Wiring

Conventional Systems

Alternate wiring (for conventional systems)

If labels do not match terminals, connect wires as shown below.

WIRING NOTES:

  1. If you must connect both R and Rc wires, set the R Slider Tab to the down position (2 wires).

  2. If your old thermostat had both R and Rh wires, set the R Slider Tab to the down position (2 wires). Then connect the R wire to the Rc terminal, and the Rh wire to the R terminal.

  3. If your old thermostat had only one C or C1 wire, connect it to the C terminal. If your old thermostat had two C or C1 wires, wrap each separately with electrical tape and do not connect them.

  4. C does not power the thermostat display or operations; batteries are always required.

Heat Pump

WIRING NOTES:

  1. Match each labeled wire with same letter on new thermostat.

  2. Insert the wires into the matching terminal.

NOTE: If you have difficulty inserting wires, you may have to press down the terminal push button next to the corresponding terminal. If the labels do not match the letters on the thermostat, see the diagram above.

Heat Pumps

Alternate wiring (for heat pumps only)

WIRING NOTES:

  1. Keep R Slider Tab in the up position (1 wire).

  2. If your old thermostat had both V and VR wires, stop now and contact a qualified contractor for help.

  3. If your old thermostat had separate O and B wires, attach the B wire to the C terminal. If another wire is attached to the C terminal, stop now and contact a qualified contractor for help.

  4. If your old thermostat had Y1, W1 and W2 wires, stop now and contact a qualified contractor for help.

  5. C does not power the thermostat display or operations; batteries are always required.

  6. This model does not support the heat pump fault alert (L/A terminal). If this is desired, please contact a contractor for replacement model.

IMPORTANT: Do NOT use W for heat pump applications. Auxiliary heat must wire to AUX or E.