Daikin GPGM5 User manual
Prior to installation, thoroughly familiarize yourself with this
Installation Manual. Observe all safety warnings. During in-
stallation or repair, caution is to be observed.
It is your responsibility to install the product safely and to
educate the customer on its safe use.
These installation instructions cover the outdoor installa-
tion of self contained package air conditioners and heating
model for information regarding accessories.
“IMPORTANT - This product has been designed and manufactured to meet ENERGY STAR®
criteria for energy eciency when matched with appropriate coil components. However,
proper refrigerant charge and proper air ow are critical to achieve rated capacity and
eciency. Installation of this product should follow the manufacturer’s refrigerant charging
and air ow instructions. Failure to conrm proper charge and air ow may reduce energy
eciency and shorten equipment life.”
Please contact your distributor or our website
manual.
This Forced Air Central Unit Design Complies With Re-
quirements Embodied In The American National Standard /
National Standard of Canada Shown Below.
Daikin Comfort Technologies Manufacturing, L.P.
19001 Kermier Rd., Waller, TX 77484
www.goodmanmfg.com
© 2022 Daikin Comfort Technologies Manufacturing, L.P.
IOG-3026
06/2022
2
REPLACEMENT PARTS................................................. 2
.......................................................... 2
SAFETY INSTRUCTIONS .............................................. 3
......................................................... 3
............................................................. 3
GENERAL INFORMATION ............................................. 5
........................................... 5
UNIT LOCATION.............................................................. 6
....................................................... 6
........................... 6
.................................... 6
................................ 7
RIGGING DETAILS ......................................................... 7
........................................................... 7
GAS PIPING..................................................................... 7
.... 8
........................................................................... 8
.................................................... 9
PROPANE GAS INSTALLATIONS ................................. 9
........................................................ 9
ELECTRICAL WIRING .................................................. 10
.............................................. 10
....................................... 10
............................................................. 11
CIRCULATING AIR AND FILTERS............................... 12
................................................ 12
.................................................................. 12
....................................................................... 12
........................................................................ 13
......................... 13
.......... 13
CONDENSATE DRAIN.................................................. 13
.............................. 13
NORMAL SEQUENCES OF OPERATION .................. 13
..................................................................... 13
..................................................................... 14
................................................................... 14
STARTUP, ADJUSTMENTS, AND CHECKS ............... 14
....................................................... 14
.................... 16
........................................ 16
............................... 17
...................................................... 18
TABLE OF CONTENTS
.............................................. 18
................................................ 18
TROUBLESHOOTING .................................................. 19
.............................. 19
............................................................. 19
............................... 19
19
19
20
20
20
20
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20
...................................................... 20
MAINTENANCE............................................................. 21
.......................... 21
................................... 21
... 21
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............. 21
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.... 21
.................................................... 22
ACCESSORIES AND FUNCTIONAL PARTS.............. 22
...................................... 22
..................................................... 22
............................................... 22
APPENDIX ...................................................................... 23
..... 23
.............................................. 23
.............................................. 23
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.................................................. 28
When reporting shortages or damages, or ordering repair
parts, give the complete unit model and serial numbers as
stamped on the unit’s nameplate.
Replacement parts for this appliance are available through
your contractor or local distributor. For the location of your
nearest distributor, consult the white business pages, the
HOMEOWNER SUPPORT
Daikin Comfort Technologies Manufacturing, L.P.
19001 KERMIER ROAD
WALLER, TEXAS 77484
3
Before installing this unit, please read this manual to
adhered to, including maximum external static pressure to
unit, air temperature rise, minimum or maximum CFM and
motor speed connections.
warranty carefully and note what is covered. Keep the
necessary.
Keep this literature in a safe place for future reference.
4
5
CO can cause serious illness including permanent brain
damage or death.
Advertencia especial para la instalación de calentadores ó manejadoras
de aire en áreas cerradas como estacionamientos ó cuartos de servicio.
El monóxido de carbono puede causar enfermedades severas
como daño cerebral permanente ó muerte.
Las emisiones de monóxido de carbono pueden circular a través
del aparato cuando se opera en cualquier modo.
RISQUE D'EMPOISONNEMENT AU MONOXYDE DE CARBONE
Le monoxyde de carbone peut causer des maladies graves telles que
des dommages permanents au cerveau et meme la mort.
Cette ventilation est nécessaire pour éviter le danger d'intoxication
au CO pouvant survenir si un appareil produisant du monoxyde
de carbone continue de fonctionner au sein de la zone confinée.
This unit is approved for outdoor installation ONLY.
