Coil—Fin TypeLouveredLouveredLouvered
Tube TypeRifledRifledRifled
Tube Size in. [mm] OD0.375 [9.5]0.375 [9.5]0.375 [9.5]
Face Area sq. ft. [sq. m]27 [2.51]27 [2.51]27 [2.51]
Rows / FPI [FPcm]2 / 22 [9]2 / 22 [9]2 / 22 [9]
Net Latent Capacity Btu [kW]42000 [12.3]42000 [12.3]42000 [12.3]
Indoor Coil—Fin TypeLouveredLouveredLouvered
Tube TypeRifledRifledRifled
Tube Size in. [mm]0.375 [9.5]0.375 [9.5]0.375 [9.5]
Face Area sq. ft. [sq. m]13.5 [1.25]13.5 [1.25]13.5 [1.25]
Rows / FPI [FPcm]4 / 15 [6]4 / 15 [6]4 / 15 [6]
Refrigerant ControlOrificesOrificesOrifices
Drain Connection No./Size in. [mm]1/1 [25.4]1/1 [25.4]1/1 [25.4]
Outdoor Fan—TypePropellerPropellerPropeller
No. Used/Diameter in. [mm]2/24 [609.6]2/24 [609.6]2/24 [609.6]
Drive Type/No. SpeedsDirect/1Direct/1Direct/1
CFM [L/s]8000 [3775]8000 [3775]8000 [3775]
No. Motors/HP2 at 1/3 HP2 at 1/3 HP2 at 1/3 HP
Motor RPM107510751075
No. Used/Diameter in. [mm]1/15x15 [381x381]1/15x15 [381x381]1/15x15 [381x381]
Drive Type/No. SpeedsBelt/VariableBelt/VariableBelt/Variable
No. Motors111
Motor HP533
Motor RPM172517251725
Motor Frame Size1845656
Filter—TypeDisposableDisposableDisposable
FurnishedYesYe sYe s
(No.) Size Recommended in. [mm](6)2x18x18 [51x457x457](6)2x18x18 [51x457x457](6)2x18x18 [51x457x457]
1. Cooling Performance is rated at 95° F ambient, 80° F entering dry bulb, 67° F entering wet bulb. Gross capacity does
not include the effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Unitsare suitable
for operation to
20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipment
certification program, which isbased on ARI Standard 210/240 or 360.
2. EER and/or SEER are rated at ARI conditionsand in accordance with DOE test procedures.
3. Integrated Part Load Value is rated in accordance with ARI Standard 210/240 or 360. Units are rated at 80° F ambient,
80° F entering dry bulb, and 67° F entering wet bulbat ARI r
ated cfm.
4. Heating Performance limit settings and rating data were established and approved under laboratory test conditions
using American National Standard Institute standards. Ratings shown are for elevations up to 2000 feet. For elevations
above 2000 feet, ratings should be reduced at the rate of 4% for each 1000 feet
above sea level.
5. Outdoor Sound Rating shown is tested in accordance with ARI Standard 270.
Page 17
IM 862
17
General Data
[] Designates Metric Conversions
Model MPS-012AGDM15E012AGYL25E
Cooling Performance
No. Burners69
No. Stages22
Gas Connection Pipe Size in. [mm]0.5 [12.7]0.75 [19.05]
Compressor
Qty./Type2/Scroll2/Scroll
Outdoor Sound Rating (dB)
5
8888
Outdoor Coil—Fin TypeLouveredLouvered
Tube TypeRifledRifled
Tube Size in. [mm] OD0.375 [9.5]0.375 [9.5]
Face Area sq. ft. [sq. m]27 [2.51]27 [2.51]
Rows / FPI [FPcm]2 / 22 [9]2 / 22 [9]
Net Latent Capacity Btu [kW]42000 [12.3]42000 [12.3]
Indoor Coil—Fin TypeLouveredLouvered
Tube TypeRifledRifled
Tube Size in. [mm]0.375 [9.5]0.375 [9.5]
Face Area sq. ft. [sq. m]13.5 [1.25]13.5 [1.25]
Rows / FPI [FPcm]4 / 15 [6]4 / 15 [6]
Refrigerant ControlOrificesOrifices
Drain Connection No./Size in. [mm]1/1 [25.4]1/1 [25.4]
Outdoor Fan—TypePropellerPropeller
No. Used/Diameter in. [mm]2/24 [609.6]2/24 [609.6]
Drive Type/No. SpeedsDirect/1Direct/1
CFM [L/s]8000 [3775]8000 [3775]
No. Motors/HP2 at 1/3 HP2 at 1/3 HP
Motor RPM10751075
Indoor Fan—TypeFC CentrifugalFC Centrifugal
No. Used/Diameter in. [mm]1/15x15 [381x381]1/15x15 [381x381]
Drive Type/No. SpeedsBelt/VariableBelt/Variable
No. Motors11
Motor HP53
Motor RPM17251725
Motor Frame Size18456
Filter—TypeDisposableDisposable
FurnishedYesYe s
(No.) Size Recommended in. [mm](6)2x18x18 [51x457x457](6)2x18x18 [51x457x457]
Refrigerant Charge Oz. (Sys. 1/Sys. 2) [g]192/192 [5443/5443]192/192 [5443/5443]
Weights
1. Cooling Performance is rated at 95° F ambient, 80° F entering dry bulb, 67° F entering wet bulb. Gross capacity does
not include the effect of fan motor heat. ARI capacity is net and includes the effect of fan motor heat. Unitsare suitable
for operation to
20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipment
certification program, which isbased on ARI Standard 210/240 or 360.
2. EER and/or SEER are rated at ARI conditionsand in accordance with DOE test procedures.
3. Integrated Part Load Value is rated in accordance with ARI Standard 210/240 or 360. Units are rated at 80° F ambient,
80° F entering dry bulb, and 67° F entering wet bulbat ARI r
ated cfm.
4. Heating Performance limit settings and rating data were established and approved under laboratory test conditions
using American National Standard Institute standards. Ratings shown are for elevations up to 2000 feet. For elevations
above 2000 feet, ratings should be reduced at the rate of 4% for each 1000 feet
above sea level.
5. Outdoor Sound Rating shown is tested in accordance with ARI Standard 270.
2. Amp Draw Per Motor. Multiply Value By Number of Motors to Determine Total Amps.
Page 21
IM 862
21
Installation
General
1 INSTALLATION — Install this unit in accordance with
The American National Standard Z223.1-latest edition
manual entitled “National Fuel Gas Code,” and the
requirements or codes of the local utility or other
authority having jurisdiction.
