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TB2
HEAT PUMP “A”
TB2
HEAT PUMP “B”
G2/(W)
G3/(Y)
COM
G
MED(HEAT)
HI(COOL)
(VALVE)
FAN
LO
R
Y1
Y2
W1
W2
G
C
O
WHT
WHT
C2
IFC
C1
R
Y1
Y2
W1
W2
G
C
X
524A-H
HEAT ACCESSORY
W1
W2
C
524A-H240
TERMINAL BLOCK
TB1
FIELD POWER
WIRING
DISCONNECT
FIELD
POWER
SUPPLY
3-Ph ONLY
L1
L2
L3
EQUIP GND
TB1
HC1
HC1
CIRCUIT BREAKER
(5 HP AND LARGER)
UNIT WIRING
IFM
BLK
BLK
BLK
21
22
23
12
13
11
1
2
3
HTR1
IFC
RELAY BOARD
(33ZCRLYBRD)
TSTAT
CR
Y2
R
Y1
C
X
W1
W2
G
Y2
R
Y1
C
X
W1
W2
G
CR
LEGEND
NOTE: Use copper conductors only.
CR — Control Relay (Field-Supplied)
EQUIP — Equipment
GND — Ground
HC — Heating Contactor
HTR — Electric Heater
IFC — Indoor-Fan Contactor
IFM — Indoor-Fan Motor
TB — Terminal Block
TSTAT — Thermostat
Factory Wiring
Field Control Wiring
Fig. 12 — Wiring Diagram — Duplex 575C120 With 524A-H240 and Electric Heat