Rated performance is achieved after 20 hours of operation.
-
www.
goodmanmfg.com for Goodman® brand products. Within
the website, please select the residential or commercial
products menu and then select the submenu for the type
of product to be installed, such as air conditioners or heat
pumps, to access a list of product pages that each contain
must be installed, operated, and maintained in accordance
with these installation and operating instructions, all local
building codes and ordinances, or in their absence, with the
latest edition of the National Fuel Gas Code NFPA 54/ANSI
Z223.1 and National Standard of Canada CAN/CSA B149
Installation Codes.
The heating and cooling capacities of the unit should be
greater than or equal to the design heating and cooling
loads of the area to be conditioned. The loads should be
calculated by an approved method or in accordance with
A.S.H.R.A.E. Guide or Manual J - Load Calculations pub-
lished by the Air Conditioning Contractors of America.
American National Standards Institute
25 West 43rd Street ,4th Floor
New York, NY 10036
Check the carton upon arrival for external damage. If
damage is found, a request for inspection by carrier agent
should be made in writing immediately.
Carefully inspect the unit for damage including damage to
the cabinetry. Any bolts or screws which may have loos-
ened in transit must be re-tightened. In the event of dam-
1. Make notation on delivery receipt of any visible dam-
age to shipment or container.
2. Notify carrier promptly and request an inspection.
3. In case of concealed damage, carrier should be noti-
4. File the claim with the following supporting docu-
a.
bond.
b. Original paid freight bill or indemnity in lieu there-
of.
c.
trade and other discounts or reductions.
d. Copy of the inspection report issued by carrier
representative at the time damage is reported to
the carrier. The carrier is responsible for making
prompt inspection of damage and for a thorough
investigation of each claim. The distributor or
manufacturer will not accept claims from dealers
for transportation damage.
6
•
and proper condensate drainage, the unit must be
mounted level.
•
building, and at least three feet above any forced air
inlet located within ten feet. The economizer/manual
fresh air intake/motorized fresh air intake and com-
by this restriction.
• To avoid possible corrosion of the heat exchanger,
do not locate the unit in an area where the outdoor
contaminated by compounds containing chlorine or
swimming pool chemicals and chlorine bleaches, paint
stripper, adhesives, paints, varnishes, sealers, waxes
industrial processes may also be sources of chlorine/
• To avoid possible illness or death of the building
occupants, do NOT locate outside air intake device
-
-
es required, consult local codes.
• Allow minimum clearances from the enclosure for
These clearances must be permanently maintained.
•
unit must never be obstructed. If used, do not allow
the economizer/manual fresh air damper/ motorized
fresh air damper to become blocked by snow or de-
bris. In some climates or locations, it may be neces-
sary to elevate the unit to avoid these problems.
• When the unit is heating, the temperature of the return
air entering the unit must be between 50°F and 100°F.
• Units manufactured on or after May 1, 2017 are not
permitted to be used in Canada for heating of build-
ings or structures under construction.
• When the unit is installed on the ground adjacent to
-
ommended. Prepare a base that is 3” larger than the
package unit footprint and a minimum of 3” thick.
•
water from higher ground can collect in the unit.
• The top of the unit should be completely unobstructed.
If units are to be located under an overhang, there
should be a minimum of 48” clearance and provisions
overhang.
• Close to the wall application assures free, unobstruct-
-
tion spaces, such as corners provide a minimum 12”
clearance on all air inlet sides. Allow 36” minimum for
service access to the compressor compartment and
controls.
• Unit should be located a minimum of away from the
wall with the connections facing the wall.
• To avoid possible property damage or personal injury,
-
required by local codes. Consult a structural engineer
to determine the weight capabilities of the roof.
•
Class A, Class B, or Class C roof covering material.
•
for service personnel should be provided.
7
•
to locating and mounting the curb and package unit.
• Ductwork must be constructed using industry guide-
lines. The duct work must be placed into the roof curb
before mounting the package unit.
• -
ing material are furnished by the contractor.
D14CRBPGCHMA
Refer to the Roof Curb Installation Instructions for proper
curb installation. Curbing must be installed in compliance
Lower unit carefully onto roof mounting curb. While rigging
unit, center of gravity will cause condenser end to be lower
than supply air end.
Unit should be lifted by the located at the
Lifting cables should be attached to the
unit with shackles. While rigging unit, center of gravity will
air end
The distance between the unit and the crane hook up
should not be than The spreaders bars should
span over the unit to prevent damage to the cabinet from
the lifting cables.