Additional helpful publications available from the
“National Fire Protection Association” are: NFPA-90A Installation of Air Conditioning and Ventilating Systems
1985 or latest edition. NFPA-90B - Warm Air Heating
and Air Conditioning Systems 1984.
These publications are available from:
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
2 PRE-INSTALLATION CHECK-POINTS — Before
attempting any installation, carefully consider the
following points:
Structural strength of supporting members (Rooftop
Installation)
Clearances and provision for servicing
Power supply and wiring
Gas supply and piping
Air duct connections and sizing
Drain facilities and connections
Location for minimum noise and vibration - away from
bedroom windows
Location Considerations
The metal parts of this unit may be subject to rust or
deterioration in adverse environmental conditions. This
oxidation could shorten the equipment’s useful life. Salt spray,
fog or mist in seacoast areas, sulphur or chlorine from lawn
watering systems, and various chemical contaminants from
industries such as paper mills and petroleum refineries are
especially corrosive.
If the unit is to be installed in an area where contaminants
are likely to be a problem, give special attention to the
equipment location and exposure.
1 Avoid having lawn sprinkler heads spray directly on the
unit cabinet.
2 In coastal areas locate the unit on the side of the building
away from the waterfront.
3 Shielding by a fence or shrubs may give some protection.
1 Frequent washing of the cabinet, fan blade and coil with
fresh water will remove most of the salt or other
contaminants that build up on the unit.
2 Regular cleaning and waxing of the cabinet with an
automobile polish will provide some protection.
3 A liquid cleaner may be used several times a year to
remove matter that will not wash off with water.
Several different types of protective coatings are offered in
some areas. These coatings may provide some benefit, but the
effectiveness of such coating materials cannot be verified by
the equipment manufacturer.
The best protection is frequent cleaning, maintenance and
minimal exposure to contaminants.
Outside Installation
(Typical outdoor slab installation is shown in Figure 7.)
1 Select a location where external water drainage cannot
collect around unit.
2 Provide a level slab sufficiently high enough above grade
to prevent surface water from entering the unit
3 Locate the unit to provide proper access for inspection
and servicing as shown in Figure 9.
4 Locate unit where operating sounds will not disturb
Power supply to unit must be disconnected before making
field connections. To avoid electrical shock, personal injury
or death, be sure to rigorously adhere to field wiring
procedures regarding proper lockout and tagout of
components.
▲▲
DANGER
!
These units are designed certified for outdoor installation
only. Installation inside any part of a structure can result in
inadequate unit performance as well as property damage.
Installation inside can also cause recirculation of flue
products into the conditioned space resulting in personal
injury or death.
▲▲
DANGER
!
Page 22
22IM 862
5 Locate unit so roof runoff water does not pour directly on
the unit. Provide gutter or other shielding at roof level.
Do not locate unit in an area where excessive snow
drifting may occur or accumulate.
6 Where snowfall is anticipated, the height of the unit
above the ground level must be considered. Mount unit
high enough to be above anticipated maximum area
snowfall and to allow combustion air to enter the
combustion air inlet.
7 Select an area which will keep the areas of the vent, air
intake, and A/C condenser fins free and clear of
obstructions such as weeds, shrubs, vines, snow, etc.
Inform the user accordingly.
Attaching Exhaust and Combustion Air Inlet
Hoods
IMPORTANT: Do not operate this unit without the
exhaust/combustion air inlet hood properly installed. This hood is
shipped in a carton in the blower compartment inside the unit and
must be attached when the unit is installed. See Figure 5.
To attach exhaust/combustion air inlet hood:
1 Remove screws securing blower access panel and remove
access panel. For location of blower access panel, see Figure
5.
2 Remove exhaust/combustion air inlet hood from the carton,
located inside the blower compartment.
3 Attach blower access panel.
4 Attach the combustion air inlet/exhaust hood with screws.
Reference Figure 5 for proper location. Screws are in carton
with the hood.
5 Vent the unit using the flue exhaust hood, as supplied from
the factory, without alteration or addition. The only
exception is with factory approved additions. Consult your
local utility or other authority having jurisdiction for
accepted venting techniques.
Cover Panel Installation/Conversion
Procedure
Downflow To Horizontal
1 Remove the screws and covers from the outside of the
supply and return sections. See Figure 2.
2 Install the covers over the bottom supply and return
openings, painted side up, inserting the leading flange
under the bracket provided. Place the back flange to top
of the front bracket provided. See Figure 8.
3 Secure the return and supply cover to front bracket with
one (1) screw.
Filter Replacement
This unit is provided with 6 - 18” X 18” X 2” disposable
filters. When replacing filters, ensure they are inserted fully to
the back to prevent bypass.
Clearances
The following minimum clearances must be observed for proper
unit performance and serviceability. Reference Figure 9.
Figure 8: Cover Gasket Detail for units shipped for
downflow application being converted to horizontal
A074001
Recommended
Clearance
Location
48”A - Front
18”B - Condenser Coil
18”C - Duct Side
18”*D - Evaporator End
60”E - Above
*Without Economizer. 48” With Economizer
Figure 9: Clearances
I-741
Page 23
IM 862
23
Rooftop Installation
1 Before locating the unit on the roof, make sure that the
roof structure is adequate to support the weight involved.
(See Electrical & Physical Tables in this manual.) THIS
IS VERY IMPORTANT AND THE INSTALLER’S
RESPONSIBILITY.
2 For rigging and roofcurb details, see Figures 11, 12, 13
and 14.
3 The location of the unit on the roof should be such as to
provide proper access for inspection and servicing.
IMPORTANT: If unit will not be put into service immediately,
block off supply and return air openings to prevent excessive
condensation.
Ducting
The installing contractor should fabricate ductwork in
accordance with local codes. Use industry manuals as a guide
when sizing and designing the duct system. Contact Air
Conditioning Contractors of America, 1513 16th St. N.W.,
Washington, D.C. 20036.
Place the unit as close to the conditioned space as possible
allowing clearances as indicated. Run ducts as directly as
possible to supply and return outlets. Use of non-flammable
weatherproof flexible connectors on both supply and return
connections at unit to reduce noise transmission is
recommended.
On ductwork exposed to outside temperature and humidity,
use a minimum of 2” of insulation and a vapor barrier.
Distribution system in attic, furred space or crawl space
should be insulated with at least 2” of insulation. Half-inch to
1” thick insulation is usually sufficient for ductwork inside the
air conditioned space.
