Goodman Mfg IO 395 User Manual

INSTALLATION INSTRUCTIONS  
FOR SELF-CONTAINED PACKAGE  
AIR CONDITIONERS AND HEAT PUMP UNITS  
GPC/GPH 13 SEER “M” SERIES  
WITH R-410A  
®
US  
C
RECOGNIZE THIS SYMBOL AS A SAFETY PRECAUTION.  
ATTENTION INSTALLING PERSONNEL  
Prior to installation, thoroughly familiarize yourself with this Installation Manual. Observe all safety warnings. During  
installation 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  
installation of self contained package air conditioners  
and heating units. See the Specification Sheets  
applicable to your model for information regarding  
accessories.  
*NOTE: Please contact your distributor or our  
website for the applicable Specification Sheets  
referred to in this manual.  
Goodman Manufacturing Company, L.P.  
5151 San Felipe, Suite 500, Houston, TX 77056  
IO-395  
8/10  
© 2010 Goodman Manufacturing Company, L.P.  
“Product Registration” located on the left side of the Warranty  
page and complete the forms in the manner indicated on the  
Product Registration page.  
WARNING  
HIGH VOLTAGE!  
DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING  
THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE  
TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR  
DEATH.  
Product limited warranty certificates for models currently in  
model is not currently in production or does not appear on the  
website, please contact your installing contractor or contact  
customer service (877-254-4729) to obtain a copy of your  
warranty certificate.  
WARNING  
Each product overview page contains a Product Warranty link;  
by clicking on it you will be able to view the limited warranty  
coverage for that specific product. To view warranty registration  
information, click on the Product Warranty text on the left  
navigation panel on the home page of each website. The Online  
Product Registration pages are located in this same section.  
CONNECTING UNIT DUCT WORK TO UNAUTHORIZED HEAT PRODUCING DEVICES  
SUCH AS A FIREPLACE INSERT, STOVE, ETC. MAY RESULT IN PROPERTY  
DAMAGE, FIRE, CARBON MONOXIDE POISONING, EXPLOSION, PERSONAL  
INJURY OR DEATH.  
WARNING  
Before using this manual, check the serial plate for proper  
model identification.  
T
HIS PRODUCT CONTAINS OR PRODUCES A CHEMICAL OR CHEMICALS WHICH  
MAY CAUSE SERIOUS ILLNESS OR DEATH AND WHICH ARE KNOWN TO THE  
STATE OF CALIFORNIA TO CAUSE CANCER, BIRTH DEFECTS OR OTHER  
REPRODUCTIVE HARM.  
The installation and servicing of this equipment must be  
performed by qualified, experienced technicians only.  
SHIPPING INSPECTION  
WARNING  
Upon receiving the unit, inspect it for damage from shipment.  
Claims for damage, either shipping or concealed, should be filed  
immediately with the shipping company. Check the unit model  
number, specifications, electrical characteristics and accessories  
to determine if they are correct. In the event an incorrect unit is  
shipped, it must be returned to the supplier and must NOT be  
installed. The manufacturer assumes no responsibility for instal-  
lation of incorrectly shipped units.  
TO AVOID PROPERTY DAMAGE, PERSONAL INJURY OR DEATH, DO NOT USE  
THIS UNIT IF ANY PART HAS BEEN UNDER WATER. IMMEDIATELY CALL A  
QUALIFIED SERVICE TECHNICIAN TO INSPECT THE FURNACE AND TO REPLACE  
ANY PART OF THE CONTROL SYSTEM AND ANY GAS CONTROL HAVING BEEN  
UNDER WATER.  
REPLACEMENT PARTS  
ORDERING PARTS  
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 yellow page  
section of the local telephone book or contact:  
WARNING  
TO PREVENT THE RISK OF PROPERTY DAMAGE, PERSONAL INJURY, OR DEATH,  
DO NOT STORE COMBUSTIBLE MATERIALS OR USE GASOLINE OR OTHER  
FLAMMABLE LIQUIDS OR VAPORS IN THE VICINITY OF THIS APPLIANCE.  
CONSUMERAFFAIRS  
GOODMAN MANUFACTURING COMPANY, L.P.  
7401 SECURITY WAY  
HOUSTON, TEXAS 77040  
CODES AND REGULATIONS  
877-254-4729  
The GPC/GPH M-series air conditioners and heat pumps are de-  
signed for OUTDOOR USE ONLY. GPH M-Series is available in  
cooling capacities of 2, 2-1/2, 3, 3-1/2, 4 and 5 nominal tons of  
cooling. GPC M-Series is available in cooling capacities of 3, 4  
and 5 nominal tons of cooling. Optional field installed heat kits are  
available in 5,8,10,15 and 20 kW. 3 phase heat kits are available  
only in 15 and 20 kW. The units can be easily installed in manufac-  
tured or modular homes with existing high-static duct work. The  
units can also be easily converted to accommodate a plenum for  
normal or low-static applications. The GPC/GPH M-series are self  
contained packaged units so the only connections needed for in-  
stallation are the supply and return ducts, the line and low voltage  
wiring and drain connection. The units are ETL listed and AHRI  
certified.  
SAFETY INSTRUCTIONS  
The following symbols and labels are used throughout this manual  
to indicate immediate or potential safety hazards. It is the owner’s  
and installer’s responsibility to read and comply with all safety  
information and instructions accompanying these symbols. Fail-  
ure to heed safety information increases the risk of personal injury,  
property damage, and/or product damage.  
WARNING  
DO NOT CONNECT TO OR USE ANY DEVICE THAT IS NOT DESIGN-CERTIFIED  
BY GOODMAN FOR USE WITH THIS UNIT. SERIOUS PROPERTY DAMAGE,  
PERSONAL INJURY, REDUCED UNIT PERFORMANCE AND/OR HAZARDOUS  
CONDITIONS MAY RESULT FROM THE USE OF SUCH NON-APPROVED DEVICES.  
3
Allow 18” minimum for service access to the compressor com-  
partment and controls. The top of the unit should be completely  
unobstructed. If units are to be located under an overhang, there  
should be a minimum of 36” clearance and provisions made to  
deflect the warm discharge air out from the overhang.  
The information on the rating plate is in compliance with the FTC  
& DOE rating for single phase units. The three phase units in  
this series are not covered under the DOE certified program. The  
efficiency ratings of these units are a product of thermal effi-  
ciency determined under continuous operating conditions inde-  
pendent of any installed system.  
UNIT LOCATION  
Consider the affect of outdoor fan noise on conditioned space and  
any adjacent occupied space. It is recommended that the unit be  
placed so that condenser air discharge does not blow toward  
windows less than 25 feet away. Consideration should also be  
given to shade and unit appearance.  
