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TABLE OF CONTENTS
TO THE INSTALLER ........................................................2
SHIPPING INSPECTION ...................................................3
Checking Products Received ....................................3
Message to the Homeowners ....................................3
REPLACEMENT PARTS ...................................................3
Ordering Parts ...............................................................3
IMPORTANT SAFETY INSTRUCTIONS ........................3
CODES AND REGULATIONS ...........................................3
General .........................................................................3
EPA Regulations ..........................................................4
National Codes ............................................................4
MAJOR COMPONENTS ..................................................4
INSTALLATION ................................................................4
Pre-Installation Checks ............................................4
Clearances and Accessibility ..................................4
Ground Level Pre-Installation Details ..................4
Unit location ................................................................4
Roof Top Installation details ..................................5
Roof Curb Installations ............................................5
Rigging Details ............................................................5
CIRCULATING AIR AND FILTERS.................................6
Air flow Conversion ..................................................6
Ducting ..........................................................................6
Manufactured Home MOD Kit ...................................7
Plenum Application .....................................................7
Filters ...........................................................................7
CONDENSATE DRAIN PIPING ......................................7
ELECTRICAL WIRING ....................................................8
High Voltage Wiring ...................................................8
Low Voltage Wiring ....................................................8
Internal Wiring ...........................................................9
STARTUP PROCEDURES AND CHECKLISTS ............9
Air Conditioners Start-Up Procedures .................9
Heat Pump Start-Up Procedure ................................9
Final System Checks ................................................10
COMPONENTS ..............................................................10
Contactor ...................................................................10
Crankcase Heater .....................................................10
Condensor Motor .....................................................10
Compressor ................................................................10
Contactor Relay .......................................................10
Defrost Control .......................................................10
Outdoor Thermostat ................................................10
Reversing Valve Coil ................................................10
Indoor Blower Motor .............................................. 11
Blower Interlock Relay .......................................... 11
HEAT PUMP OPERATION ............................................... 11
Cooling Cycle ............................................................ 11
Heating Cycle............................................................. 11
Defrost Control ....................................................... 11
TROUBLESHOOTING .................................................12
Testing Thermostat Control ..................................12
Total External Static Pressure ............................13
ECM Motor Speed Adjustment ...............................13
GPHM5 Dip Switch Functions ..................................13
GPHM5 CFM Delivery and Adjustments ................13
GPHM5 Thermostat "Fan Only" Mode ....................13
GPHM5 Humidity Control ........................................13
SUPERHEAT AND SUBCOOLING ..................................13
Refrigerant Charge Check .....................................13
Checking Superheat .................................................13
Checking Subcooling ...............................................14
Units with TXV Devices .............................................14
Heater Kit ...................................................................14
MAINTENANCE ...............................................................15
SERVICE ..........................................................................15
Outside Air into Return Duct ................................15
Undercharge .............................................................15
Poor "Terminating" Sensor contact ...................15
Malfunctioning Reversing Valve ...........................15
REVERSING VALVE TROUBLESHOOTING ..................15
TROUBLESHOOTING CHART .....................................17
GPHM5 BLOWER PERFORMANCE DATA ....................18
DIMENSIONS .................................................................20
WIRING DIAGRAM ........................................................21
HOWEOWNERS'S ROUTINE MAINTENANCE ..........22
START-UP CHECKLIST ................................................23
TO THE INSTALLER
Carefully read all instructions for the installation prior
to installing unit. Make sure each step or procedure is
understood 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 problems 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 compressor.
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.
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Troubleshooting
