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Sample Wiring Diagrams
5 Wire, 1 Stage Cooling, 1 Stage Heat - Heat Pump
Residential Heat Pumps*, split systems & package units.
No auxiliary heat.
W2
Y2
DEHUM
RS+5
RS1
RSGND
Optional wiring for
dehumidification
Pages 8, 19-20, and 24 of Owner's Manual
W1/O/B
Y1
G
HUM
R
C
5 conductor, 18 gauge
unshielded cable from the
thermostat to the equipment.
24 vac common
24 vac return
Fan relay
Compressor relay
Reversing valve
DEHUM terminal
on HVAC unit
(if available)
* If using a Residential heat pump,
this option must be set to on
during Advanced Setup.
Page 9
(Fail to Heat)
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