Power Options
The ElitePRO™ Series Thermostat requires 24 VAC at R and C (or Rc and C on 2-transformer system) to power the display.
Insert R and C wires into designated terminals for AC power. Remove wires by pressing down on the terminal tabs. (C terminal is required for ElitePRO™ Series Thermostats).
No C-wire?:
If there is no C-wire from the previous thermostat and no extra wire in the bundle to the thermostat, but it does have wires to both Y and G, you may use the THP9045A C-wire adapter (sold separately).
For more information on the THP9045A C-wire adapter, go to: C-WIRE Adapter Installation Guide
Video: Add a C-Wire Adapter
Watch this video for step-by-step instructions on adding a C-Wire adapter to the ElitePRO™ Series Thermostats.