Provide balancing dampers for each branch duct in the supply
system. Properly support ductwork from the structure.
IMPORTANT: In the event that the return air ducts must be run
through an “unconfined” space containing other fuel burning
equipment, it is imperative that the user be informed against
future changes in construction which might change this to a
“confined space.” Also, caution the user against any future
installation of additional equipment (such as power ventilators),
within the existing unconfined and/or confined space which might
create a negative pressure within the vicinity of other solid, liquid,
or gas fueled units.
Return Air
Figure 10A: Flat rooftop installation, attic or drop ceiling
distributing system. Mounted on roofcurb. Curb must be
level.
I-742-01
Figure 10B: Flat rooftop installation, attic or drop ceiling
distributing system. Mounted on roofcurb. Curb must be
level.
I-742-02
Do not, under any circumstances, connect return ductwork
to any other heat producing device such as fireplace insert,
stove, etc. Unauthorized use of such devices may result in
fire, carbon monoxide poisoning, explosion, personal injury,
property damage or death.
▲▲
DANGER
!
Never allow products of combustion or the flue products to
enter the return air ductwork, or the circulating air supply. All
return ductwork must be adequately sealed and secured to
the furnace with sheet metal screws, and joints taped. All
other duct joints must be secured with approved
connections and sealed airtight.
Failure to prevent products of combustion from being
circulated into the living space can create potentially
hazardous conditions, including carbon monoxide poisoning
that could result in personal injury or death.
▲▲
DANGER
!
Page 24
24IM 862
A074302
Figure 14: Roofcurb
ST-A1084-1
Figure 12: Shipping Board Removal
[ ] Designates Metric Conversions
Illustration
ST-A0744-03
A07
4
403
Figure 11: Lifting Detail
A074302
Figure 13: Roofcurb
ABCD
33%
27%17%23%
Capacity Tons [kW]
7.5-12.5 [26.4-44.0]
Corner Weights by Percentage
REMOVE SHIPPING BOARDS
BEFORE INSTALLING UNIT.
Page 25
IM 862
25
Gas Supply, Condensate Drain
and Piping
Gas Connection
IMPORTANT: Connect this unit only to gas supplied by a
commercial utility.
1 Install gas piping in accordance with local codes and
regulations of the local utility company. In the absence of
local codes, the installation must conform to the
specifications of the National Fuel Gas Code, ANSI
Z223.1 - latest edition.
NOTE: The use of flexible gas connectors is not permitted.
2 Connect the gas line to the gas valve supplied with unit.
Routing can be through the gas pipe opening shown in
Figures 7 or 10 or through the base as shown in Figure
18.
3 Size the gas line to the furnace adequate enough to
prevent undue pressure drop and never less than 1/2”.
4 Install a drip leg or sediment trap in the gas supply line as
close to the unit as possible.
5 Install an outside ground joint union to connect the gas
supply to the control assembly at the burner tray.
6 Gas valves have been factory installed. Install a manual
gas valve where local codes specify a shut-off valve
outside the unit casing. (See Figure 15.)
7 Make sure piping is tight. A pipe compound resistant to
the action of liquefied petroleum gases must be used at
all threaded pipe connections.
8 IMPORTANT: Any additions, changes or conversions
required for the furnace to satisfactorily meet the application
should be made by a qualified installer, service agency or
the gas supplier, using factory-specified or approved parts.
In the commonwealth of Massachusetts, installation must
be performed by a licensed plumber or gas fitter for
appropriate fuel.
IMPORTANT: Disconnect the furnace and its individual shutoff
valve from the gas supply piping during any pressure testing of
that system at test pressures in excess of 1/2 pound per square
inch gauge or isolate the system from the gas supply piping
system by closing its individual manual shutoff valve during any
pressure testing of this gas supply system at pressures equal to
or less than 1/2 PSIG.
IMPORTANT: Check the rating plate to make certain the unit is
equipped to burn the type of gas supplied. Care should be taken
after installation of this equipment that the gas control valve not
be subjected to high gas supply line pressure.
In making gas connections, avoid strains as they may cause
noise and damage the controls. A backup wrench is required to
be used on the valve to avoid damage.
The capacities of gas pipe of different diameters and lengths in
cu. ft. per hr. with pressure drop of 0.3 in. and specific gravity
of 0.60 (natural gas) are shown in Table 1.
After determining the pipe length, select the pipe size which
will provide the minimum cubic feet per hour required for the
gas input rating of the furnace. By formula:
Gas Input of Furnace
(BTU/HR)
Cu. Ft. Per Hr. Required=
Heating Value of Gas
(BTU/FT3)
The gas input of the furnace is marked on the furnace rating
plate. The heating value of the gas (BTU/FT3) may be
determined by consulting the local natural gas utility or the
L.P. gas supplier.
LP Conversion
Convert the unit to use liquefied petroleum (LP) gas by
replacing with the gas valve supplied in the conversion kit.
The LP gas valve maintains the proper manifold pressure for
LP gas. The correct burner LP orifices are included in the kit.
IMPORTANT: To remove the natural gas valve, remove the four
screws securing the manifold pipe to the burner tray. Remove
the manifold pipe with gas valve attached.
Figure 15: Suggested Gas Piping
FROM GAS
METER
*
Factory supplied grommet must be utilized.
MANUAL GASSHUT-OFF
VALV E
UNIT GAS SUPPLY
CONNECTION
*
ROOF OR GROUND LEVEL INSTALLATION
Never test for gas leaks with an open flame. It can cause an
explosion or fire resulting in property damage, personal
injury or death. Use a commercially available soap solution
made specifically for the detection of leaks to check all
connections as specified in the Gas Supply and Piping
section of these instructions.
▲▲
DANGER
!
This unit is equipped at the factory for use on natural gas
only. Conversion to LP gas requires a special kit supplied by
the distributor or manufacturer. Mailing addresses are listed
on the furnace rating plate, parts list and warranty. Failure to
use the proper conversion kit can cause fire, carbon
monoxide poisoning, explosion, personal injury, property
damage or death.
NOTE: Order the correct LP conversion kit from the furnace
manufacturer. See Conversion Kit Index shipped with unit for
proper LP kit number. Furnace conversion to LP gas must be
performed by a qualified technician.
Adjusting or Checking Furnace Input
– Natural Gas Line Pressure 5” - 10.5” W.C.
– LP Gas Line Pressure 11” - 13” W.C.
