GPUM3 Installation Manual
26
A/GPUM3 [24/30/36/42/48]***41
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO
WIRING DIAGRAM
A2
PSS
PSG
PS VCC
PLI
NC BTS
NC BTS
PLO
GV RETURN
TR 24 VAC
TR GND
GV OUTPUT
PLM
12
11
10
9
8
7
6
5
4
3
2
1
FLAME ROD (T7)
COOL FAN
HEAT FAN
J5
PCBBL216
9
8
7
6
5
4
3
2
1
12
11
10
J
8
1
2
3
3
2
1
J
4
IDC (20 VDC)
I (PWM) C
I (RPM) F
PLM
FAN
PLM
DSI
54321
L2L2L1GND
J3
54321
PLM
3A
BK RDGR RDWH
PLM
PLF
GPT
3
2
1
2
1BK
GR
RDRD
BR
GV
BR
CC
T1
T2
BK
CM
BR
RC
GR
YL
BR
BK
PU
COM
H
F
RD
PU
BK
PU
COMP
M
1~
M
1~
M
1~
PLF
PLM
5
4
3
2
1
VM
YL
OR
C
L
G
N
BK
PU
BL
GR
PU
BK
T1
T2
T3
T4
T5
M
1~
YL
WH
EM
FS
YL
BL
RD
GND
TON
t = 180s
R1
Y1
BL
Y2
R2
YL
3
5
4
3
2
1
YL
GR
LINE
VOLTAGE
208-230V/1PH/60Hz
R
C
S
RD
L1
L2
BK
PU
G
R
W
Y
C
5
4
3
2
1
HPS
YL
GR
COM
TR
BR
RD
BK
RD
BK
RD
YL
OR
BR
YL
OR
BR
YL
WH
BL
WH
BK
OR
YL
BR
R C G W Y
1
1
TO THERMOSTAT
2
BK
WH
VM
GR
GR
GR
CCH
GRGRGRGR
YL
WH
3
YLYL
BL
BK
BK
RD
BL
GRWH
YL
1
REPLACEMENT WIRE MUST BE SAME SIZE AND TYPE OF
INSULATION AS ORIGINAL (AT LEAST 105° C). USE COPPER
CONDUCTORS ONLY. USE N.E.C. CLASS 2 WIRE FOR ALL
LOW VOLTAGE FIELD CONNECTIONS. USE COPPER
CONDUCTORS FOR UNIT SUPPLY POWER.
FOR 208V SUPPLY POWER, MOVE WIRES FROM THE 240V
TAP TO THE 208V TAP.
TO CHANGE COOLING SPEED, MOVE YL WIRE TO EITHER
THE T4 (LOW COOL) OR T5 (HIGH COOL) SPEED TAP. TO
CHANGE THE HEATING SPEED, MOVE WH WIRE TO EITHER
THE T2 (LOW HEAT) OR T3 (HIGH HEAT) SPEED TAPS.
2
NOTES
3
ALS AUXILIARY LIMIT SWITCH
BTS BURNER TEMPERATURE SWITCH
CC COMPRESSOR CONTACTOR
CCH CRANKCASE HEATER
CM CONDENSER MOTOR
COMP COMPRESSOR
EM EVAPORATOR MOTOR
FPS FREEZE PROTECTION SWITCH
FS FLAME SENSOR
GND EQUIPMENT GROUND
GPT GAS PRESSURE TRANSDUCER
GV GAS VALVE
COMPONENT LEGEND
HPS HIGH PRESSURE SWITCH
IGN IGNITOR
PLF FEMALE PLUG/CONNECTOR
PLM MALE PLUG/CONNECTOR
PLS PRIMARY LIMIT SWITCH
RC RUN CAPACITOR
TON ON - DELAY TIMER RELAY
TR TRANSFORMER
VM VENT MOTOR
WIRE CODE
BLACK
BLUE
BROWN
GREEN
GRAY
ORANGE
PINK
PURPLE
RED
TAN
WHITE
YELLOW
BK
BL
BR
GR
GY
OR
PK
PU
RD
TN
WH
YL
HIGH VOLTAGE
LOW VOLTAGE
OPTIONAL HIGH VOLTAGE
OPTIONAL LOW VOLTAGE
CHASSIS GROUND
FIELD WIRING
FACTORY WIRING
HIGH VOLTAGE
LOW VOLTAGE
EARTH GROUND
0140G04631-A
PLS
BTS
ALS
PU
PU
PU
ALS
PLM
PLF
PU PU
2
1
2
1
YL
RD
RD
YL
BL
BL
BL
BL
BL
RD
BK
BK
PU
BK
BKBK
BK BK
BK
RD
PU
WH
PU
RD
PU
PU
BK
BK
BK
BK
BK
WH
PU
YL
A1
CC
GR
240V
GR
THE STATUS LIGHT ON THE FURNACE CONTROL MAY BE USED AS A GUIDE TO TROUBLESHOOTING THIS
APPLIANCE. SOME MORE USEFUL STATUS LIGHT CODES ARE BELOW:
THE FAULT CONDITION MUST BE CLEARED FOR 30 SECONDS BEFORE NORMAL OPERATION CAN RESUME.
A POWER CYCLE WILL ALSO RESET ANY LOCKOUT.
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1
2
1
IGN
GR
B
A
OR
OR