7
MCR34540
C
K
Rc
R
W-
O/B
Y
G
W2-
Aux/E
Y2
L
W
Y
G
R
C
1.6 Connect wires
Important!
C wire is required and
is the power source. Without a C wire,
your thermostat will not power up.
View the Alternate Wiring videos
at wifithermostat.com/videos
1.6a Starting with the C Wire, match
the sticky tag on the wire to the
terminal labels.
1.6b Straighten wire and gently slide
into terminal hole until it clicks
into place. (If you need to
remove a wire, use a pen tip to
press the terminal release and
then pull the wire out.)
Note:
Refer to the wiring picture
you took in Step 1.2.
Tip:
To make it easier to slide the
wire into place, use a pen tip to
hold down the terminal release.
Note:
The wiring for your application
might be different than the wiring
shown below.
Labels don’t match or have
heat pump system?
See
User Guide
.
Terminal release
Remove jumper loop ONLY if
you have both
R and Rc
wires.
EXAMPLE WIRING
Yours may look different
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