– Natural Gas Manifold Pressure 3.5” W.C
– LP Gas Manifold Pressure - 10” W.C.
Supply and manifold pressure taps are located on the gas valve
body 1/8” N.P.T. and on the manifold.
Use a properly calibrated manometer gauge for accurate gas
pressure readings.
Only small variations in the gas flow should be made by
means of the pressure regulator adjustment. Furnaces
functioning on LP gas must be set by means of the tank or
branch supply regulators. The furnace manifold pressure
should be set at 10” W.C. at the gas control valve.
To adjust the pressure regulator, remove the regulator cap and
turn the adjustment screw clockwise to increase pressure or
counterclockwise to decrease pressure. Then replace the
regulator cap securely.
Any necessary major changes in the gas flow rate should be
made by changing the size of the burner orifices. To change
orifice spuds, shut off the manual main gas valve and remove
the gas manifold.
For elevations up to 2,000 feet, rating plate input ratings
apply. For high altitudes (elevations over 2,000 ft.), see
conversion kit index 92-21519-XX for derating and orifice
spud sizes.
Check of input is important to prevent over-firing of the
furnace beyond its design-rated input. NEVER SET
INPUT ABOVE THAT SHOWN ON THE RATING
PLATE. Use the following table or formula to determine
input rate.
Heating Value of Gas
(BTU/Cu. Ft.) x 3600
Cu. Ft. Per Hr. Required =
Time in Seconds
(for 1 Cu. Ft.) of Gas
Start the furnace and measure the time required to burn one
cubic foot of gas. Prior to checking the furnace input, make
certain that all other gas units are shut off, with the exception
of pilot burners. Time the meter with only the furnace in
operation.
IMPORTANT NOTE FOR ALTITUDES ABOVE 2,000 FEET (610
METERS): The main burner orifices in your furnace and in these
kits are sized for the nameplate input and intended for
installations at elevations up to 2,000 feet in the USA or Canada,
or for elevations of 2,000 - 4,500 feet (610 -1,373 meters) in
Canada if the unit has been derated at the factory. For elevations
above 2,000 feet (610 meters) IN THE USA ONLY (see ANSI-
Z223.1), the burner orifices must be sized to reduce the input 4%
for each 1,000 feet (305 meters) above sea level.
NOTICE: Derating of the heating input for high altitude in the
field is unlawful in Canada (refer to CAN/CGA 2.17). Units
installed in altitudes greater than 2,000 feet (610 meters) must
be shipped from the factory or from a factory authorized
conversion station with the heating input derated by 10% so as
to operate properly in altitudes from 2,000 - 4,500 feet (610 1,373 meters).
Condensate Drain
The condensate drain connection of the evaporator is threaded
1” nominal iron pipe. IMPORTANT: Install a condensate trap to
ensure proper condensate drainage. See Figure 16.
Maximum capacity of pipe in thousands of BTU per hour of undiluted liquefied petroleum
gases (at 11 inches water column inlet pressure).
(Based on a Pressure Drop of 0.5 Inch Water Column)
Example (LP): Input BTU requirement of unit, 150,000
Equivalent length of pipe, 60 ft. = 3/4” IPS required.
ONE1 211 301341393 45
40,000
TEN133015 015 3616 30 37 30
ONE 0541 01 316230
60,000
TEN 901001024110250
ONE 041045047050153
80,000
TEN6 457 30748815 18 45
ONE0 330 36038040 130
100,000
TEN 5246 061563615 0
METER TIME IN MINUTES AND SECONDS FOR NORMAL
INPUT RATING OF FURNACES EQUIPPED FOR NATURAL
OR LP GAS
INPUT
BTU/HR
METER
SIZE
CU. FT.
HEATING VALUE OF GAS BTU PER CU. FT.
9001000104011002500
MIN. SEC. MIN. SEC. MIN. SEC. MIN. SEC. MIN. SEC.
Table 3
Figure 16: Condensate Drain
DO NOT OVERTIGHTEN DRAIN FITTING
Page 27
IM 862
27
Wiring
Power Supply
1 All wiring should be made in accordance with the
National Electrical Code. Consult the local power
company to determine the availability of sufficient power
to operate the unit. Check the voltage at power supply to
make sure it corresponds to the unit’s RATED
VOLTAGE REQUIREMENT. Install a branch circuit
disconnect near the rooftop, in accordance with the
N.E.C., C.E.C. or local codes.
2 It is important that proper electrical power is available at
the unit. Voltage should not vary more than 10% from
that stamped on the unit nameplate. On three phase units,
phases must be balanced within 3%.
3 For branch circuit wiring (main power supply to unit
disconnect), the minimum wire size for the length of run
can be determined from Table 4 using the circuit ampacity
found on the unit rating plate.
4 For through the base wiring entry reference Figure 18. All
fittings and conduit are field supplied for this application.
Reference the chart with Figure 18 for proper hole and
conduit size.
NOTES:
1 For branch circuit wiring (main power supply to unit
disconnect), the minimum wire size for the length of run can
be determined from this table using the circuit ampacity
found on the unit rating plate. From the unit disconnect to
unit, the smallest wire size allowable in Table 4 may be
used, as the disconnect must be in sight of the unit.
2 Wire size based on 75°C rated wire insulation for 1%
voltage drop.
3 For more than 3 conductors in a raceway or cable, see the
N.E.C. (C.E.C. in Canada) for derating the ampacity of each
conductor.
IMPORTANT: This unit is approved for use with copper
conductors only connected to unit contactor.
Warranty will be voided if aluminum wire is connected to unit
contactor.
Power supply to unit must be disconnected before making
field connections. To avoid electrical shock, personal injury
or death, be sure to rigorously adhere to field wiring
procedures regarding proper lockout and tagout of
components.
▲▲
DANGER
!
Page 28
28IM 862
Hook-Up
To wire unit, refer to the following hook-up diagram.
Refer to Figures 2 and 18 for location of wiring entrances.
Wiring to be done in the field between the unit and devices not
attached to the unit, or between separate devices which are
field installed and located, shall conform with the temperature
limitation for Type T wire [63°F rise (35°C)] when installed in
accordance with the manufacturer’s instructions.
Internal Wiring
A diagram of the internal wiring of this unit is located on the
inside of control access panel and in this manual. If any of the
original wire as supplied with the unit must be replaced, the
wire gauge and insulation must be same as original wiring.
208 Volt Applications
Transformer is factory wired for 230 volts on 208/230 volt
models and must be changed for 208 volt applications. See
unit wiring diagram for 208 volt wiring.