Heat pumps require special location consideration in areas of heavy  
snow accumulation and/or areas with prolonged continuous sub-  
freezing temperatures. Heat pump unit bases have holes under the  
outdoor coil to permit drainage of defrost water accumulation. The  
unit must be situated to permit free unobstructed drainage of the  
defrost water and ice. A minimum 2" clearance under the outdoor  
coil is required in the milder climates.  
EPAREGULATIONS  
IMPORTANT: THE UNITED STATES ENVIRONMENTAL PROTECTION  
AGENCY (EPA) HAS ISSUED VARIOUS REGULATIONS REGARDING  
THE INTRODUCTION AND DISPOSAL OF REFRIGERANTS IN THIS UNIT.  
FAILURE TO FOLLOW THESE REGULATIONS MAY HARM THE  
ENVIRONMENT AND CAN LEAD TO THE IMPOSITION OF SUBSTANTIAL  
FINES. BECAUSE REGULATIONS MAY VARY DUE TO PASSAGE OF  
NEW LAWS, WE SUGGEST A CERTIFIED TECHNICIAN PERFORM ANY  
WORK DONE ON THIS UNIT. SHOULD YOU HAVE ANY QUESTIONS  
PLEASE CONTACT THE LOCAL OFFICE OF THE EPA.  
GROUND LEVEL PRE-INSTALLATION DETAILS  
NATIONAL CODES  
The unit should be set on a solid, level foundation - preferably a  
concrete slab at least 4 inches thick. The slab should be above  
ground level and surrounded by a graveled area for good drainage.  
Any slab used as a unit’s foundation should not adjoin the building  
as it is possible that sound and vibration may be transmitted to the  
structure.  
This product is designed and manufactured to permit installation  
in accordance with National Codes. It is the installer’s responsi-  
bility to install the product in accordance with National Codes and/  
or prevailing local codes and regulations.  
MAJOR COMPONENTS  
The unit includes a hermetically sealed refrigerating system (con-  
sisting of a compressor, condenser coil, evaporator coil with  
flowrator), an indoor blower, a condenser fan and all necessary  
internal electrical wiring. The heat pump also includes a revers-  
ing valve, solenoid, defrost thermostat and control and loss of  
charge protection. The system is factory-evacuated, charged and  
performance tested. Refrigerant amount and type are indicated  
on rating plate.  
PRE-INSTALLATION CHECKS  
Before attempting any installation, the following points should  
be considered:  
Structural strength of supporting members  
Clearances and provision for servicing  
Power supply and wiring  
Air duct connections  
Drain facilities and connections  
GroundLevelInstallation  
Location may be on any four sides of a home,  
manufactured or modular, to minimize noise  
ROOF TOP PRE-INSTALLATION DETAILS  
CLEARANCES AND ACCESSIBILITY  
Ensure that the roof is weather tight and allows proper drainage of  
condensation. Use steel or treated wood beams as unit support  
for load distribution.  
The unit is designed to be located outside the building with un-  
obstructed condenser air inlet and discharge. Additionally, the  
unit must be situated to permit access for service and installa-  
tion. Condenser air enters from three sides. Air discharges  
upward from the top of the unit. Refrigerant gauge connections  
are made on the right side of the unit as you face the compressor  
compartment. Electrical connections can be made either on the  
right, bottom or duct panel side of the unit. The best and most  
common application is for the unit to be located 10” from wall (4”  
minimum) with the connection side facing the wall. This “close  
to the wall” application minimizes exposed wiring.  
NOTE: To ensure proper condensate drainage, unit must be in-  
stalled in a level position.  
To avoid possible property damage or personal injury, the  
roof must have sufficient structural strength to carry the  
weight of the unit(s) and snow or water loads as required  
by local codes. Consult a structural engineer to determine  
the weight capabilities of the roof.  
The unit may be installed directly on wood floors or on  
Class A, Class B, or Class C roof covering material.  
To avoid possible personal injury, a safe, flat surface for  
service personnel should be provided.  
Close to the wall application assures free, unobstructed air to  
the other two sides. In more confined application spaces, such  
as corners provide a minimum 10” clearance on all air inlet sides.  
4
RIGGING DETAILS  
WARNING  
TO PREVENT PROPERTY DAMAGE, THE UNIT SHOULD REMAIN IN AN UPRIGHT  
POSITION DURING ALL RIGGING AND MOVING OPERATIONS. TO FACILITATE  
LIFTING AND MOVING WHEN A CRANE IS USED, PLACE THE UNIT IN AN  
ADEQUATE CABLE SLING.  
WARNING  
TO AVOID POSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH,  
ENSURE THE ROOF HAS SUFFICIENT STRUCTURAL STRENGTH TO CARRY THE  
WEIGHT OF THE UNIT(S), ROOF CURB, SNOW LOADS, AND WATER LOADS AS  
REQUIRED BY LOCAL CODES. CONSULT A STRUCTURAL ENGINEER TO  
DETERMINE THE WEIGHT CAPABILITIES OF THE ROOF.  
CAUTION  
TO AVOID POSSIBLE PERSONAL INJURY, A SAFE, FLAT SURFACE FOR SERVICE  
PERSONNEL SHOULD BE PROVIDED.  
IMPORTANT: If using bottom discharge with roof curb, duct work  
should be attached to the curb prior to installing the unit.  
Lower unit carefully onto roof mounting curb. While rigging unit,  
center of gravity will cause condenser end to be lower than supply  
air end.  
RooftopInstallation  
ROOF CURB INSTALLATIONS ONLY  
NOTE: Sufficient structural support must be determined prior to  
locating and mounting the curb and package unit.  
Curb insulation, cant strips, flashing and general roofing material  
are furnished by the contractor.  
Curbing must be installed in compliance with the National Roofing  
Contractors Association Manual. Construct duct work using current  
industry guidelines. The duct work must be placed into the roof  
curb before mounting the package unit.  
Rigging  
CIRCULATING AIR AND FILTERS  
AIRFLOW CONVERSION  
Units can easily be converted from horizontal to down-discharge  
airflow delivery. In down-discharge or high static 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 air flow.  
Horizontal Air Flow (Applies to 3 phase models)  
Single phase models are shipped without horizontal duct  
covers. If needed, these kits may be ordered through  
Goodman’s Service Parts department.  
RoofCurbInstallation  
5
FILTERS  
CAUTION  
TO PREVENT PROPERTY DAMAGE DUE TO FIRE AND LOSS OF  
EQUIPMENT EFFICIENCY OR EQUIPMENT DAMAGE DUE TO DUST AND LINT  
BUILD UP ON INTERNAL PARTS, NEVER OPERATE UNIT WITHOUT AN AIR  
FILTER INSTALLED IN THE RETURN AIR SYSTEM.  
