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
RHG
RC
WY
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
BRO
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
BO
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.