Thermostat
The room thermostat must be compatible with the spark
ignition control on the unit. Generally, all thermostats that are
not of the “current robbing” type are compatible with the
integrated furnace control. The low voltage wiring should be
sized as shown in Table 5.
Install the room thermostat in accordance with the instruction
sheet packed in the box with the thermostat.
Figure 18: Base Entry Locations
Figure 19: Typical Thermostat Wiring
A074502
WIRE SIZE, AWG
14
1/2”
7/8”
12
1/2”
7/8”
10
1/2”
7/8”
8
3/4”
1-31/32”
6
1”
1-23/64”
4
1”
1-23/64”
3
1-1/4”
1-23/32”
2
1-1/4”
1-23/32”
1
1-1/2”
1-31/32”
0
1-1/2”
1-31/32”
00
2”
2-15/32”
000
2”
2-15/32”
CONDUIT SIZE
HOLE SIZE
NOTES: 1. DETERMINE REQUIRED WIRE SIZE FROM MINIMUM CIRCUIT AMPACITY SHOWN IN INSTALLATION & OPERATING INSTRUCTION.
2. BOTTOM POWER ENTRY WILL NOT ACCOMMODATE WIRE LARGER THAN #2 AWG (SHADED AREA).
FIELD GAS
CONNECTION
CONTROL VOLTAGE
KNOCKOUT
WASHERS
CUT HOLE
SIZED PER CHART
OR USE KNOCK OUT
WIRE FROM
ZONE THERMOSTATS
STRAIGHT CONDUIT
FITTING
CONDUIT FROM
ZONE THERMOSTAT
WIRE SIZE FROM
MIN. CIRCUIT AMPACITY
STRAIGHT CONDUIT
FITTING SIZED
PER CHART
CONDUIT FROM
POWER SUPPLY
SIZED PER CHART
POWER WIRES
TO DISCONNECT
POWER WIRES
FROM DISCONNECT
TO CONTACTOR
Table 5
FIELD WIRE SIZE FOR 24 VOLT THERMOSTAT CIRCUITS
SOLID COPPER WIRE - AWG.
3.0161412101010
2.5161412121210
2.0181614121210
50100150200250300
Length of Run – Feet (1)
Thermostat Load -
Amps
(1) The total wire length is the distance from the furnace to the
thermostat and back to the furnace.
NOTE: DO NOT USE CONTROL WIRING SMALLER THAN NO. 18
AWG.
Page 29
IM 862
29
Furnace Section Controls and
Ignition System
Normal Furnace Operating Sequence
This unit is equipped with a two stage integrated direct spark
ignition control.
Normal Heat Mode
Call For First Stage (low fire) Only:
1 Zone thermostat contacts close, a call for first stage (low
fire) heat is initiated.
2 Control runs self check.
3 Control checks the high-limit switch for normally closed
contacts, each pressure switch for normally open contacts,
and all flame rollout switches for continuity.
4 Control energizes each low-fire inducer.
5 Control checks each low-fire pressure switch for closure.
6 If each low-fire pressure switch is closed, the control
starts a 30 second prepurge. If either low-fire pressure
switch is still open after 180 seconds, the high-fire
inducers will be energized until closure.
7 After prepurge timeout, control initiates spark for 2
seconds minimum, 7 second maximum ignition trial,
initiates 120 second, second stage (high fire) warm up
timing.
8 Control detects flame, de-energizes spark and initiates 45
second delay on blower timing.
9 After a fixed 45 seconds indoor blower delay on, the
control energizes the indoor blower.
10 After a fixed 120 seconds second stage warmup period
control checks thermostat input. If only W1 is called for,
W2 is de-energized and the control starts a 30 second off
delay on the W2 inducer.
11 After fixed 30 seconds the W2 inducer is de-energized.
12 Control enters normal operating loop where all inputs are
continuously checked.
13 Zone thermostat is satisfied.
14 Control de-energizes gas valve.
15 Control senses loss of flame.
16 Control initiates 5 second inducer postpurge and 90
second indoor blower delay off.
17 Control de-energizes inducer blower.
18 Control de-energizes indoor blower.
19 Control in the stand by mode with solid red LED.
Call For Second Stage, After First Stage Established; Starting
from A.11:
1 If a call for second stage (high fire) is initiated after a call
for first stage heat is established, the control energizes the
W2 inducer and energizes the second stage of the gas
valve.
2 Control enters normal operating loop where all inputs are
continuously checked.
Second Stage Satisfied; First Stage Still Called For; Starting
From B.3:
1 Once the call for second stage is satisfied, the control
starts a 30 second off delay on W2 inducer and reduces
the gas valve to first stage.
2 Control enters normal operating loop where all inputs are
continuously checked.
First Stage Satisfied:
1 Zone thermostat is satisfied.
2 Control de-energizes gas valve.
3 Control senses loss of flame.
4 Control initiates 5 second inducer postpurge and 90
second indoor blower delay off.
5 Control de-energizes inducer blower.
6 Control de-energizes indoor blower.
7 Control in the stand by mode with solid red LED.
First Stage and Second Stage Called Simultaneously:
1 Zone thermostat contacts close, a call for first stage (low
fire) and second stage (high fire) heat is initiated.
2 Control runs self check.
3 Control checks the high-limit switch for normally closed
contacts, each pressure switch for normally open contacts,
and all flame rollout switches for continuity.
4 Control energizes each low-fire inducer.
5 Control checks each pressure switch for closure.
6 If each low-fire pressure switch is closed, the control
starts a 30 second prepurge. If either switch is still open
after 180 seconds, the high-fire inducers will be energized
until closure.
7 After prepurge timeout, control initiates spark for 2
seconds minimum, 7 second maximum ignition trial, and
initiates 120 second stage warm up timing.
8 Control detects flame, de-energizes spark and starts a 45
second indoor blower delay on timing.
9 After a fixed 45 seconds indoor blower delay on, the
control energizes the indoor blower.
10 After a fixed 120 seconds second stage warmup period
control checks the thermostat input. If W1 and W2 is
present control enters normal operating loop where all
inputs are continuously checked.
First Stage and Second Stage Removed Simultaneously:
1 Upon a loss of W1 and W2 the gas valve is de-energized.
2 Upon a loss of flame, each inducer will complete a 5
second postpurge and the indoor blower will complete a
90 second delay off.
3 Control in the stand by mode with solid red LED.
The integrated control is a four-ignition system.