Filters are not provided with unit and must be supplied and exter-  
nally installed in the return duct system by the installer. An optional  
factory approved internal filter rack may also be used. A field-in-  
stalled filter grille is recommended for easy and convenient ac-  
cess to the filters for periodic inspection and cleaning. When  
installing filters, ensure the air flow arrows on the filter are pointing  
toward the circulator blower.  
Remove these covers  
for horizontal duct  
applications  
Refer to the unit filter size chart below for filter size information.  
MINIMUM FILTER SIZE  
NOMINAL SIZE (INCHES)  
NOMINAL AREA (SQ. FT.)  
10x20  
14x20  
14x25  
15x20  
16x20  
16x25  
20x20  
20x25  
25x25  
1.4  
1.9  
2.4  
2.1  
2.2  
2.8  
2.8  
3.5  
4.3  
Return  
Supply  
Remove these panels  
for downflow duct  
applications  
NOTE: Filters must have adequate face area for the rated quantity  
of the unit. See the air delivery table below for recommended filter  
size. Size the filters in accordance with their manufacturer recom-  
mendations. Throwaway filters must be sized for a maximum face  
velocity of 300 feet per minute.  
DuctCoverInstallation  
DownDischargeApplications  
Cut insulation around bottom openings and remove panels from  
the bottom of the unit, saving the screws holding the panels in  
place.  
7
NOTE: Single phase models require installation of horizontal duct  
kit #20464501PDGK (medium chassis) and #20464502PDGK  
(large chassis).  
6
5
4
3
2
DUCT WORK  
Duct systems and register sizes must be properly designed for  
the C.F.M. and external static pressure rating of the unit. Duct work  
should be designed in accordance with the recommended methods  
of Air Conditioning Contractors of America Manual D (Residential)  
or Manual Q (Commercial). All ductwork exposed to the outdoors  
must include a 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, WarmAir Heating and Ventilating Systems. Pamphlets  
No. 90A and 90B.  
The supply duct from the unit through a wall may be installed  
without clearance. However, minimum unit clearances 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.  
For duct flange dimensions on the unit refer to the Unit Dimension  
illustration in the appendix.  
For down-discharge applications, the ductwork should be attached  
to the roof curb prior to installing the unit. Duct work dimensions are  
shown in the roof curb installation manual.  
If desired, supply and return duct connections to the unit may be  
made with flexible connections to reduce possible unit operating  
sound transmission.  
500  
1000 1500 2000 2500 3000 3500  
Airflow - SCFM  
PIPING  
CONDENSATE DRAIN  
The condensate drain connection of the evaporator is a half cou-  
pling of ¾” N.P.T. A trap must be provided to have Proper conden-  
sate drainage.  
2" Minimum  
Unit  
Drain  
Connection  
3" Minimum  
Flexible  
Tubing-Hose  
Or Pipe  
A Positive Liquid Seal  
Is Required  
Install condensate drain trap as shown. Use ¾ “ drain connection  
size or larger. Do not operate without trap. Unit must be level or  
slightly inclined toward drain.  
6
WIRING  
NOTE: All wiring should be made in accordance with the National  
Electrical Code.  
Consult your local Power Company to determine the availability of  
sufficient power to operate the unit. Check the voltage, frequency,  
and phase at the power supply to ensure it corresponds to the unit’s  
RATED VOLTAGE REQUIREMENT.  
In accordance with the N.E.C. or local codes, install a branch cir-  
cuit fused disconnect near the unit. Determine wire sizes and  
overcurrent protection from the unit nameplate ampacity and in  
accordance with the Minimum Filter Size or the N.E.C. The wiring  
should never be sized smaller than is recommended by either of  
these two sources.  
HIGH VOLTAGE WIRING  
Single Phase- Two leads should be connected to terminals  
L1 & L2 in the electrical control section, using wire sizes  
specified in wiring table.  
Fuses smaller than that recommended on the rating plate could  
result in unnecessary fuse failure or service calls. The use of  
protective devices of larger size than indicated could result in ex-  
tensive damage to the equipment. The manufacturer bears no  
responsibility for damage caused to equipment as result of the  
use of larger than is recommended size protective devices.  
Three Phase- Three leads should be connected to  
terminals L1, L2 and L3 in the electrical section, using  
wire sizes specified in wiring table.  
LOW VOLTAGE WIRING  
Air Conditioners- Connect 24V wires from the thermostat  
to the corresponding wires in the control box using No. 18  
AWG as follows:  
All units have undergone a run test prior to packaging for ship-  
ment. This equipment has been started at minimum rated voltage  
and checked for satisfactory operation. Do not attempt to operate  
this unit if the voltage is not within the minimum and maximum  
voltages shown on nameplate.  
LEAD  
Red  
THERMOSTAT  
R (24V)  
All exterior wiring must be within approved weatherproof conduit.  
The unit must be permanently grounded in accordance with local  
codes, or in absence of local codes, with N.E.C ANSI/ NFPA NO.  
70-1984 or latest edition by using ground lug in the control box.  
Green  
Yellow  
White  
Brown  
G (Fan)  
Y (Cool)  
W1 (Heat)*  
W2 (Heat)*  
Fuses or HACR type circuit breakers may be used where codes  
permit.  
Heat Pumps- Connect 24V wires from the thermostat to  
the corresponding wires in the control box using No. 18  
AWG as follows:  
FOR INTERNAL WIRING SEE WIRING LABEL ATTACHED TO UNIT  
G
TERMINAL THERMOSTAT  
See  
Red  
Green  
Orange  
White  
Brown  
Yellow  
C (Blue)  
R (24V)  
G (Fan)  
O (Rev. Valve)  
W1 (Heat, 2nd)*  
W2 (Heat 3rd)*  
Y (Cool)  
*NOTE  
C (Common)  
G
*Optional field installed heat connections  
*NOTE: LOW VOLTAGE CONNECTORS do not apply to heat pumps with  
electric heat. LOW VOLTAGE CONNECTORS apply ONLY to GPC units  
with electric heat.  
INTERNAL WIRING  
A diagram detailing the internal wiring of this unit is located on the  
electrical box cover. If any of the original wire supplied with the ap-  
pliance must be replaced, the wire gauge and insulation must be  
the same as the original wiring.  
Transformer is wired for 230 volts on the 208/230 models. See wir-  
ing diagram for 208 volt wiring.  
IMPORTANT NOTE: Some single phase units are equipped with a  
single-pole contactor. Exercise caution when servicing as only one  
leg of the power supply is broken with the contractor.  
To wire the unit, make the following high and low voltage connec-  
tions.  
1. For branch circuit wiring (main power supply to unit  
disconnect), the minimum wire size for the length of run  
can be determined using the circuit ampacity found on the  
unit rating plate and the table below. From the unit  
disconnect to unit, the smallest wire size allowable may be  
used for the ampacity, as the Disconnect must be in sight  
of the unit.  
