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Sample Wiring Diagrams
Gas or Electric Heat
4 Wire, 1 Stage Cooling, 1 Stage Heating-Heat Pump with B reversing valve.
Residential Heat Pumps, split systems & package units, with no auxiliary heat.
For jumper configuration see page 21.
Factory installed
jumper between
RC and RH
POWER
FAN
COMPRESSOR
REVERSING VALVE
*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).
Common wire optional
C O/B Y W G RC RH
4 Conductor 18 to 22 gauge
unshielded cable from the
thermostat to the equipment.
14
*
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