After a total of four cycles without sensing main burner flame,
the system goes into a 100% lockout mode. After one hour,
the ignition control repeats the prepurge and ignition cycles
for 4 tries and then go into 100% lockout mode again. It
continues this sequence of cycles and lockout each hour until
Page 30
30IM 862
ignition is successful or power is interrupted. During the
lockout mode, neither the ignitor or gas valve will be
energized until the system is reset by turning the thermostat to
the “OFF” position or interrupting the electrical power to the
unit for 3 seconds or longer. The induced draft blower and
main burner will shut off when the thermostat is satisfied.
The circulating air blower will start and run on the heating
speed if the thermostat fan switch is in the “ON” position.
The integrated furnace control is equipped with diagnostic
LED. The LED is lit continuously when there is power to the
control, with or without a call for heat. If the LED is not lit,
there is either no power to the control or there is an internal
component failure within the control, and the control should
be replaced.
If the control detects the following failures, the LED will flash
on for approximately 1/4 second, then off for 3/4 second for
designated failure detections.
1 Flash: Failed to detect flame within the four tries for
ignition.
2 Flash: Pressure switch or induced draft blower problem
detected.
3 Flash: High limit or auxiliary limit open.
4 Flash: Flame sensed and gas valve not energized or flame
sensed with no “W” signal.
5 Flash: Overtemperature switch open.
Operating Instructions
This unit is equipped with integrated furnace control. This
device lights the main burners each time the room thermostat
(closes) calls for heat. See operating instructions on the back
of the furnace/controls access panel.
To Start The Furnace
1 Set the thermostat to its lowest setting.
2 Turn off all electric power to the unit.
3 This unit does not have a pilot. It is equipped with an
ignition device which automatically lights the burner. Do
not try to light the burner by hand.
4 Remove control door.
5 Move control knob to the “OFF” position. Turn the knob
by hand only, do not use any kind of tool.
6 Wait five (5) minutes to clear out any gas. Then smell for
gas, including near the floor. If you smell gas, STOP!
Follow B in the safety information on the Operating
Instructions located on the back of the controls/access
panel. If you don’t smell gas, go to the next step.
7 Move the gas control knob from “OFF” position to “ON”
position. Operate this unit with the gas control knob in the
“ON” position only. Do not use the gas control knob as a
means for throttling the burner input rate.
8 Replace the control door.
9 Turn on all electric power to the unit.
10 Set the thermostat to the desired setting.
11 If the unit will not operate, follow the instructions below
on how to shut down the furnace.
The initial start-up on a new installation may require the
control system to be energized for some time until air has bled
through the system and fuel gas is available at the burners.
To Shut Down Furnace
1 Set the thermostat to the lowest setting.
2 Turn off all electric power to the unit if service is to be
performed.
3 Remove control door.
4 Move control knob to the “OFF” position.
5 Replace control door.
Burners
Burners for these units have been designed so that field
adjustment is not required. Burners are tray-mounted and
accessible for easy cleaning when required.
Manual Reset Overtemperature Control
Two manual reset overtemperature controls are located on the
burner shield. These devices senses blockage in the heat
exchanger or insufficient combustion air. This shuts off the
main burners if excessive temperatures occur in the burner
compartment.
Operation of this control indicates an abnormal condition.
Therefore, the unit should be examined by a qualified installer,
service agency, or the gas supplier before being placed back
into operation.
Never test for gas leaks with an open flame. It can cause an
explosion or fire resulting in property damage, personal
injury or death. Use a commercially available soap solution
made specifically for the detection of leaks to check all
connections as specified in the Gas Supply and Piping
section of these instructions.
▲▲
DANGER
!
The spark ignitor and ignition lead from the ignition
control are high voltage. Keep hands or tools away to
prevent electrical shock. Shut off electrical power
before servicing any of the controls. Failure to adhere
to this warning can result in personal injury or death.
▲▲
DANGER
!
Should overheating occur or the gas supply fail to shut off,
shut off the manual gas valve to the unit before shutting off
the electrical supply. Failure to do so can result in an
explosion or fire causing property damage, severe personal
injury or death!
▲▲
DANGER
!
Page 31
IM 862
31
Pressure Switch
This furnace has two pressure switches for sensing a blocked
exhaust or a failed induced draft blower. They are normally
open and close when the induced draft blower starts,
indicating air flow through the combustion chamber.
Limit Control
The supply air high temperature limit cut-off is set at the
factory and cannot be adjusted. It is calibrated to prevent the
air temperature leaving the furnace from exceeding the
maximum outlet air temperature.
IMPORTANT: Replace this control only with the identical
replacement part.
System Operating Information
Advise The Customer
1 Change the air filters regularly. The heating system
operates better, more efficiently and more economically.
2 Except for the mounting platform, keep all combustible
articles three feet from the unit and exhaust system.
3 IMPORTANT: Replace all blower doors and compartment
cover after servicing the unit. Do not operate the unit
without all panels and doors securely in place.
4 Do not allow snow or other debris to accumulate in the
vicinity of the unit.
Furnace Section Maintenance
The unit’s furnace should operate for many years without
excessive scale build-up in flue passageways; however, it is
recommended that a qualified installer, service agency, or the
gas supplier annually inspect the flue passageways, the
exhaust system and the burners for continued safe operation,
paying particular attention to deterioration from corrosion or
other sources.
If during inspection the flue passageways and exhaust system
are determined to require cleaning, the following procedures
should be followed (by a qualified installer, service agency,
or gas supplier):
1 Turn off the electrical power to the unit and set the
thermostat to the lowest temperature.
2 Shut off the gas supply to the unit either at the meter
or at manual valve in the supply piping.
3 Remove the furnace controls access panel and the control
box cover.
4 Disconnect the gas supply piping from the gas valve.
5 Disconnect the wiring to the induced draft blower motor,
gas valve, flame sensor, and flame roll-out control, and
ignitor cable. Mark all wires disconnected for proper
reconnection.
6 Remove the screws (4) connecting the burner tray to the
heat exchanger mounting panel.
7 Remove the burner tray and the manifold assembly from
the unit.
8 Remove the screws (10) connecting the two induced draft
blowers to the collector box and screws (12) connecting
the inducer mounting plate to the heat exchanger center
panel. Remove the induced draft blower and the collector
box from the unit.
9 Remove the turbulators from inside the heat exchangers by
inserting the blade of a screwdriver under the locking tabs.
Pop the tabs out of the expanded grooves of the heat
exchanger. Slide the turbulators out of the heat
exchangers.
