For ct1502 heating/cooling – Honeywell CT1503 User Manual
Page 10
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TABLE 2—TERMINAL DESIGNATIONS.
OLD SUBBASE
TERMINAL
CONTROL FUNCTION
R or RH
Heating transformer power to
control circuit.
RC
Cooling transformer power to
control circuit.
W
Heating relay or valve.
Y
Cooling relay.
G
Fan relay.
B
Heating changeover valve or
damper control circuit.
0
Cooling changeover valve or
damper control circuit.
P
Heat pump compressor control
circuit.
□
Push excess wire back into wall, and plug
hole in wall with nonflammable insulation to
prevent drafts from affecting thermostat operation.
For CT1502 heating/cooling
CENTRAL ELECTRIC SYSTEM
A
l\ POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED,
^