EQUIPMENT INSTALLATION
3
Using the provided labels, mark each wire one at
a time with the correct letter corresponding to
its current placement on the existing thermostat.
With all the wires labeled, remove the wires
from the thermostat.
4
Determine if the existing system has a “C-Wire.”
The C-Wire is the “common wire” or one leg of a
24vAC transformer that is usually located inside
the HVAC unit. If your home DOES NOT have an
existing C-Wire (B-Wire on a Trane System)
already connected at the existing thermostat,
then the batteries will power the thermostat
for approximately 1 year before needing to be
replaced.
5
Remove the existing thermostat. Re-connect all
the wires on the new thermostat, matching the
labels with the corresponding screw terminals.
If you ran your own C-Wire (power wire),
connect one wire to the C terminal and one wire
to the RH terminal.
G
C
Y
RH
W
2.6"
From furnace
2
If the wires are in
danger of falling
back inside the
wall, wrap a
screwdriver or
pencil around
them to prevent
this from
happening.
Labeling Tip
C
G
W
The thermostat comes with a small jumper between
RC and RH. If the existing thermostat DOES NOT
have a similar jumper between RC and RH—or if there
is a wire in RC and another in RH—remove the jumper
from the new unit as well. Otherwise leave it in.
If you are running your own power wire, connect one
leg to C and the other to RH (no polarity).
Jumper Tip
Jumper wire
Y2 RH RC G A
C
Y
RH G
C
Y
RH G
Connect Wires
Position Wires
for Mounting to Wall