10 Direct a water hose into the outlet of the heat exchanger
top. Flush the inside of each heat exchanger tube with
water. Blow out each tube with air to remove excessive
moisture.
11 Reassemble (steps 1 through 9 in reverse order). Be
careful not to strip out the screw holes used to mount
the collector box and inducer blower. Replace inducer
blower gasket and collector box gasket with factory
replacements if damaged.
The manufacturer recommends that a qualified installer,
service agency or the gas supplier visually inspect the burner
flames for the desired flame appearance at the beginning of
the heating season and approximately midway in heating
season.
DO NOT JUMPER THIS DEVICE! DO NOT reset the overtemperature control without taking corrective action to
assure that an adequate supply of combustion air is
maintained under all conditions of operation. Failure to do
so can result in carbon monoxide poisoning or death.
Replace this control only with the identical replacement part.
▲▲
DANGER
!
Do not jumper this device! Doing so can cause a fire or
explosion resulting in property damage, personal injury or
death.
▲▲
DANGER
!
Label all wires prior to disconnection when servicing
controls. wiring errors can cause improper and dangerous
operation resulting in fire, electrical shock, property
damage, personal injury or death.
▲▲
DANGER
!
Holes in the exhaust transition or heat exchanger can cause
toxic fumes to enter the home. The exhaust transition or
heat exchanger must be replaced if they have holes or
cracks in them. Failure to do so can cause carbon
monoxide poisoning resulting in personal injury or death.
▲▲
DANGER
!
Page 32
32IM 862
The manufacturer also recommends that a qualified installer,
service agency or the gas supplier clean the flame sensor with
steel wool at the beginning of the heating season.
Lubrication
IMPORTANT: DO NOT attempt to lubricate the bearings on the
blower motor or the induced draft blower motor. Addition of
lubricants can reduce the motor life and void the warranty.
The blower motor and induced draft blower motor are
prelubricated by the manufacturer and do not require further
attention.
A qualified installer, service agency or the gas supplier must
periodically clean the motors to prevent the possibility of
overheating due to an accumulation of dust and dirt on the
windings or on the motor exterior. And, as suggested
elsewhere in these instructions, the air filters should be kept
clean because dirty filters can restrict air flow and the motor
depends upon sufficient air flowing across and through it to
prevent overheating.
Cooling Section Maintenance
It is recommended that at the beginning of each cooling
season a qualified installer or service agency inspect and clean
the cooling section of this unit. The following areas should be
addressed: evaporator coil. condenser coil, condenser fan
motor and venturi area.
To inspect the evaporator coil:
1 Open the control/filter access panel and remove filters.
Also, remove blower access panel. In downflow
applications remove the horizontal return to gain access.
2 Shine a flashlight on the evaporator coil (both sides) and
inspect for accumulation of lint, insulation, etc.
3 If coil requires cleaning, follow the steps shown below.
Cleaning Evaporator Coil
1 The coil should be cleaned when it is dry. If the coil is
coated with dirt or lint, vacuum it with a soft brush
attachment. Be careful not to bend the coil fins.
2 If the coil is coated with oil or grease, clean it with a mild
detergent-and-water solution. Rinse the coil thoroughly
with water. IMPORTANT: Do not use excessive water
pressure. Excessive water pressure can bend the fins and
tubing of the coil and lead to inadequate unit performance.
Be careful not to splash water excessively into unit.
3 Inspect the drain pan and condensate drain at the same
time the evaporator coil is checked. Clean the drain pan by
flushing with water and removing any matters of
obstructions which may be present.
4 Go to next section for cleaning the condenser coil.
Cleaning Condenser Coil, Condenser Fan,
Circulation Air Blower and Venturi
1 Remove the compressor access panel. Disconnect the
wires to the condenser fan motor in the control box (see
wiring diagram).
2 The coil should be cleaned when it is dry. If the coil is
coated with dirt or lint, vacuum it with a soft brush
attachment. Be careful not to bend the coil fins.
3 If the coil is coated with oil or grease, clean it with a mild
detergent-and-water solution. Rinse the coil thoroughly
with water. IMPORTANT: Do not use excessive water
pressure. Excessive water pressure can bend the fins and
tubing of the coil and lead to inadequate unit performance.
Be careful not to splash water excessively into unit.
4 The venturi should also be inspected for items of
obstruction such as collections of grass, dirt or spider
webs. Remove any that are present.
5 Inspect the circulating air blower wheel and motor for
accumulation of lint, dirt or other obstruction and clean it
necessary. Inspect the blower motor mounts and the
blower housing for loose mounts or other damage. Repair
or replace if necessary.
Re-assembly
1 Reconnect fan motor wires per the wiring diagram
attached to the back of the cover.
2 Close the filter control and replace the blower/evaporator
coil access panels.
3 Replace the control box cover.
4 Restore electrical power to the unit and check for proper
operation, especially the condenser fan motor.
Power supply to unit must be disconnected before making
field connections. To avoid electrical shock, personal injury
or death, be sure to rigorously adhere to field wiring
procedures regarding proper lockout and tagout of
components.
▲▲
DANGER
!
Power supply to unit must be disconnected before making
field connections. To avoid electrical shock, personal injury
or death, be sure to rigorously adhere to field wiring
procedures regarding proper lockout and tagout of
components.
▲▲
DANGER
!
Label all wires prior to disconnection when servicing the
unit. Wiring errors can cause improper and dangerous
operation resulting in fire, electrical shock, property
damage, severe personal injury or death.
▲▲
DANGER
!
Page 33
IM 862
33
Replacement Parts
To find your local McQuay Certified Parts Distributor, go to
www.mcquay.com and select Parts Locator.
Troubleshooting
Refer to Figures 20 and 21 for determining cause of unit
problems.
Wiring Diagrams
Figures 22 through 27 are complete wiring diagrams for the
unit and its power sources. Also located on back of
compressor access panel.
Charging
See Figures 28 through 31 for proper charging information.
High vapor pressure• Excessive load• Recheck load calculation
• Defective compressor• Replace
Fluctuating head & vapor• Air or non-condensibles in system• Recover refrigerant, evacuate & recharge
pressures
Gurgle or pulsing noise at• Air or non-condensibles in system• Recover refrigerant, evacuate & recharge
expansion device or liquid line
Cooling Trouble Shooting Chart
Disconnect all power to unit before servicing. Contactor may break only one side. Failure to shut off power can cause electrical
shock resulting in personal injury or death.
