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*
FAN
REVERSING VALVE
POWER
Y
G
R
O
5 Conductor 18 to 22 gauge
unshielded cable from the
thermostat to the equipment.
W2
Y
B
O
G
R
C
COMPRESSOR
Common wire optional
*
W
2
ELECTRIC HEAT
OWNER'S MANUAL
MODEL P474-0140
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.
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 10) each year or when the Low Battery indicator is displayed
(page 3).
