Honeywell CT87B Owner's Manual - Page 7
CT87A, B, J ROUNDfi THERMOSTAT, Fig. 8. CT87A for a 2-wire heating only system.
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CT87A,B,J ROUND® THERMOSTAT Fig. 8. CT87A for a 2-wire heating only system. CT87A WALLPLATE R Y W POWER HEAT TO SYSTEM M20183 Fig. 9. CT87A for a 3-wire hot water heating only system. R Y W CT87A WALLPLATE WIRE LABELS (LETTERS ON ORIGINAL THERMOSTAT TERMINALS) R 3-WIRE W HOT WATER ZONE VALVE B M20184 Fig. 10. CT87B for a 4-wire heating/cooling system. COOL • OFF • HEAT FAN ON RH G RC Y W AUTO • CT87B SUBBASE POWER FAN COOL TO SYSTEM HEAT JUMPER RH TO RC M20185 7 69-0274-6
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CT87A,B,J ROUNDfi THERMOSTAT
7
69-0274-6
Fig. 8. CT87A for a 2-wire heating only system.
Fig. 9. CT87A for a 3-wire hot water heating only system
.
Fig. 10. CT87B for a 4-wire heating/cooling system
.
M20183
CT87A WALLPLATE
TO
SYSTEM
R
W
Y
POWER
HEAT
M20184
WIRE LABELS
(LETTERS
ON ORIGINAL
THERMOSTAT
TERMINALS)
CT87A WALLPLATE
3-WIRE
HOT WATER
ZONE VALVE
R
W
Y
R
B
W
C
O
O
L
•
O
F
F
•
H
E
A
T
F
A
N
O
N
•
A
U
T
O
M20185
POWER
CT87B SUBBASE
TO
SYSTEM
R
H
G
R
C
W
Y
FAN
HEAT
COOL
JUMPER
R
H
TO
R
C