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Honeywell Round Professional Install Manual page 9

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Separate heating and cooling transformers
Single stage heat pump with auxiliary heat (electric or dual fuel)
Two stage heat pump with auxiliary heat (electric or dual fuel)
C
Common wire (optional)
W
Heat relay
G
Fan relay
Y
Compressor contactor (stage 1)
R
Power
Rc
Power
C
Common wire (optional)
AUX Auxiliary/Emergency heat
O/B
Reversing valve
G
Fan relay
Y
Compressor contactor (stage 1)
R
Power
C
Common wire (optional)
AUX Auxiliary/Emergency heat
O/B
Reversing valve
Y2
Compressor contactor (stage 2)
G
Fan relay
Y
Compressor contactor (stage 1)
R
Power
9
Notes
• Thermostat C wire
is optional for
this application.
C wire required if
Homekit is used.
• Set the R Jumper
Switch on the wall
plate to R & Rc
Notes
• Thermostat C wire
is optional for
this application.
C wire required if
Homekit is used.
• Set the R Jumper
Switch on the wall
plate to R
Notes
• Thermostat C wire
is optional for
this application.
C wire required if
Homekit is used.
• Set the R Jumper
Switch on the wall
plate to R

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