Instructions / Assembly
TIP: The wiring on your old thermostat may look dierent—
just check to see if there’s a C wire.
YES NO
RC RH
RC RHRC RH
RC RH
9 10
STEP 4
Take a picture of the wires connected to the terminals of
your old thermostat. You may need to reference this photo
later on.
WARNING: ecobee is designed for 24VAC with a 2A maximum current.
Do not connect it to line (high) voltage or millivolt systems.
CHECKPOINT: C WIRE
Do you have a C wire connected to your old thermostat?
Great! Continue
to the NEXT PAGE.
Go to PAGE 24 to
install with a PEK.