Honeywell Round Professional Install Manual page 9

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