8
The rating plate is stamped with the model number, type of
gas and gas input rating. Make sure the unit is equipped to
operate on the type of gas available. Conversion to LP gas
is permitted with the use of a factory authorized conversion
sheet for your model for a listing of approved LP gas con-
the LP kit for conversion from natural gas to propane gas.
The minimum supply pressure should not vary from that
shown in the Inlet Gas Pressure table because this could
prevent the unit from having dependable ignition. In addi-
tion, gas input to the burners must not exceed the rated
result in premature heat exchanger failure.
Natural Min. 5.0" W.C., Max. 10.0" W.C.
Propane Min. 11.0" W.C., Max. 13.0" W.C.
INLET GAS PRESSURE
Inlet Gas Pressure Must be within the Minimum and Maximum Value
Shown in Table Above.
-
tude Conversion Kit available with this furnace.
The rating plate is stamped with the model number, type of
gas and gas input rating. Make sure the unit is equipped to
operate on the type of gas available. The gas line instal-
lation must comply with local codes, or in the absence of
local codes, with the latest edition of the National Fuel Gas
Code NFPA 54/ANSI Z223.1.
Refer to the Proper Piping Practice drawing for the general
1.
permitted as long as it is in agreement with local
codes.
2. Use pipe joint compound on male threads only. Pipe
joint compound must be resistant to the action of the
fuel used.
3. Use ground joint unions.
4. Install a drip leg to trap dirt and moisture before it can
enter the gas valve. The drip leg must be a minimum
of three inches long.
5. Use two pipe wrenches when making connection to
the gas valve to keep it from turning.
6.
7. Tighten all joints securely.
8. The unit must be connected to the building piping by
•
• -
minum alloy tubing must not be used in exterior
• Listed gas appliance connectors used in accor-
dance with the terms of their listing that are com-
pletely in the same room as the equipment
• In the prior two methods above the connector or
tubing must be protected from physical and thermal
damage. Aluminum alloy tubing and connectors
must be coated to protect against external corro-
sion when in contact with masonry, plaster or insu-
lation or are subject to repeated wettings by liquids
9
Len
g
th of
Pipe in Feet 1/2 3/4 11 1/4 1 1/2
10 132 278 520 1050 1600
20 92 190 350 730 1100
30 73 152 285 590 980
40 63 130 245 500 760
50 56 115 215 440 670
60 50 105 195 400 610
70 46 96 180 370 560
80 43 90 170 350 530
90 40 84 160 320 490
100 38 79 150 305 460
Pressure = .50 PSIG or less and Pressure Drop of 0.3" W.C. (Based
on 0.60 Specific Gravity Gas)
Natural Gas Capacity of Pipe
in CubicFeet of Gas Per Hour(CFH)
Nominal Black Pipe Size (inches)
BT UH Fu rn ace Input
Heatin
g
Value of G as
(
BTU/Cubic Foot
)
CFH =
There will be air in the gas supply line after testing for leaks
on a new installation. Therefore, the air must be bled from
the line by loosening the ground joint union until pure gas
gas has been dissipated in the air. Be certain there is no
The unit is placed in operation by closing the main electri-
cal disconnect switch for the unit.
All propane gas equipment must conform to the safety
For satisfactory operation, propane gas supply pressure
must be within 9.7 - 10.3 inches W.C. at the manifold with
all gas appliances in operation. Maintaining proper gas
1.
-
tainer or containers.
2. Proper pressure regulation.
3. Pressure drop in lines between regulators, and be-
tween second stage regulator and the appliance. Pipe
size required will depend on length of pipe run and
total load of all appliances.
Complete information regarding tank sizing for vaporiza-
tion, recommended regulator settings and pipe sizing is
available from most regulator manufacturers and propane
gas suppliers.
Since propane gas will quickly dissolve white lead or most
standard commercial compounds, special pipe dope must
be used. Shellac base compounds resistant to the actions
Clyde’s® or John Crane® are satisfactory.
arrangement.
