6
* This thermostat requires a C-Wire. If a C-Wire is not available and the system uses Y and G, use C-Wire
adapter accessory THP9045A.
Wiring
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
NOTES:
1. Use 18 to 22 gauge thermostat wire. Shielded cable is not required.
2. 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 4.
3. Set the U Slider Tab as shown in the diagrams on page 4.
4. When T10+ is used with THM04R3000 EIM, wire only R and C to T10+ to power
the thermostat. Then follow the wiring diagrams included in EIM literature.
Conventional systems
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)
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
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.
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