Sample Wiring Diagrams
5 Wire, 1 Stage Cooling, 2 Stage Heat-Heat Pump with O reversing valve.
Residential Heat Pumps, split systems & package units, with auxiliary heat.
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Page 9
T1045
INSTALLATION INSTRUCTIONS
Common wire is optional in all installations. If a common wire is not
used the thermostat must be powered by two AA alkaline batteries.
These batteries must be replaced (page 6) each year or when the Low
Battery indicator is displayed (page 3).
5 Conductor 18 to 22 gauge
unshielded cable from the
thermostat to the equipment.
FAN
G
POWER
R
O
REVERSING VALVE
COMPRESSOR
Y
AUXILIARY HEAT
W
Common wire optional
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O B G W Y R C
