Conventional Systems - Honeywell Home T6 Pro Smart Professional Install Manual

Wiring
NOTES:
1 Available wiring configurations differ by product models/product numbers.
2 Use 18- to 22- gauge thermostat wire. Shielded cable is not required.
3 Set the R Slider Tab on the UWP to the up position (1 wire) for 1 transformer
systems or the down position (2 wires) for 2 transformer systems. See "Setting
Slider Tabs" on page 5.
4 Set the U Slider Tab to the up position (1 wire) for non-powered ventilation or the
down position (2 wires) for powered ventilation. See "Setting Slider Tabs" on page
5.

Conventional systems

1H/1C System (1 transformer)
R
Power
Rc
[R+Rc joined by Slider Tab]
Y Compressor contactor
C 24VAC common
W Heat relay
G Fan relay
1H/1C System (2 transformers)
R
Power (heating transformer)
Rc Power (cooling transformer)
Y Compressor contactor
C 24 VAC common from cooling transformer
W Heat relay
G
Fan relay
2H/2C System (1 transformer)
R Power
Rc [R+Rc joined by Slider Tab]
Y Compressor contactor (stage 1)
C 24VAC common
W
Heat relay (stage 1)
G
Fan relay
W2 Heat relay (stage 2)
Y2 Compressor contactor (stage 2)
Hot Water Relay Panel
R Power
Rc
[R+Rc joined by Slider Tab]
W
Heat Relay
C 24VAC common
NOTE: If the panel does not provide 24 volts AC
at R and C, set the slider to down position and
wire a separate transformer to Rc and C.
Heat-only System with Fan
R
Power
Rc [R+Rc joined by Slider Tab]
C 24VAC common
W Heat relay
G Fan relay
Cool-only System with Fan
R Power
Rc [R+Rc joined by Slider Tab]
Y Compressor contactor
C 24VAC common
G
Fan relay
6