10
11
colored wire by filling out the Wiring Chart
below. Note: If you see any of the following
wires, please contact our Customer Experience
Team to check system compatibility:
A, X or P
Wiring Chart
Label
Old
Thermostat
Typical
Wire Color
Description
HUM
Humidifier
NC
Not used
W2/E
Brown
2nd stage heat
W1/
O/B
White/
Orange/
Blue
1st stage heat/HP
reversing valves
RH
Red
Power from heat,
24VAC transformer
RC
Red
Power from cooling,
24VAC transformer
Y2
Gray
Stage 2 compressor
relay
Y1
Yellow
Stage 1 compressor
relay
Installation Details
1. Gather the tools you will need and check
that your iDevices
®
Thermostat came with the
necessary components (see page 4).
2. Test your existing system. Using your old
thermostat, turn on the heating/cooling
functions (if applicable) to verify everything is
functioning normally.
3. If you have a heat pump system, check the
settings on your old thermostat and make
a note whether you have an “O” or “B” type
reversing valve.
4. Turn the power to your HVAC system OFF at
the breaker box or the main switch controlling
your heating/cooling system.
5. Confirm that the power is OFF by adjusting
the temperature on your old thermostat and
waiting to ensure your system doesn’t turn on.
6. Carefully remove the faceplate of your
old thermostat.
7. Take a picture of your old thermostat’s wire
arrangement to reference later on.
8. Make note of the current locations of each
Warnings And Safety Information
Do not select COOL mode if the outside temperature is below
50ºF (10ºC). This could damage the cooling system.
