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CT87A,B,J ROUND® THERMOSTAT
69-0274-6 8
Fig. 11. CT87B for a 5-wire heating/cooling system.
Fig. 12. CT87J for a 4-wire single stage heat pump.
Fig. 13. CT87J for 4-wire single stage heat pump.
C
O
O
L
•
O
F
F
•
H
E
A
T
F
A
N
O
N
•
A
U
T
O
M2022
5
HEATING
POWER
CT87B SUBBASE
TO
SYSTE
M
TO
SYSTEM
R
H G
R
C
W
Y
FAN
HEAT
COOLING
POWER
COOL
C
O
O
L
•
O
F
F
•
H
E
A
T
F
A
N
O
N
•
A
U
T
O
M2018
6
HEAT
CT87J SUBBASE
TO
SYSTE
M
WG
Y
P
B
R
O
FAN
POWER
DO NOT ATTACH WIRES
TO BOTH B AND O
JUMPER W TO Y
COOL
REVERSING VALVE
HEAT
REVERSING VALVE
C
O
O
L
•
O
F
F
•
H
E
A
T
F
A
N
O
N
•
A
U
T
O
M2022
8
CT87J SUBBASE
TO
SYSTE
M
WG
Y
P
B
O
R
POWER
FAN
DO NOT ATTACH WIRES
TO BOTH B AND O
HEAT PUMP
COMPRESSOR
COOL
REVERSING
VALVE
HEAT
REVERSING
VALVE
1
1
IF WIRES ARE ATTACHED TO Y OR W, AND P ON YOUR OLD
THERMOSTAT, CONTACT YOUR LOCAL CONTRACTOR FOR
FURTHER ASSISTANCE.