7
3. Slowly raise the heating temperature setting. When the  
heating first stage makes contact, stop raising the  
temperature setting.. The compressor, blower and fan  
should now be running with the reversing valve in the de-  
energized (heating) position. After giving the unit time to  
settle out, make sure the unit is supplying heated air.  
BRANCH CIRCUIT AMPACITY  
15 20 25 30 35 40 45 50  
SUPPLY WIRE LENGTH -  
FEET  
200  
6
8
4
6
8
4
6
8
4
4
6
3
4
6
8
3
4
6
8
2
3
4
6
2
3
4
6
150  
100  
50  
10  
4. If the outdoor ambient is above 80°F, the unit may trip on its  
high pressure cut out when on heating. The compressor  
should stop. The heating cycle must be thoroughly  
checked, so postpone the test to another day when  
conditions are more suitable. DO NOT FAIL TO TEST.  
14 12 10 10  
2. Wire size based on 60° C rated wire insulation and 30° C  
Ambient Temperature (86° F).  
3. For more than 3 conductors in a raceway or cable, see the  
N.E.C. for derating the ampacity of each conductor.  
5. If the outdoor ambient is low and the unit operates properly  
on the heating cycle, you may check the pressure cutout  
operation by blocking off the indoor return air until the unit  
trips.  
STARTUP, ADJUSTMENTS, AND CHECKS  
6. If unit operates properly in the heating cycle, raise the  
temperature setting until the heating second stage makes  
contact. Supplemental resistance heat, if installed should  
now come on. Make sure it operates properly.  
WARNING  
HIGH VOLTAGE!  
DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING  
THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE  
TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR  
DEATH.  
NOTE: If outdoor thermostats are installed, the outdoor  
ambient must be below the set point of these thermostats  
for the heaters to operate. It may be necessary to jumper  
these thermostats to check heater operation if outdoor  
ambient is mild.  
START-UP PROCEDURE AND CHECKLIST  
7. For thermostats with emergency heat switch, return to step  
6. The emergency heat switch is located at the bottom of  
the thermostat. Move the switch to emergency heat. The  
heat pump will stop, the blower will continue to run, all  
heaters will come on and the thermostat emergency heat  
light will come on. 3-phase models are single stage heat  
only.  
With power turned off at all disconnects:  
1. Turn thermostat system switch to “COOL” and fan switch  
to “AUTO”. Next, turn the temperature setting as high as it  
will go.  
2. Inspect all registers and set them to the normal open  
position.  
8. If checking the unit in the wintertime, when the outdoor coil  
is cold enough to actuate the defrost control, observe at  
least one defrost cycle to make sure the unit defrosts  
completely.  
3. Turn on the electrical supply at the disconnect.  
4. Turn the fan switch to the “ON” position. The blower should  
operate after a 7-second delay.  
5. Turn the fan switch to “AUTO” position. The blower should  
stop after a 65-second delay.  
FINAL SYSTEM CHECKS  
1. Check to see if all supply and return air grilles are adjusted  
and the air distribution system is balanced for the best  
compromise between heating and cooling.  
6. Slowly lower the cooling temperature until the unit starts.  
The compressor, blower and fan should now be operating.  
Allow the unit to run 10 minutes, make sure cool air is being  
supplied by the unit.  
2. Check for air leaks in the ductwork.  
7. Turn the temperature setting to the highest position,  
stopping the unit. The indoor blower will continue to run for  
65-seconds.  
3. See Sections on Air Flow Measurement and Adjustment  
and Checking Charge.  
4. Make sure the unit is free of “rattles”, and the tubing in the  
unit is free from excessive vibration. Also make sure tubes  
or lines are not rubbing against each other or sheet metal  
surfaces or edges. If so, correct the trouble.  
8. Turn the thermostat system switch to “OFF” and disconnect  
all power when servicing the unit.  
HEAT PUMP START-UP PROCEDURE  
5. Set the thermostat at the appropriate setting for cooling  
and heating or automatic changeover for normal use.  
1. Check the cooling mode for the heat pump in the same  
manner as above. The reversing valve is energized when  
the thermostat is placed in the cooling position. A clicking  
sound should be noticeable from the reversing valve. By  
lowering the temperature setting to call for cooling, the  
contractor is energized. The compressor, blower and fan  
should then be running. After the cooling mode is checked  
out, turn the thermostat system switch to “OFF”.  
6. Be sure the Owner is instructed on the unit operation,  
filter, servicing, correct thermostat operation, etc.  
The foregoing “Start-up Procedure and Check List” is recom-  
mended to serve as an indication that the unit will operate nor-  
mally.  
COMPONENTS  
2. Turn the thermostat system switch to “HEAT” and fan switch  
Contactor  
to “AUTO”.  
This control is activated (closed) by the room thermostat for both  
heating and cooling. The contactor has a 24V coil and supplies  
power to the compressor and outdoor fan motor.  
8
Crankcase Heater  
HEATING CYCLE  
This item is “ON” whenever power is supplied to the unit and the  
crankcase heater thermostat is closed. Crankcase heater  
thermostat closes at 67° and opens at 85°. It warms the compressor  
crankcase thereby preventing liquid migration and subsequent  
compressor damage. The insert type heater is self regulating. It is  
connected electrically to the contactor L1 and L2 terminals.  
The heat pump operates in the heating cycle by redirecting refrig-  
erant flow through the refrigerant circuit external to the compres-  
sor. This is accomplished with through the reversing valve. Hot  
discharge vapor from the compressor is directed to the indoor coil  
(evaporator on the cooling cycle) where the heat is removed, and  
the vapor condenses to liquid. It then goes through the expansion  
device to the outdoor coil (condenser on the cooling cycle) where  
the liquid is evaporated, and the vapor goes to the compressor.  
Condenser Motor  
This item is activated by the contactor during heating and cooling,  
except during defrost and emergency heat operation.  
Compressor  
COOLING  
SERVICE PORT  
REVERSING VALVE  
This item is activated by the contactor for heating and cooling,  
except during emergency heat. It is protected by an internal over-  
load.  
SERVICE VALVE  
Contactor Relay  
SERVICE PORT  
ACCUMULATOR  
This control is activated by the thermostat (24V coil) and supplies  
power to the contactor.  
Defrost Control  
COMPRESSOR  
DISTRIBUTOR  
The Defrost control provides time/temperature initiation and termi-  
nation of the defrost cycle. When a Defrost cycle is initiated, the  
defrost control shifts the reversing valve to “COOLING” mode, stops  
the outdoor fan and brings on supplemental heat. Normally, a  
Defrost cycle will take only 2-3 minutes unless system is low on  
charge or outdoor conditions are severe. (windy and cold). The  
defrost control also provides for a 3 minute off cycle compressor  
delay.  