10
IG
IG
IG
Sizing Between First and Second Stage Regulator
Maximum Propane Capacities listed are based on 1 PSIG Pressure Drop at 10
PSIG Setting. Capacities in 1,000 BTU/HR
3/8"1/2"5/8"3/4" 7/8" 1/2" 3/4"
30 309 700 1,3032,205 3,394 1,843 3,854
40 265 599 1,1151,887 2,904 1,577 3,298
50 235 531 988 1,672 2,574 1,398 2,923
60 213 481 896 1,515 2,332 1,267 2,649
70 196 446 824 1,394 2,146 1,165 2,437
80 182 412 767 1,297 1,996 1,084 2,267
90 171 386 719 1,217 1,873 1,017 2,127
100161 365 679 1,149 1,769 961 2,009
150130 293 546 923 1,421 772 1,613
200111 251 467 790 1,216 660 1,381
250 90 222 414 700 1,078 585 1,224
300 89 201 378 634 976530 1,109
350 82 185 345 584 898488 1,020
400 76 172 321 543 836454949
To convert to Capacities at 15 PSIG Settings -- Multiply by 1.130
To convert to Capacities at 5 PSIG Settings -- Multiply by 0.879
PIPE OR
TUBING
LENGTH,
FEET
NOMINAL PIPE SIZE,
SCHEDULE 40
TUBING SIZE, O.D., TYPE L
Sizing Between Single or Second Stage Regulator and Appliance*
Maximum Propane Capacities Listed are Based on 1/2" W.C. Pressure Drop at
11" W.C. Setting. Capacities in 1,000 BTU/HR
3/8"1/2" 5/8" 3/4"7/8"1/2" 3/4" 1" 1-1/4" 1-1/2"
10 49 110206348539291608 1,146 2,353 3,525
20 34 76 141239368200418788 1,617 2,423
30 27 61 114192296161336632 1,299 1,946
40 23 52 97 164253137284541 1,111 1,665
50 20 46 86 146224122255480985 1,476
60 19 42 78 132203110231436892 1,337
80 16 36 67 113174 94 198372764 1,144
100 14 32 59 100154 84 175330677 1,014
125 12 28 52 89 137 74 155292600899
150 11 26 48 80 124 67 141265544815
200 10 22 41 69 106 58 120227465697
250 9 19 36 61 94 51 107201412618
300 8 18 33 55 85 46 97 182374560
350 7 16 30 51 78 43 89 167344515
400 7 15 28 47 73 40 83 156320479
*DATA IN ACCORDANCE WITH NFPA PAMPHLET NO. 54
NOMINAL PIPE SIZE,
SCHEDULE 40
TUBING SIZE, O.D., TYPE L
PIPE OR
TUBING
LENGTH,
FEET
has good air circulation.
Movement of air must not be obstructed by furniture, door,
draperies, etc. The thermostat must not be mounted where
television, etc. Consult the Instruction Sheet packaged with
thermostat for mounting instructions.
All units have two stages of heating and two stages of
mechanical cooling. Units which will have economizers
may use thermostats with two or three stages of cooling.
All units can use single stage or multi-stage thermostats.
The units are designed for operation on 60 hertz current
and at voltages as shown on the rating plate. All internal
wiring in the unit is complete. It is necessary to bring in the
power supply to the contactor as shown on the unit wiring
diagram which is supplied with each unit. The low voltage
wiring must be connected between the unit control panel
and the room thermostat.
11
To use a single stage thermostat, move jumper located
to the left of the terminal strip labeled “Stage Delay” from
NONE to “5” or “10” minutes. This selection will cause the
-
cooling and heating modes. If the jumper is not moved, only
low-stage cool and low-stage heat will operate.
Refer to the unit wiring diagram for electrical connections.
When installed, the unit must be electrically grounded in
accordance with local codes or in the absence of local
codes, with the National Electrical Code, ANSI/NFPA No.
70, and/or the CSA C22.1 Electrical Code. Ensure low volt-
age connections are waterproof.
R C W1W2 GY1 Y2
RY2
CY1
W1 G
W2
Integrated
Control Module
Thermostat
Two-Stage Heating
with
Two-Stage Cooling
5 MINUTE DELAY
PERIOD WITH
JUMPER IN THIS
POSITION
10 MINUTE DELAY
PERIOD WITH
JUMPER IN THIS
POSITION
For unit protection, use a fuse or hacr circuit breaker that
is in excess of the circuit ampacity, but less than or equal
to the maximum overcurrent protection device. DO NOT
SHOWN ON UNIT DATA PLATE.
197 253
All line voltage connections must be made through weath-
must be in approved weatherproof conduit.
DO NOT use gas piping, or conduit as an electrical ground.
Low voltage wiring from the unit control panel to the ther-
mostat requires coded cable. See below for ground level
and rooftop wiring.
12
The induced draft blower on some models is equipped
lead on the “PARK” terminal located on ignition control.
Connect incoming power leads to terminals L1 & L2 on
contactor in the electrical control section, using wire sizes
BRANCH CIRCUIT AMPACITY 15 20 25 30 35 40 45 50
SUPPLY WIRE LENGTH -
FEET
200 64443322
150 86644433
100 10 8866644
50 14 12 10 10 8866
Units can easily be converted from horizontal to down-dis-
installations, the installer should measure the total external
static and review the blower performance charts before
performing the installation. In some installations it will be
necessary to change the blower speed to provide proper
Single phase models are shipped without horizontal duct
covers. If needed, these kits may be ordered through
Goodman’s Service Parts department.
