2
ITEMS YOU’LL NEED FOR
INSTALLATION
A.
Pencil
B.
Phillips screwdriver
C.
Small flathead screwdriver
D.
Drill with a 3/16” drill bit
A.
C.
D.
B.
A150218
Tip:
Review all the instructions before you
start to help ensure that there are no surprises
during installation
Step 1 — REMOVE THE COVER FROM YOUR
OLD THERMOSTAT
1. Most covers snap off easily but some are attached by
screws. Remove the cover of your thermostat.
2. Note if either of the following apply to your old thermostat:
a. If you do not have a wire connected to C, two alkaline
AA batteries required.
b. If you find that you have additional wires labeled any-
thing other than Y, C, R, G, W, O/B – STOP and review
to see if this model thermostat is compatible with your
system
Y C R G W O/B
A150240
3. Reattach the cover of your old thermostat. You’ll use Step 2
to confirm the power is disconnected.
!
Warning!
If your old thermostat is labeled
110V or 120V, or is connected by thick wires
and wire nuts, it is a high voltage system and is
not compatible
Step 2 — POWER OFF YOUR HEATING AND
COOLING SYSTEM
1. Turn off the power to your heating and cooling system.
S
You can do this either at your circuit breaker box or a
switch at your indoor furnace or fan coil.
S
Most systems have one switch but some systems have
two switches.
2. Make sure your system is without power by using your old
thermostat to adjust the temperature. Your system should
not turn on.
or
A150046
!
Warning!
Electrical operation hazard. Failure
to follow this warning could result in injury,
death, or equipment damage.
Step 3 — REMOVE YOUR OLD THERMOSTAT
1. Remove the cover of your old thermostat.
2. Using your old thermostat as a guide, record wire color and
corresponding letter where it is connected on the thermostat
terminal block. Don’t worry about any non- connected
wires .
Wire Color
Connected to Terminal
Letter
Green
G
Tip:
Take a photo of your old thermostat wiring
with your smartphone for reference later.
3. Disconnect each wire. Most thermostats’ wires are connect-
ed using screws; simply loosen each screw with a small
screwdriver. Be careful not to let any wires fall back into the
wall.
4. Discard any jumper wires or brackets between Rh, Rc, or R.
A150219
5. Remove your old thermostat base by unscrewing it from the
wall.
Step 4 — INSTALL YOUR CARRIER
®
THERMOSTAT
1. Separate front display and mounting back plate of thermo-
stat.
