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3 69-1823EFS—05
Wiring guide
M23487
FACTORY INSTALLED
JUMPER BETWEEN R,
RC AND RH
1
2
3
C
R
RC
RH
COMMUNICATION
TERMINALS
COMMUNICATION LED
W1
W2
W3
Y
Y2
G
24 VAC
O/B
AUX
AUX2
Y
Y2
G
1
2
3
CONV. HP
HEAT 1 RELAY
HEAT 2 RELAY
HEAT 3 RELAY
COOL 1 RELAY
COOL 2 RELAY
FAN RELAY
WIRE TO TERMINALS ON THERMOSTAT.
1
1
Typical hookup of conventional system with up to three-stage heat and two-stage cool with one
transformer (3H/2C, 2H/2C, 2H/1C, 1H/2C, 1H/1C, 1H, 2H, 3H, 1C, 2C conventional).
M23490
1
2
3
C
R
RC
RH
24 VAC
H1
U
M2
D1
H
M2
V1
N
T2
OR
POWERED
HUMIDIFIER
Typical hookup of powered humidifier.
M23488
FACTORY INSTALLED
JUMPER BETWEEN R,
RC AND RH
1
2
3
C
R
RC
RH
COMMUNICATION
TERMINALS
COMMUNICATION LED
W1
W2
W3
Y
Y2
G
24 VAC
O/B
AUX
AUX2
Y
Y2
G
1
2
3
CONV. HP
CHANGEOVER
AUX 1 (HEAT 3)
AUX 2 (HEAT 4)
COMP 1
COMP 2
FAN RELAY
WIRE TO TERMINALS ON THERMOSTAT.
1
1
Typical hookup of heat pump system with up to four-stage heat and two-stage cool with one
transformer (4H/2C, 3H/2C, 2H/2C, 2H/1C, 1H/1C heat pump systems).
Wiring guide—equipment
With power supply
Without power supply
M23489
FIELD INSTALLED
JUMPER BETWEEN
R AND HUM 1
1
2
3
C
R
RC
RH
24 VAC
H1
U
M2
D1
H
M2
V1
N
T2
OR
NON-POWERED
HUMIDIFIER
Typical hookup of non-powered humidifier.