Cut insulation around bottom openings and remove panels
from the bottom of the unit, saving the screws holding the
panels in place.
Duct systems and register sizes must be properly designed
for the C.F.M. and external static pressure rating of the
unit. Ductwork should be designed in accordance with the
recommended methods of Air Conditioning Contractors of
-
weatherproof barrier and adequate insulation.
A duct system should be installed in accordance with
Standards of the National Board of Fire Underwriters for
the Installation of Air Conditioning, Warm Air Heating and
The supply duct from the unit through a wall may be
installed without clearance. However, minimum unit clear-
ances as shown in the appendix must be maintained. The
supply duct should be provided with an access panel large
enough to inspect the air chamber downstream of the heat
exchanger. A cover should be tightly attached to prevent
air leaks.
Dimension illustration in the appendix.
For down-discharge applications, the ductwork should
be attached to the roof curb prior to installing the unit.
Ductwork dimensions are shown in the roof curb installa-
tion manual.
If desired, supply and return duct connections to the unit
unit operating sound transmission.
information.
13
Filters installed external to the unit should be sized in
accordance with their manufacturer recommendations. A
of 300 feet per minute.
UNIT 2 Ton 2 1/2 Ton 3 Ton 3 1/2 /4 Ton
Min. Filter Size (1)20 x 20 x 1 (1)20 x 25 x1 (1)25 x 25 x1 (2)20 x 20 x 1
1.
2.
3.
4. Using the three screws provided, attach the hood
opening in the utility panel.
SCREEN
HOOD
LOWER
FLUE
HOOD
LIP
1. Locate the second hood.
2. Using the three screws provided, attach the hood
access door.
A 3/4” NPT drain connection is supplied for condensate
piping. An external trap must be installed for proper con-
densate drainage.
DRAIN
CONNECTION
UNIT 2" MINIMUM
FLEXIBLE
TUBING-HOSE
OR PIPE
3" MINIMUM
A POSITIVE LIQUID
SEAL IS REQUIRED
This unit is equipped with an ignition control that automat-
ically lights the main burner. DO NOT attempt to light the
main burners by any other method.
1. Thermostat calls for low or high stage heating.
2. Induced draft blower energizes for 15-second pre-
purge.
3. The spark igniter and low and high stage gas valve
are energized for 7 seconds. The igniter pro-
duces a very intense electrical spark that ignites the
gas.
4. Main burners light and control detects presence of
5. If the call is for low stage heat, the induced draft blow-
er switches to low speed and the high stage gas valve
closes 5 seconds after the main burners light. If call is
for high stage heat, induced draft blower remains at
high speed and high stage gas valve remains open.
If a single stage thermostat is used, the control
will step to low stage after the main burners light and
remain at low stage for 5 or 10 minutes, depending on
jumper position. If the call for HEAT remains after the
transition delay time expires, the control will transition
from low stage to high stage.
6. The 30-second HEAT FAN ON delay time begins after
the main burners light.
7. The unit delivers heat to the conditioned space until
the
8.
continues operation for a 30-second post-purge.
9. -
the 30-second post purge.
10. Ignition control begins timing the HEAT FAN OFF
delay. There is an adjustable HEAT FAN OFF delay
call for heat is removed, the blower will operate for 30
seconds at high heat speed then switch to low heat
speed for the remainder of the selected HEAT FAN
OFF delay.
14
1. Thermostat calls for low or high stage cooling.
2. If the thermostat call is for low stage cooling, the com-
pressor and outdoor fan are energized at low stage. If
the thermostat call is for high stage cooling, the com-
pressor and outdoor fan are energized at high stage.
3. The indoor blower will energize approximately 6 sec-
onds later.
4. The unit delivers cooling to the conditioned space until
5. The compressor and outdoor fan will be de-energized
when the thermostat opens.
6. The indoor blower continues to run at low cool speed
for approximately 60 seconds after the thermostat
indoor coil to be transferred to the conditioned space.
Then, the indoor blower is de-energized.
A 180-second anti-short cycle is integral to the
control and prevents recycling of the compressor.
1. Thermostat calls for FAN ONLY by energizing “G”.
2. The indoor blower is immediately energized at the low
heat speed.
3. The indoor blower is immediately de-energized once
thermostat call for FAN is removed.