EXPANSION DEVICE  
SERVICE PORT  
CHECK VALVE  
ORIFICE  
CHECK VALVE  
ORIFICE  
INDOOR  
COIL  
SERVICE  
VALVE  
OUTDOOR  
COIL  
Outdoor Thermostat  
HEATING  
These optional controls are used to prevent full electric heater  
operation at varying outdoor ambient (0° F-to 45° F). They are nor-  
mally open above their set points and closed below to permit stag-  
ing of indoor supplement heater operation. If the outdoor ambient  
temperature is below 0° F (-18° C) with 50% or higher RH, an  
outdoor thermostat (OT) must be installed and set at (0°) on the  
dial. Failure to comply with this requirement may result in damage  
to the product which may not be covered by the manufacturer’s  
warranty.  
SERVICE PORT  
REVERSING VALVE  
SERVICE VALVE  
ACCUMULATOR  
COMPRESSOR  
DISTRIBUTOR  
Reversing Valve Coil  
This coil is activated by the thermostat, in the cooling mode and  
during defrost. It positions the reversing valve pilot valve for cooling  
operation.  
DISTRIBUTOR  
SERVICE PORT  
Indoor Blower Motor  
CHECK VALVE  
ORIFICE  
CHECK VALVE  
ORIFICE  
This is activated by the room thermostat by COOLING or FAN ON  
position. The motor is energized through the EBTDR for PSC mo-  
tors and directly by the room thermostat for X-13 motors (4 or 5 Ton  
units). X-13 motors are constant torque motors with very low power  
consumption. This motor is energized by a 24V signal from the  
thermostat. (See Air Flow Measurement and Adjustment for speed  
adjustment instructions).  
Blower Interlock Relay (Single Phase PSC Models Only)  
This relay is used to energize the blower during the electric heat  
operation. Some room thermostats do not energize the motor dur-  
ing electric heat. This relay insures blower operation when the  
room thermostat energizes heat. This relay has a 240 volt coil and  
an 8 amp contact relay. This relay is energized by the electric heat  
kit sequencer.  
INDOOR  
COIL  
SERVICE  
VALVE  
OUTDOOR  
COIL  
When the solenoid valve coil is operated either from heating to  
cooling or vice versa, the piston in the reversing valve to the low  
pressure (high pressure) reverse positions in the reversing valve.  
The following figures show a schematic of a heat pump on the cool-  
ing cycle and the heating cycle. In addition to a reversing valve, a  
heat pump is equipped with an expansion device and check valve  
for the indoor coil, and similar equipment for the outdoor coil. It is  
also provided with a defrost control system.  
The expansion devices are flowrator distributors and perform the  
same function on the heating cycle as on the cooling cycle. The  
flowrator distributors also act as check valves to allow for the re-  
verse of refrigerant flow.  
When the heat pump is on the heating cycle, the outdoor coil is  
functioning as an evaporator. The temperature of the refrigerant in  
the outdoor coil must be below the temperature of the outdoor air  
in order to extract heat from the air. Thus, the greater the difference  
in the outdoor temperature and the outdoor coil temperature, the  
greater the heating capacity of the heat pump. This phenomenon  
is a characteristic of a heat pump. It is a good practice to provide  
HEAT PUMP OPERATION  
COOLING CYCLE  
When the heat pump is in the cooling cycle, it operates exactly as  
a Summer Air Conditioner unit. In this mode, all the charts and  
data for service that apply to summer air conditioning apply to the  
heat pump. Most apply on the heating cycle except that “condenser”  
becomes “evaporator”, “evaporator” becomes “condenser”, “cool-  
ing” becomes “heating”.  
9
supplementary heat for all heat pump installations in areas where  
the temperature drops below 45° F. It is also a good practice to  
provide sufficient supplementary heat to handle the entire heating  
requirement should there be a component failure of the heat pump,  
such as a compressor, or refrigerant leak, etc.  
Since the temperature of the refrigerant in the outdoor coil on the  
heating cycle is generally below freezing point, frost forms on the  
surfaces of the outdoor coil under certain weather conditions of  
temperature and relative humidity. Therefore, it is necessary to  
reverse the flow of the refrigerant to provide hot gas in the outdoor  
coil to melt the frost accumulation. This is accomplished by re-  
versing the heat pump to the cooling cycle. At the same time, the  
outdoor fan stops to hasten the temperature rise of the outdoor  
coil and lessen the time required for defrosting. The indoor blower  
continues to run and the supplementary heaters are energized.  
4. Disconnect outdoor fan by removing the outdoor fan motor  
wire from “DF2” on defrost control.  
5. Restart unit and allow frost to accumulate.  
6. After a few minutes of operation, the unit’s defrost  
thermostat should close. To verify this, check for 24 volts  
between “DFT” and “C” on board. If the temperature at the  
thermostat is less than 28° F and the thermostat is open,  
replace the unit’s defrost thermostat, as it is defective.  
7. When the unit’s defrost thermostat has closed, short the  
test pins on the defrost board until the reversing valve  
shifts, indicating defrost. This should take up to 21  
seconds depending on what timing period the control is  
set on. After defrost initiation, the short must instantly be  
removed or the unit’s defrost period will only last 2.3  
seconds.  
8. The control is shipped from the factory with the compressor  
delay option selected. This will de-energize the  
compressor contactor for 30 seconds on defrost initiation  
and defrost termination. If the jumper is set to Normal, the  
compressor will continue to run during defrost initiation  
and defrost termination. The control will also ignore the  
low pressure switch connected to R-PS1 and PS2 for 5  
minutes upon defrost initiation and 5 minutes after defrost  
termination.  
DEFROST CONTROL  
During operation the power to the circuit board is controlled by a  
temperature sensor, which is clamped to a feeder tube entering  
the outdoor coil. Defrost timing periods of 30,60 and 90 minutes  
may be selected by setting the circuit board jumper to 30, 60 and  
90 respectively. Accumulation of time for the timing period selected  
starts when the sensor closes (approximately 31° F), and when  
the wall thermostat calls for heat. At the end of the timing period,  
the unit’s defrost cycle will be initiated provided the sensor re-  
mains closed. When the sensor opens (approximately 75° F), the  
defrost cycle is terminated and the timing period is reset. If the  
defrost cycle is not terminated due to the sensor temperature, a  
twelve minute override interrupts the unit’s defrost period.  
9. After the unit’s defrost thermostat has terminated, check  
the defrost thermostat for 24 volts between “DFT” and “C”.  
The reading should indicate 0 volts (open sensor).  
10.Shut off power to unit.  
