User's Guide

19 69-2809ES—03

Do not use K terminal. For future use.

Leave jumper loop in place.

If your old thermostat had both V and VR wires, check wifithermostat.com for help.

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, check wifithermostat.com

for help. Attach the O wire to the O/B terminal. On the Type of Changeover Valve

screen, select Cooling Changeover Valve. See page 66. If your old thermostat

had an O wire and not a B wire, attach the O wire to the O/B terminal.

If your old thermostat had separate Y1, W1, and W2 wires, check

wifithermostat.com for help.

If the old thermostat has separate wires on Aux and E, use a wire nut to attach

both wires to a separate wire. Slide this third wire into the W2-Aux/E terminal.

This is the system monitor. If the monitor finds a problem, you will see an orange

alert button on the thermostat home screen.

Installing your thermostat

Alternate wiring key (Heat Pump System)