▲▲
DANGER
!
Figure 20
Page 39
IM 862
39
SET THERMOSTAT TO
CALL FOR HEAT
SET FAN SWITCH TO AUTO
START
FLOW CHART CONTINUED ON NEXT PAGE
NO
YES
YES
YES
YES
NO
NO
NO
INDUCED DRAFT BLOWER
MOTOR STARTS
30 SECOND PREPURGE
REPLACE INTEGRATED
CONTROL BOARD (IFC)
REPLACE INDUCED
DRAFT BLOWER
NO
REPLACE NEGATIVE
PRESSURE SWITCH
REPLACE INTEGRATED
CONTROL BOARD (IFC)
IF WIRING IS OK
CHECK FOR EXHAUST,
INTAKE OR HEAT
EXCHANGER BLOCKAGE
AND RESET CONTROL
NO
REPLACE IGNITION
CONTROL
YES
REPLACE VALVE
• CHECK LINE VOLTAGE TO IFC
• CHECK LOW VOLTAGE TRANSFORMER
• CHECK WIRING
• CHECK FOR 208-230 VAC TO IDM MOTOR
• CHECK IGNITOR CABLE
• CHECK SPARK IGNITOR POSITION AND CONDITION
• IS EACH NEGATIVE PRESSURE SWITCH CLOSED?
• CHECK FOR OPEN ROLL-OUT CONTROLS
• CHECK FOR OPEN LIMIT
• CHECK IGNITION CONTROL CHASSIS GROUND WIRE
• CHECK WIRING
• CHECK INLET GAS PRESSURE
• CHECK 24 VOLTS TO GAS VALVE
• CHECK FOR GAS FLOW TO AND FROM VALVE
• CHECK BURNER CARRYOVER
NOTE: THE SYSTEM WILL ATTEMPT TO LIGHT 4 TIMES WITH A 60 SECOND INTER-
PURGE BETWEEN TRIES. IF AFTER THE THIRD TIME THE BURNERS
DO NOT LIGHT, THE SYSTEM WILL LOCK OUT. IF THE UNIT IS EQUIPPED WITH A
UNITED TECH. THE SYSTEM WILL ATTEMPT TO LIGHT 4 TIMES EACH HOUR
UNTIL THE BURNERS LIGHT OR THE THERMOSTAT IS RESET OR POWER IS
REMOVED FOR 3 SECONDS OR GREATER.
YES
YES
IGNITOR SPARKS
MAIN BURNER LIGHTS
NO
• CHECK NEGATIVE PRESSURE
SWITCH SENSING TUBE
• CHECK FOR EXHAUST
BLOCKAGE
YES
YES
YES
REPLACE IGNITOR/
CABLE ASSEMBLY
REPLACE LIMIT
IF UNIT IS COLD
NO
HAZARDOUS VOLTAGE
LINE VOLTAGE
CONNECTIONS
DISCONNECT POWER BEFORE
SERVICING.
SERVICE MUST BE BY A TRAINED,
QUALIFIED SERVICE TECHNICIAN.
▲▲
WARNING
!
Figure 21: Furnace Troubleshooting Guide (Combination Heating and Cooling Units with Direct Spark Ignition)
Page 40
40IM 862
NOTE: IF THE SYSTEM GOES INTO LOCKOUT,WAIT
30 SECONDS AND RESET THE SYSTEM.
• CHECK FLAME SENSOR POSITION AND CONDITION
• CLEAN FLAME SENSOR WITH STEEL WOOL
• CHECK FLAME SENSOR WIRES AND CONNECTIONS
• CHECK FOR 208-230 VAC ACROSS BLOWER
MOTOR TERMINALS ON CONTROL BOARD
• CHECK FOR LINE VOLTAGE AT LOAD SIDE OF
BLOWER CONTACT.
YES
YES
NO
MAIN BURNER FLAME SUSTAINED
YES
NO
INDOOR BLOWER MOTOR STARTS
AFTER 45 SECONDS
REPLACE SENSOR
NO
REPLACE INTEGRATED
CONTROL BOARD (IFC)
NO
REPLACE IGNITION
CONTROL
YES
REPLACE BLOWER
MOTOR
• CHECK FOR OPEN LIMIT
• CHECK FOR OPEN ROLL-OUT CONTROL
• CHECK FOR PROPER THERMOSTAT OPERATION
• REMOVE VALVE LEAD AT GAS VALVE
IF VALVE CLOSES, RECHECK THE THERMOSTAT
AND WIRING. IF OK,THEN REPLACE VALVE
YES
NO
SYSTEM RUNS UNTIL
CALL FOR HEAT ENDS
TROUBLESHOOTING ENDS
REPEAT PROCEDURE UNTIL TROUBLE FREE
OPERATION IS OBTAINED.
YES
NO
TURN THERMOSTAT OFF
VALVE SHUTS OFF
FLAME SHUTS OFF
YES
INDUCED DRAFT MOTOR STOPS
AFTER 5 SECOND POSTPURGE
YES
YES
• CHECK FOR DIRTY FILTERS
• CHECK FOR RESTRICTED
AIR-FLOW
CHECK FOR EXHAUST,
INTAKE OR HEAT
EXCHANGER BLOCKAGE
CLEAR BLOCKAGE AND
RESET CONTROL
YES
INDOOR BLOWER MOTOR STOPS
AFTER 90 SECONDS
YES
FURNACE STARTS ON LOW OR HIGH
FIRE. FURNACE SWITCHES TO LOW
FIRE AFTER 120 SECONDS WARMUP
IF THERMOSTAT IS CALLING FOR W1.
FURNACE WILL SWITCH TO HIGH
FIRE IF LOW FIRE DOES NOT SATISFY
THERMOSTAT DEMAND FOR HEAT
LOAD.
Figure 21: Furnace Troubleshooting Guide (Combination Heating and Cooling Units with Direct Spark Ignition) - continued
Now that you have made an investment in modern, efficient McQuay equipment, its care should be a high priority.
For training information on all McQuay HVAC products, please visit us at www.mcquay.com and click on training, or
call 540-248-9646 and ask for the Training Department.
Warranty
All McQuay equipment is sold pursuant to its standard terms and conditions of sale, including Limited Product
Warranty. Consult your local McQuay Representative for warranty details. Refer to Form 933-43285Y. To find your
local McQuay Representative, go to www.mcquay.com.
This document contains the most current product information as of this printing. For the most up-to-date product
information, please go to www.mcquay.com.
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