2
INDEX
TO THE INSTALLER ................................................3
S
HIPPING INSPECTION ......................................................3
Replacement Parts ..................................................3
O
RDERING PARTS ..................................................3
Safety Instructions...................................................3
Codes and Regulations...........................................3
EPA R
EGULATIONS ................................................4
N
ATIONAL CODES ..................................................4
MAJOR COMPONENTS ..........................................4
Pre-Installation Checks ...........................................4
C
LEARANCES AND ACCESSIBILITY ..............................4
U
NIT LOCATION ......................................................4
G
ROUND LEVEL PRE-INSTALLATION DETAILS ...............4
R
OOF TOP PRE-INSTALLATION DETAILS .....................4
R
OOF CURB INSTALLATIONS ONLY ............................5
R
IGGING DETAILS ..................................................5
Circulating Air and Filters .......................................5
A
IRFLOW CONVERSION ...........................................5
D
UCT WORK ..........................................................6
F
ILTERS ...............................................................6
PIPING.......................................................................6
C
ONDENSATE DRAIN ...............................................6
Wiring ........................................................................7
H
IGH VOLTAGE WIRING ...........................................7
L
OW VOLTAGE WIRING ............................................7
I
NTERNAL WIRING ...................................................7
Startup, Adjustments, and Checks .........................8
S
TART-UP PROCEDURE AND CHECKLIST .....................8
H
EAT PUMP START-UP PROCEDURE ..........................8
F
INAL SYSTEM CHECKS ..........................................8
Components .............................................................8
HEAT PUMP OPERATION .......................................9
C
OOLING CYCLE ...................................................9
H
EATING CYCLE ....................................................9
D
EFROST CONTROL ..............................................10
S
UGGESTED FIELD TESTING/TROUBLE SHOOTING ......10
A
IRFLOW MEASUREMENT AND ADJUSTMENT ...............10
S
PEED TAP ADJUSTMENTS
FOR INDOOR BLOWER MOTOR ...........................10
R
EFRIGERANT CHARGE CHECKS .............................10
SUPERHEAT CAN BE DETERMINED
AS FOLLOWS: ...............................................10
E
XPANSION VALVE SYSTEM
SINGLE SPEED APPLICATION (GPH1524-36) ..... 11
T
WO SPEED APPLICATION (GPH1542-60) .........11
H
EAT PUMP - HEATING CYCLE ...............................12
Electrical Adjustments ...........................................12
MAINTENANCE ......................................................12
S
ERVICE ............................................................ 11
I
NADEQUATE AIR VOLUME THROUGH INDOOR COIL .....11
O
UTSIDE AIR INTO RETURN DUCT .......................... 11
U
NDERCHARGE ....................................................12
P
OOR “TERMINATING” SENSOR CONTACT ................12
M
ALFUNCTIONING REVERSING VALVE -
T
HIS MAY BE DUE TO: ...........................................12
TROUBLESHOOTING CHART .............................13
GPH15(24-36)M41A WIRING DIAGRAM ................14
GPH15(42-60)M41A WIRING DIAGRAM ................15
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