Honeywell CT87A round Installation Instructions Manual page 8

CT87A,B,J ROUND® THERMOSTAT
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).
69-0274-5
R G
H
R
C
Y
W
W G
Y
P
R
O
B
JUMPER W TO Y
W G
Y
1
P
R
B O
1
IF WIRES ARE ATTACHED TO Y OR W, AND P ON YOUR OLD
THERMOSTAT, CONTACT YOUR LOCAL CONTRACTOR FOR
FURTHER ASSISTANCE.
8
CT87B SUBBASE
HEATING
POWER
TO
FAN
SYSTEM
COOLING
TO
POWER
SYSTEM
COOL
HEAT
M20225
CT87J SUBBASE
HEAT
TO
FAN
SYSTEM
POWER
COOL
REVERSING VALVE
HEAT
REVERSING VALVE
DO NOT ATTACH WIRES
TO BOTH B AND O
M20186
CT87J SUBBASE
FAN
POWER
HEAT
REVERSING
VALVE
COOL
TO
REVERSING
SYSTEM
VALVE
HEAT PUMP
COMPRESSOR
DO NOT ATTACH WIRES
TO BOTH B AND O
M20228