GPH14M Installation Manual

2
WARNING
I NSTALLATION AND REPAIR OF THIS UNIT SHOULD BE
PERFORMED
ONLY BY INDIVIDUALS MEETING
THE REQUIREMENTS OF AN “E NTRY L EVEL T ECHNICIAN ” AS
SPECIFIED
BY THE A IR -C ONDITIONING , H EATING , AND
R EFRIGERATION I NSTITUTE (AHRI). A TTEMPTING TO
INSTALL
OR REPAIR THIS UNIT WITHOUT SUCH BACKGROUND MAY
RESULT
IN PRODUCT DAMAGE , PERSONAL INJURY OR DEATH .
(
AT A MINIMUM )
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 in-
stallation. 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 compres-
sor. Compressor damage may occur if this step is not fol-
lowed.
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
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, specifica-
tions, 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 manufac-
turer assumes no responsibility for installation of incorrectly
shipped units.
INDEX
TO THE INSTALLER ....................................................... 2
SHIPPING INSPECTION ................................................... 2
REPLACEMENT PARTS.................................................... 3
ORDERING PARTS ........................................................ 3
SAFETY INSTRUCTIONS .................................................. 3
CODES AND REGULATIONS ............................................ 3
EPA REGULATIONS ...................................................... 3
NATIONAL CODES ......................................................... 3
MAJOR COMPONENTS .................................................... 4
PRE-INSTALLATION CHECKS .......................................... 4
CLEARANCES AND ACCESSIBILITY .................................... 4
U
NIT LOCATION ............................................................ 4
G
ROUND LEVEL PRE-INSTALLATION DETAILS ...................... 4
ROOF TOP PRE-INSTALLATION DETAILS ............................. 4
R
OOF CURB INSTALLATIONS ONLY ................................... 4
R
IGGING DETAILS ......................................................... 5
CIRCULATING AIR AND FILTERS .................................... 5
AIRFLOW CONVERSION ................................................. 5
DUCT WORK ............................................................... 5
FILTERS ..................................................................... 6
PIPING .............................................................................. 6
CONDENSATE DRAIN...................................................... 6
WIRING ............................................................................. 6
HIGH VOLTAGE WIRING ................................................. 7
LOW VOLTAGE WIRING ................................................. 7
INTERNAL WIRING ........................................................ 7
STARTUP, ADJUSTMENTS, AND CHECKS ...................... 7
START-UP PROCEDURE AND CHECKLIST ........................... 7
HEAT PUMP START-UP PROCEDURE ................................. 7
FINAL SYSTEM CHECKS ................................................. 8
COMPONENTS ................................................................. 8
CRANKCASE HEATER ..................................................... 8
CONDENSER MOTOR .................................................... 8
COMPRESSOR .............................................................. 8
CONTACTOR RELAY ....................................................... 8
DEFROST CONTROL ...................................................... 8
OUTDOOR THERMOSTAT ................................................. 8
REVERSING VALVE COIL ................................................ 8
INDOOR BLOWER MOTOR .............................................. 8
BLOWER INTERLOCK RELAY ........................................... 8
HEAT PUMP OPERATION ................................................. 9
COOLING CYCLE .......................................................... 8
HEATING CYCLE ........................................................... 9
DEFROST CONTROL ...................................................... 9
SUGGESTED FIELD TESTING/TROUBLE SHOOTING .............. 9
AIRFLOW MEASUREMENT AND ADJUSTMENT .................... 10
REFRIGERANT CHARGE CHECKS ................................... 12
EXPANSION VALVE (TXV) SYSTEM ................................. 13
SYSTEM CHARGING HEATING MODE ............................... 13
ELECTRICAL ADJUSTMENTS ........................................ 13
MAINTENANCE ............................................................... 13
S
ERVICE .................................................................. 14
I
NADEQUATE AIR VOLUME THROUGH INDOOR COIL ......... 14
OUTSIDE AIR INTO RETURN DUCT ............................... 14
U
NDERCHARGE ......................................................... 14
P
OOR “TERMINATING” SENSOR CONTACT ...................... 14
MALFUNCTIONING REVERSING VALVE -
T
HIS MAY BE DUE TO: ............................................. 14
TROUBLESHOOTING CHART ........................................ 15
APPENDIX ...................................................................... 16
UNIT DIMENSIONS ......................................................... 16
MINIMUM CLEARANCES ................................................ 17
RECOMMENDED FILTER SIZES ..................................... 17
START-UP CHECKLIST................................................... 19