This unit is equipped with an electronic ignition device to
automatically light the main burners. It also has a power
vent blower to exhaust combustion products. On new in-
stallations, or if a major component has been replaced, the
operation of the unit must be checked.
Check unit operation as outlined in the following instruc-
tions. If any sparking, odors, or unusual sounds are en-
errors, or obstructions in or near the blower motors. Duct
covers must be removed before operating unit.
The rollout protection device opens, cutting power to the
-
ly drawn into the heat exchanger. The rollout protection
device is located on the burner bracket. The reason for
elevated temperatures at the control must be determined
and repaired prior to resetting this manual reset control.
Rollout Protection
The secondary limit control is located on the top of the
blower scroll assembly. This control opens when elevated
temperatures are sensed. Elevated temperatures at the
control are normally caused by blower failure. The reason
for the opening should be determined and repaired prior to
resetting.
If the power to the unit is interrupted during the heating
cycle, it may cause the secondary limit to trip. Once the
blower compartment temperature drops below the limit reset
temperature, the limit will automatically reset.
Secondary
Control Limit
Back of Unit
1. Close the manual gas valve external to the unit.
2.
3. Set the room thermostat to its lowest possible setting.
4. Remove the heat exchanger door on the side of the
unit by removing screws.
5. This unit is equipped with an ignition device which au-
tomatically lights the main burner. DO NOT try to light
burner by any other method.
6. Move the gas control valve switch to the OFF position.
15
Do not force.
7.
8. Smell for gas, including near the ground. This is im-
portant because some types of gas are heavier than
gas, immediately follow the warnings on page 3 of this
smell is noted, move the gas control valve switch to
the ON position.
9. Replace the heat exchanger door on the side of the
unit.
10. Open the manual gas valve external to the unit.
11. Turn on the electrical power supply to the unit.
12. Set the thermostat to desired setting.
Gas supply pressure and manifold pressure with the burners
Gas inlet pressure must be checked and adjusted in accor-
dance to the type of fuel being consumed.
Inlet
Pressure
Boss
Low Fire
Regulator
Adjust
Manometer
Manometer
Hose
High Fire Regulator
Adjust Regulator
Vent
Outlet
Pressure Boss
Open to
Atmosphere
On/OffSwitch
HighFireCoil
Terminal(HI)CoaxialCoil
Terminal(M)
Common
Terminal(C)
White-Rodgers Model 36G54 Connected to Manometer
Mode
10.0
1.
Alternately, inlet gas pressure may be measured by
removing the cap from the drip leg and installing a pre-
2. Connect a water manometer or adequate gauge to the
3. Put unit into heating cycle and turn on all other gas
consuming appliances.
Natural Min. 5.0" W.C., Max. 10.0" W.C.
Propane Min. 11.0" W.C., Max. 13.0" W.C.
INLET GAS PRESSURE
Inlet Gas Pressure Must be within the Minimum and Maximum Value
Shown in Table Above.
pressure regulator adjustments, check piping size, etc.,
and/or consult with local utility.
4.
system.
5. Remove manometer hose from the outlet pressure
6. Turn inlet pressure test screw in to seal pressure port
-
drilled cap from drip leg. Reinstall original cap, sealing
with pipe thread compound.
7. Turn on electrical power and gas supply to the
system.
8. Turn on system power and energize valve.
9. Using a leak detection solution or soap suds, check
Bubbles forming indicate a leak. SHUT OFF GAS
AND FIX ALL LEAKS IMMEDIATELY.
Mode
10.0
16
1.
valve external to the furnace.
2.
3.
4. Attach a hose and manometer to the outlet pressure
boss of the valve.
5. Turn ON the gas supply.
6.
not energize the HI solenoid.
7.
Adjust manifold pressure using the Manifold Gas
Pressure table.
8.
outlet pressure regulator adjust tower and turn screw
clockwise to increase pressure, or counterclockwise to
decrease pressure.
9.
10. Remove regulator cover screw from the HI outlet pres-
sure regulator adjust tower and turn screw clockwise
to increase pressure, or counterclockwise to decrease
pressure.
11. -
tem.
12. Remove manometer hose from outlet pressure boss.
13. Turn outlet pressure test screw in to seal pressure
14. Turn on electrical power and gas supply to the sys-
tem.
15. Turn on system power and energize valve.
16. Using a leak detection solution or soap suds, check
for leaks at pressure boss screw. Bubbles forming in-
dicate a leak. SHUT OFF GAS AND FIX ALL LEAKS
IMMEDIATELY.
Mode
.
Range Nominal
Low Sta ge 1.7 - 2.3" w.c. 2.0" w.c.