11. Replace outdoor fan motor lead to terminal “DF2” on defrost  
board and turn on power.  
AIRFLOW MEASUREMENT AND ADJUSTMENT  
After reviewing Duct Work section, proceed with airflow measure-  
ments and adjustments. The unit blower curves (see Specifica-  
tion Sheets) are based on external static pressure (ESP per in/wc).  
The duct openings on the unit are considered internal static pres-  
sure. As long as ESP is maintained, the unit will deliver the proper  
air up to the maximum static pressure listed for the CFM required  
by the application (i.e. home, building, etc.)  
In general, 400 CFM per ton of cooling capacity is a rule of thumb.  
Some applications depending on the sensible and latent capacity  
requirements may need only 350 CFM or up to 425 CFM per ton.  
Check condition space load requirements (from load calculations)  
and equipment expanded ratings data to match CFM and capacity.  
After unit is set and duct work completed, verify the ESP with a  
1-inch inclined manometer with pitot tubes or a Magnahelic gauge  
and confirm CFM to blower curves in the Specification Sheets. All  
units have three-speed blower motors. If low speed is not utilized,  
the speed tap can be changed to medium or high speed.  
NOTE: Never run CFM below 350 CFM per ton, evaporator freezing  
or poor unit performance is possible.  
SUGGESTED FIELD TESTING/TROUBLE SHOOTING  
1. Run unit in the heating mode (room thermostat calling for  
heat).  
2. Check unit for proper charge. Note: Bands of frost on the  
condenser coil indicate low refrigerant charge.  
3. Shut off power to unit.  
10  
E.S.P (In. o f H2O)  
M odel  
Speed  
Volts  
CFM  
0.1  
0.2  
0.3  
0.4  
0.5  
0.6  
0.7  
0.8  
1122  
338  
1078  
330  
1032  
321  
972  
310  
915  
300  
804  
283  
687  
264  
935  
363  
1055  
442  
558  
250  
748  
330  
939  
LOW  
MED  
230  
230  
230  
230  
230  
230  
230  
230  
230  
WATTS  
CFM  
1387  
456  
1331  
440  
1264  
428  
1209  
412  
1119  
399  
1041  
382  
WATTS  
CFM  
1521  
534  
1454  
521  
1388  
510  
1311  
490  
1230  
477  
1144  
461  
HIGH  
WATTS  
CFM  
420  
1,140 1,395 1,360 1,310 1,265 1,235 1,190  
275 285 295 315 325 335 345  
1,795 1,765 1,715 1,695 1,650 1,600 1,500  
475 490 505 520 530 535 510  
1,860 1,820 1,785 1,745 1,700 1,625 1,515  
515 530 545 565 570 550 535  
1,755 1,720 1,685 1,645 1,615 1,570 1,530  
420 435 455 460 475 490 500  
1,850 1,820 1,775 1,735 1,705 1,675 1,610  
480 500 515 525 535 555 545  
2,180 2,125 2,050 1,975 1,875 1,800 1,655  
1,130  
T1 (G)  
T2 / T3  
T4 / T5  
T1 (G)  
T2 / T3  
T4 / T5  
355  
1,375  
475  
WATTS  
CFM  
WATTS  
CFM  
1,395  
485  
WATTS  
CFM  
1,465  
500  
WATTS  
CFM  
1,495  
520  
WATTS  
CFM  
1,530  
540  
770  
755  
725  
700  
675  
640  
575  
WATTS  
E.S.P (In. of H2O)  
0.4 0.5  
Model  
Speed  
Volts  
NOTES:  
0.1  
667  
WATTS 153  
CFM 897  
WATTS 233  
CFM 1242  
WATTS 373  
CFM 1097  
WATTS 337  
CFM 1253  
WATTS 397  
CFM 1448  
WATTS 499  
CFM 1122  
WATTS 338  
CFM 1387  
WATTS 456  
CFM 1521  
WATTS 534  
0.2  
0.3  
0.6  
0.7  
0.8  
CFM  
596 -------- -------- -------- -------- -------- --------  
150 -------- -------- -------- -------- -------- --------  
Data shown is dry coil.  
230  
230  
230  
230  
230  
230  
230  
230  
230  
230  
230  
230  
230  
230  
230  
230  
230  
230  
230  
Low  
Med  
High  
Low  
Med  
High  
Low  
Med  
High  
HIGH  
Low  
Med  
High  
T1 (G)  
Wet coil pressure drop is  
approximately:  
841  
229  
784  
224  
713  
217  
610 -------- -------- --------  
207 -------- -------- --------  
0.1” H20, for two-row indoor  
coil;  
1181  
364  
1122  
354  
1057  
344  
982  
333  
883  
318  
818  
290  
952  
342  
1106  
427  
804  
283  
1041  
382  
1144  
461  
719  
298  
648  
271  
777  
313  
1008  
410  
687  
264  
935  
363  
1055  
442  
617  
284  
562  
257  
670  
297  
864  
382  
558  
250  
748  
330  
939  
0.2” H2O, for three-row  
indoor coil;  
1059  
330  
1016  
324  
959  
901  
315  
305  
1204  
388  
1148  
379  
1097  
369  
1033  
356  
and 0.3” H20, for four-row  
indoor coil.  
1380  
483  
1323  
472  
1258  
459  
1194  
446  
• Data shown does not include  
filter pressure drop, approx.  
0.08” H20.  
1078  
330  
1032  
321  
972  
915  
310  
300  
• ALL MODELS SHOULD RUN  
NO LESS THAN 350 CFM/  
TON.  
1331  
440  
1264  
428  
1209  
412  
1119  
399  
1454  
521  
1388  
510  
1311  
490  
1230  
477  
• Reduce airflow by 2% for  
208-volt operation.  
