2
Filters ........................................................ 6
PIPING ........................................................ 6
Condensate Drain ......................................... 6
WIRING ....................................................... 6
High Voltage Wiring ...................................... 7
Low Voltage Wiring ....................................... 7
Internal Wiring: ........................................... 7
OPERATION .................................................. 7
Start-Up Procedure and Checklist .................... 7
Heat Pump Start-Up Procedure ....................... 8
Final System Checks ...................................... 8
COMPONENTS ...............................................
9
Contactor .................................................... 9
Crankcase Heater ......................................... 9
Condenser Motor .......................................... 9
Compressor ................................................. 9
Contactor Relay ............................................ 9
Defrost Control ............................................ 9
Outdoor Thermostat ...................................... 9
Reversing Valve Coil ...................................... 9
Indoor Blower Motor ...................................... 9
Blower Interlock Relay ................................... 9
EXPLANATION AND GUIDANCE (HEAT PUMP) .......... 9
DEFROST CONTROL ....................................... 10
SUGGESTED FIELD TESTINGN/TROUBLESHOOTING .. 10
AIR FLOW MEASUREMENT AND ADJUSTMENT ..... 10
ADJUSTING SPEED TAP FOR INDOOR
BLOWER MOTOR ........................................... 10
EXPANSION VALVE (TXV) SYSTEM
SINGLE SPEED APPLICATION
(GPH1624-36) ..........................................
11
TWO SPEED APPLICATION (GPC1560/GPH1642-60) 12
ELECTRIC HEAT INSTALLATION & ADJUSTMENT ...... 12
MAINTENANCE ............................................. 13
SERVICE ..................................................... 13
Inadequate Air Volume Through Indoor Coil .......13
Outside Air Into Return Duct ..........................13
Undercharge ..............................................13
Poor “Terminating” Sensor Contact .................13
Malfunctioning Reversing Valve ......................13
BLOWER PERFORMANCE GP* 15/16 SEER ....... 14-15
TROUBLESHOOTING CHART.............................. 16
START-UP CHECKLIST ..................................... 18
THE INSTALLER
Carefully read all instructions for the installation prior to
installing unit. Make sure each step or procedure is under-
stood and any special considerations are taken into account
before starting installation. Assemble all tools, hardware
and supplies needed to complete the installation. Some items
may need to be purchased locally. After deciding where to
install unit, closely look the location over - both the inside
and outside of home. Note any potential obstacles or prob-
lems that might be encountered as noted in this manual.
Choose a more suitable location if necessary.
IMPORTANT NOTE:
If a crankcase heater is used, the unit
should be energized 24 hours prior to compressor start up to
ensure crankcase heater has sufficiently warmed the com-
pressor. Compressor damage may occur if this step is not
followed.
Before using this manual, check the serial plate for proper
model identification.
The installation and servicing of this equipment must be
performed by qualified, experienced technicians only.
SHIPPING INSPECTION
Checking Product Received
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 installation of incorrectly shipped units.
TO THE INSTALLER ........................................... 2
SHIPPING INSPECTION .................................... 2
Checking Product Received ............................ 2
Message to the Homeowner ............................. 3
REPLACEMENT PARTS ...................................... 3
Ordering Parts ............................................. 3
IMPORTANT SAFETY INSTRUCTIONS .................... 3
Recognize Safety Symbols, Words, and Labels .... 3
CODES AND REGULATIONS ................................ 3
General ...................................................... 3
EPA Regulations ............................................ 4
National Codes ............................................. 4
MAJOR COMPONENTS ...................................... 4
General ...................................................... 4
INSTALLATION ............................................... 4
Pre-Installation Checkpoints ........................... 4
Clearance ................................................... 4
Location ..................................................... 4
Outside Slab Installation ................................ 4
Rooftop Installation ....................................... 5
DUCTING ..................................................... 5
Connecting the Return and Supply Flexible Duct
in Manufactured or
Modular Housing Application ........................... 5
Plenum Application ....................................... 6