High Stage 3.2 - 3.8" w.c. 3.5" w.c.
Low Sta ge 5.7 - 6.3" w.c. 6.0" w.c.
High Stage 9.7 - 10.3" w.c. 10.0" w.c.
Gas
Manifold Gas Pressure
Natural
Propane
For Natural gas to LP gas conversion, Conversion
Kit “LPM-08” must be used. Consult your dealer for appro-
To measure the gas input use a gas meter and proceed as
1.
unit.
2. With the unit operating, time the smallest dial on the
meter for one complete revolution. If this is a 2 cubic
foot dial, divide the seconds by 2; if it is a 1 cubic foot
dial, use the seconds as is. This gives the seconds
per cubic foot of gas being delivered to the unit.
3. -
BIC FOOT
Natural gas with a heating value of 1000 BTU
per cubic foot and 36 seconds per cubic foot as determined
Input = 1000 x 3600 / 36 = 100,000 BTU per Hour.
4.
sure all pilot burners are operating.
Check the temperature rise through the unit by placing
thermometers in supply and return air registers as close
to the unit as possible. Thermometers must not be able to
sample temperature directly from the unit heat exchangers,
or false readings could be obtained.
1. All registers must be open; all duct dampers must be
unit operated for 15 minutes before taking readings.
2. The temperature rise must be within the range speci-
17
With a properly designed system, the proper amount of
temperature rise will normally be obtained when the unit
is operated at rated input with the recommended blower
speed.
If the correct amount of temperature rise is not obtained,
it may be necessary to change the blower speed. A high-
er blower speed will lower the temperature rise. A slower
blower speed will increase the temperature rise.
The total external static pressure must be checked on this
The total external static pressure must be checked on this
1. Using a digital manometer measure the static pres-
-
2. -
3. Add the two readings together.
4. Consult proper table for quantity of air.
If the external static pressure exceeds the minimum or
maximum allowable statics, check for closed dampers, dirty
Mode
.
Blower speeds are changed at the indoor blower. The igni-
HEAT, LOW COOL and HIGH COOL.
18
Check limit control operation after 15 minutes of operation
1. After several minutes the main burners must go OFF.
Blower will continue to run.
2. Remove air restrictions and main burners will relight
after a cool down period of a few minutes.
Adjust the thermostat setting below room temperature.
1. Main burners must go OFF.
2. Circulating Air Blower will continue to run for 90, 120,
150 or 180 seconds, depending on the setting.
1. Set the thermostat to lowest setting.
2.
3. Remove the heat exchanger door on the side of the
unit by removing screws.
4. Move the gas control valve switch to the OFF position.
Do not force.
5.
6. Replace the heat exchanger door on the unit.
7. If cooling and/or air circulation will be desired, turn
ON the electrical power.
The compressor includes components which are de-
signed to protect the compressor against abnormal
operating conditions.
Check unit charge before putting the cooling section into
full operation. The unit has a thermostatic expansion valve
metering device. To ensure the unit is properly charged
for the intended application, check the unit refrigerant
subcooling at the condenser. The refrigerant subcooling is
a function of outdoor ambient temperature and return air
temperature of the conditioned space. It is the installing
contractors responsibility to ensure the proper refrigerant
subcooling at the condenser is adjusted for each applica-
tion. As the outdoor ambient temperature rises the sub-
cooling decreases and as the outdoor ambient temperature
lowers, the subcooling increases.
a. Liquid Line Pressure = 417 PSI
b. Corresponding Temp. = 120°F
c. Thermometer on Liquid line = 109°F
To obtain the amount of subcooling, subtract 109°F from
-
tion sheet or technical information manual for the design
subcooling range for your unit.
a. Suction Pressure = 143 PSI
b. Corresponding Temp. = 50°F
c. Thermometer on Suction Line = 59°F
To obtain the degrees temperature of superheat, subtract
Superheat would fall in the ± range of allowable superheat.
from the expansion valve, locate the adjustment screw, and
-
adjustment cap. Wait a minimum of 10 minutes between ad-
using the superheat method at the compressor suction line.
To increase super heat, remove charge and to decrease
super heat, add charge. After superheat is adjusted, it is
recommended to check unit subcooling at the condenser
coil liquid line. See Design Superheat and Subcooling table
for targets on each model.
19
-
perheat & Subcooling table.
cooling and refer to Design Superheat & Subcooling table.
1. Purge gauge lines. Connect service gauge manifold
allow pressure to stabilize.
2.
and insulate for best possible reading.