420  
885  
1,565 1,510 1,415 1,340 1,260 1,135 1,035  
CFM  
WATTS  
CFM  
495  
480  
460  
445  
425  
405  
385  
355  
1122  
1078  
330  
1032  
321  
972  
310  
915  
300  
804  
283  
687  
264  
935  
363  
1055  
442  
558  
250  
748  
330  
939  
WATTS 338  
CFM 1387  
WATTS 456  
CFM 1521  
WATTS 534  
1331  
440  
1264  
428  
1209  
412  
1119  
399  
1041  
382  
1454  
521  
1388  
510  
1311  
490  
1230  
477  
1144  
461  
420  
1,140 1,395 1,360 1,310 1,265 1,235 1,190  
1,130  
CFM  
WATTS  
CFM  
275  
1,795 1,765 1,715 1,695 1,650 1,600 1,500  
475 490 505 520 530 535 510  
1,860 1,820 1,785 1,745 1,700 1,625 1,515  
515 530 545 565 570 550 535  
1,755 1,720 1,685 1,645 1,615 1,570 1,530  
420 435 455 460 475 490 500  
1,850 1,820 1,775 1,735 1,705 1,675 1,610  
480 500 515 525 535 555 545  
2,180 2,125 2,050 1,975 1,875 1,800 1,655  
770 755 725 700 675 640 575  
285  
295  
315  
325  
335  
345  
355  
1,375  
475  
T2 / T3  
(W2)  
WATTS  
CFM  
1,395  
485  
T4 / T5  
(Y)  
WATTS  
CFM  
1,465  
500  
T1 (G)  
WATTS  
CFM  
1,495  
520  
T2 / T3  
W2  
WATTS  
CFM  
1,530  
540  
T4 / T5  
Y
WATTS  
11  
SPEED TAP ADJUSTMENTS FOR INDOOR BLOWER MOTOR  
PSC Motor  
SATURATED LIQUID PRESSURE  
TEMPERATURE CHART  
Adjust the CFM by changing the speed tap of the indoor blower  
motor at the EBTDR “COM” connection with one of the speed taps  
on “M1” or “M2”. (Black-High Speed, Blue-Medium Speed, Red-  
Low Speed.)  
Liquid  
Pressure  
PSIG  
200  
Saturated Liquid  
Temperature °F  
R-410A  
70  
X-13 Motor  
210  
73  
Adjust the CFM by changing the 24V low voltage lead at the speed  
terminal block on the motor. (T1-Low Speed, T2 and T3-Medium  
Speed, T4 and T5-High Speed).  
220  
225  
235  
76  
78  
80  
245  
83  
255  
265  
85  
88  
REFRIGERANT CHARGE CHECKS  
After completing airflow measurements and adjustments, the unit’s  
refrigerant charge must be checked. The unit is factory charged  
based on 400 CFM per ton at minimum ESP per AHRI test condi-  
tions (generally between .15 - .25 ESP). When air quantity or ESP  
is differs from this, charge must be readjusted to the proper amount.  
All package units are charged to the superheat method at the  
compressor suction line (these are fixed orifice devices).  
For charging in the warmer months, 8 +/-3ºF superheat at the com-  
pressor is required at conditions: 95ºF outdoor ambient (dry bulb  
temperature), 80ºF dry bulb / 67ºF wet bulb indoor ambient, ap-  
proximately 50% humidity. This superheat varies when conditions  
vary from the conditions described.  
275  
285  
295  
305  
325  
355  
375  
405  
90  
92  
95  
97  
101  
108  
112  
118  
SYSTEMSUPERHEAT  
A superheat charge chart is available for other operating condi-  
tions. Use it to provide the correct superheat at the conditions the  
unit is being charged at.  
After superheat is adjusted it is recommended to check unit sub-  
cooling at the condenser coil liquid line out. In most operating  
conditions 10 - 15ºF of sub-cooling is adequate.  
SUPERHEAT CAN BE DETERMINED AS FOLLOWS:  
1. Read suction pressure. Determine Saturated Suction  
Temperature from tables or pressure gauge saturated  
temperature scale (R-410A).  
2. Read suction line temperature.  
3. Use the following formula:  
SUPERHEAT = SUCTION LINE TEMP - SAT. SUCTION TEMP  
SUPERHEAT=SUCTIONLINETEMP-SAT.SUCTIONTEMP  
ELECTRICAL ADJUSTMENTS  
SATURATED SUCTION PRESSURE  
TEMPERATURE CHART  
This series of electric cooling and, heat pump package equipment  
is designed to accept a field installed electric heat kit. The unit is  
equipped to easily install the HKR Series Electric Heat Kit. Full In-  
stallation Instructions are included in this kit. Please use this docu-  
ment for guidance in field equipping the package unit with electric  
heat.  
Choose the heat kit that fits the application for the specific installa-  
tion. Permanently mark the unit’s nameplate with the model being  
installed. High and low voltage connections are detailed in the heat  
kit instructions.  
Suction  
Saturated Suction  
Pressure  
PSIG  
50  
Temperature °F  
R-410A  
1
52  
3
54  
4
56  
6
58  
7
Indoor Blower motor speed tap selection may need to be modified  
to accommodate normal continuous operation to prevent a nui-  
sance trip. See following table.  
60  
62  
64  
66  
68  
70  
72  
71  
8
10  
11  
13  
14  
15  
16  
17  
19  
20  
21  
76  
78  
80  
SUBCOOLING =SAT.LIQUIDTEMP.-LIQUIDLINETEMP.  
12  
OUTSIDE AIR INTO RETURN DUCT  
Electric Heat KW  
Unit Model Number  
GPH1324M41**  
5
M(F)  
M(F)  
8
M(F)  
M(F)  
10  
15  
H
20  
NA  
NA  
NA  
NA  
3(F)  
3(F)  
Do not introduce cold outside air into the return duct of a heat  
pump installation. Do not allow air entering the indoor coil to drop  
below 65° F. Air below this temperature will cause low discharge  
pressure, thus low suction pressure, and excessive defrost cy-  
cling resulting in low heating output. It may also cause false de-  
frosting.  
M
(F)  
M
H
GPH1330M41**  
GPH/GPC1336M41**  
GPH1342M41**  
(F)  
H(F)  
H(F)  
H(F)  
3(F)  
3(F)  
M
M
3(F)  
3(F)  
M
M
3(F)  
3(F)  
H(F)  
3(F)  
3(F)  
GPH/GPC1348M41**  
GPH/GPC1360M41**  
UNDERCHARGE  
An undercharged heat pump on the heating cycle will cause low  
discharge pressure resulting in low suction pressure and frost  
accumulation on the outdoor coil.  
H(F)  
3(F)  
3(F)  
---  
---  
---  
---  
---  
---  
---  
---  
---  
NA  
3(F)  
3(F)  
GPC1336M43**  
GPC1348M43**  
GPC1360M43**  
POOR “TERMINATING” SENSOR CONTACT  
*(F) - Factory Setting  
The unit’s defrost terminating sensor must make good thermal  
contact with the outdoor coil tubing. Poor contact may not termi-  
nate the unit’s defrost cycle quickly enough to prevent the unit from  
cutting out on high discharge pressure.  
Speed Taps Description: H / 4, 5 - High; M / 2, 3 - Medium; L / 1 - Low  
3 speed (H)igh/(M)edium/(L)ow: PSC motor  
4 speed (H)igh/(ML)Medium Low/ (MH) Me diu m High/(L)ow: PSC motor  
1/2/3/4/5: X-13 motor  
MALFUNCTIONING REVERSING VALVE - THIS MAY BE DUE TO:  
MAINTENANCE  
1. Solenoid not energized - In order to determine if the  
solenoid is energized, touch the nut that holds the solenoid  
cover in place with a screwdriver. If the nut magnetically  
holds the screwdriver, the solenoid is energized and the  
unit is in the cooling cycle.  
