4 Wire, 1 Stage Cooling, 1 Stage Heat-Heat Pump with B reversing valve*.
Residential Heat Pumps, split systems & package units, with no auxiliary heat.
REVERSING VALVE
COMPRESSOR
FAN
POWER
G
RY
W
Y
B
O
G
R
B
C
Common wire optional
**
Sample Wiring Diagrams
Page 10
**
Common wire is optional in all installations. If a common wire is not used the
thermostat must be powered by the two AA Alkaline batteries (page 6). These
batteries must be replaced each year or when the Low Battery indicator is
displayed (page 2, 5).
*
See page 14 regarding jumper configuration.
4 Conductor 18 to 22 gauge
unshielded cable from the
thermostat to the equipment.
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