3. Check subcooling and superheat. System should
have a subcooling and superheat within the range
listed on the Design Superheat and Subcooling table.
a.
superheat, then check subcooling.
To adjust superheat, turn the valve stem
clockwise to increase and counterclockwise to
decrease.
b. If subcooling is low and superheat is high, add
charge to raise subcooling then check superheat.
c.
valve superheat, then check subcooling.
d. If subcooling is high and superheat is low, adjust
the subcooling.
4. Disconnect manifold set, installation is complete.
Model Superheat
±2°F
Subcooling
±1°F
Expansion
Device
Cooling
Stage
Outdoor
Ambient
(°F )
GPGM524***41 8 5 TXV low 82
GPGM530***41 13 9TXV low 82
GPGM536***41 810 TXV low 82
GPGM542***41 9 7 TXV low 82
GPGM548***41 9 7 TXV low 82
Design Superheat & Subcool
1. Turn on the electrical power supply to the unit.
2. Place the room thermostat selector switch in the
3. Set the room thermostat to the desired temperature.
The following presents probable causes of questionable unit
operation. Refer to Diagnostic Indicator Chart for an inter-
pretation of the signal and to this section for an explanation.
Remove the control box access panel and note the number
Chart for an interpretation of the signal and to this section
for an explanation.
The ignition control is equipped with a momentary
push-button switch that can be used to display on the
-
for approximately 2 seconds. Do not hold for longer
than 4 seconds. Holding the button for 4 seconds or higher
will erase the memory! Release the switch when the LED
order of display is the most recent fault to the least recent
fault.
If the integrated ignition control in this unit encounters an
diagnostic LED. If diagnostic LED indicates an internal
fault, check power supply to unit for proper voltage, check
all fuses, circuit breakers and wiring. Disconnect electric
power, replace control.
An external lockout occurs if the integrated ignition con-
trol determines that a measurable combustion cannot be
trial for ignition, the gas valve is de-energized, 30 second
inter-purge cycle is completed, and ignition is re-attempted.
The control will repeat this routine three times if a measur-
able combustion is not established. The control will then
state.
circulator blower at the heat speed and then begin a new
-
quent attempts, the control will recycle the ignition sequence.
failed ignition attempts. The integrated control will automat-
ically reset after one hour, or it can be reset by removing
the thermostat signal or disconnecting the electrical power
-
-
ible coating on the sensor. Remove the sensor and
carefully clean with steel wool.
20
faulty limit, or a failed circulator blower can cause this
power during a heating cycle may also cause the auxil-
iary limit to open. The automatic reset secondary limit is
located on top of the circulator blower assembly.
passages, blocked or cracked heat exchanger, a failed
rollout protection device is a manual reset limit located
must be determined and corrected before resetting the
limit.
Check wiring for opens/shorts and miswiring.
A pressure switch stuck open can be caused by a faulty
pressure switch, faulty wiring, a disconnected or damaged
a faulty induced draft blower.
If the control senses an open pressure switch during the
pre-purge cycle, the induced draft blower only will be ener-
gized. If the pressure switch opens after ignition has begun
the gas valve is de-energized, the circulator blower heat
A stuck closed pressure switch can be caused by a faulty
pressure switch or faulty wiring. If the control encounters
a pressure switch stuck closed, the induced draft blower
A primary limit will open due to excessive supply air tem-
total external duct static, blower motor, blower motor speed
-
ly reset once the temperature falls below a preset level.
If a limit switch opens, the gas valve is immediately de-en-
ergized, the induced draft and air circulating blowers are
energized. The induced draft and air circulator blowers
remain energized until the limit switch re-closes. The diag-
combustion and air circulator blowers are energized. The
times to indicate this condition. The control can be reset by
removing the power supply to the unit or it will automatically
reset after one hour. Miswiring is the probable cause for this
fault.
Under some conditions, the fuel or air supply can create a
amber diagnostic LED. The unit will continue to operate
The automatic ignition control has a built-in feature that
prevents damage to the compressor in short cycling situ-
ations. In the event of intermittent power losses or inter-
mittent thermostat operation, the ignition control will delay
output to the compressor contactor for three minutes from
the time power is restored or thermostat call for cooling is
compressor contactor output is being delayed.
Some models include a high pressure cutout switch and/
or a loss of charge cutout switch. The high pressure cutout
switch protects the refrigeration system from excessive
operating pressures. The loss of charge cutout switch
protects the refrigeration system from very low operating
pressures due to a loss of refrigerant. Compressor oper-
ation will be disabled if either of these devices opens. If
times to indicate that a refrigeration system pressure switch
is open.
Table of contents
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