2. No voltage at unit’s solenoid - Check unit voltage. If no  
voltage, check wiring circuit.  
3. Valve will not shift:  
WARNING  
HIGH VOLTAGE!  
DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING  
THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE  
TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR  
DEATH.  
a. Undercharged - check for leaks;  
b. Valve Body Damaged - Replace valve;  
The Self Contained PackageAir Conditioner and Heat Pump should  
operate for many years without excessive service calls if the unit is  
installed properly. However it is recommended that the homeowner  
inspect the unit before a seasonal start up. The coils should be  
free of debris so adequate airflow is achieved. The return and  
supply registers should be free of any obstructions. The filters  
should be cleaned or replaced. These few steps will help to keep  
the product up time to a maximum. The Troubleshooting Chart  
(on page 11) should help in identifying problems if the unit does  
not operate properly.  
c. Unit Properly Charged - If it is on the heating cycle,  
raise the discharge pressure by restricting airflow  
through the indoor coil. If the valve does not shift, tap it  
lightly on both ends with a screwdriver handle. DO NOT  
TAP THE VALVE BODY. If the unit is on the cooling cycle,  
raise the discharge pressure by restricting airflow  
through the outdoor coil. If the valve does not shift after  
the above attempts, cut the unit off and wait until the  
discharge and suction pressure equalize, and repeat  
above steps. If the valve does not shift, replace it.  
SERVICE  
THE FOLLOWING INFORMATION IS FOR USE BY QUALIFIED  
SERVICE AGENCY ONLY: OTHERS SHOULD NOTATTEMPT TO  
SERVICE THIS EQUIPMENT.  
Common Causes of Unsatisfactory Operation of Heat Pump on  
theHeatingCycle.  
INADEQUATE AIR VOLUME THROUGH INDOOR COIL  
When a heat pump is in the heating cycle, the indoor coil is func-  
tioning as a condenser. The return air filter must always be clean,  
and sufficient air volume must pass through the indoor coil to  
prevent excessive discharge pressure, and high pressure cut out.  
13  
TROUBLESHOOTING CHART  
POSSIBLE CAUSE  
REMEDY  
SYMPTOM  
High head - low suction  
High head - high or normal suction  
a. Restriction in liquid line or flowrator  
a. Dirty condenser coil  
a. Remove or replace with proper size flowrator.  
a. Clean coil.  
b. Overcharged  
b. Correct System charge.  
c. Condenser fan not running  
c. Repair or Replace.  
Low head - high suction  
a. Incorrect flowrator  
b. Defective compressor valves  
c. Flowrator not seating properly  
a. Replace with correct flowrator.  
b. Replace compressor.  
c. Check for debris under flowrator or deformed  
flowrator. Remove debris or replace flowrator.  
d. Defective reversing valve  
d. Replace reversing valve.  
Unit will not run  
a. Power off or loose electrical connection  
a. Check for unit voltage at contactor in unit.  
b. Thermostat out of calibration set too high b. Reset.  
c. Defective contactor  
c. Check for 24 volts at contactor coil replace if  
contacts are open.  
d. Blown fuses or tripped breaker  
d. Replace fuse or reset breaker.  
e. Transformer defective  
f. High or low pressure control open  
(Optional)  
e. Check wiring - replace transformer.  
f. Reset high pressure control or check unit charge.  
High pressure control opens at 610 psig.  
Low pressure control opens at 22 psig.  
g. Replace compressor.  
g. Compressor overload contacts open  
a. Loose connection  
NOTE: Wait at least 2 hours for overload to reset.  
Condenser fan runs,  
compressor doesn't  
a. Check for unit voltage at compressor check &  
tighten all connections.  
b. Compressor stuck, grounded or open  
winding open internal overload  
b. Wait at least 2 hours for overload to reset If still  
open, replace the compressor.  
c. Low voltage connection  
c. At compressor terminals, voltage must be within  
10 % of nameplate volts when unit is operating.  
d. Capacitor weak, open, or shorted  
a. Low indoor airflow  
d. Check capacitor. If defective, replace.  
Low suction - cool compressor  
Iced evaporator coil  
a. Increase speed of blower or reduce restriction -  
replace air filters.  
Compressor short cycles  
a. Defective overload protector  
b. Unit cycling on low pressure control  
a. Replace - check for correct voltage.  
b. Check refrigerant charge and / or airflow.  
Registers sweat  
a. Low airflow  
a. Increase speed of blower or reduce restriction  
replace air filters.  
High suction pressure  
a. Excessive load  
a. Recheck load calculation.  
b. Defective compressor  
c. Reversing valve not seating properly.  
a. Improperly sized unit  
b. Improper airflow  
b. Replace.  
c. Replace.  
Insufficient cooling  
a. Recalculate load.  
b. Check - should be approximately 400 CFM per  
ton.  
c. Incorrect refrigerant charge.  
d. Incorrect voltage  
c. Charge per procedure attached to unit service  
panel.  
d. At compressor terminals, voltage must be within  
10% of nameplate volts when unit is operating.  
14  
APPENDIX  
UNIT DIMENSIONS  
47  
51  
POWER  
WIRE  
A
ENTRANCE  
4 1/8  
16  
2 1/8  
1 3/8  
5 ½  
16  
6 ½  
B
8
2 34  
SUPPLY  
B
SUCTION/LIQUID  
PRESSURE PORT  
RETURN  
3
CONDENSATE  
DRAIN  
CONNECTION  
3/4” NPT FEMALE  
CONTROL  
WIRE  
ENTRANCE  
18 7/8  
BLOWER  
ACCESS PANEL  
MEDIUM CHASSIS  
GP*1324M4**  
GP*1330M4**  
GP*1336M4**  
GP*1342M4**  
LARGE CHASSIS  
GP*1348M4**  
GP*1360M4**  
15  
MINIMUM CLEARANCES  
48" MIN  
12" MIN  
36" MIN  
(FOR  
SERVICE)  
3"  
MIN  
.
12" MIN  
36" MIN  
(FOR SERVICE)  
NOTE: Roof overhand should be no more than 36”  
RECOMMENDED FILTER SIZES  
UNIT  
2 ton  
2-1/2 ton  
3 ton  
3-1/2 ton  
4 ton  
5 ton  
Min. Filter Size  
(1) 25x25x1  
(1) 25x25x1  
(1) 25x25x1  
(1) 25x25x1  
(2) 20x20x1  
(2) 20x20x1  
Goodman Manufacturing Company, L.P.  
5151 San Felipe, Suite 500, Houston, TX 77056  
© 2010 Goodman Manufacturing Company, L.P.  
16  

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