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Connect Wires - Honeywell CT31 Owner's Manual

Low-voltage thermostat
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Owner's Manual
Mount thermostat base
1 Drill holes at pencil-marked locations (3/16" holes for drywall, 7/32" holes for plaster).
2 Use hammer to
tap anchors into
holes until flush
with wall.
3 [Optional] Pull
wires through
cover plate (if
needed to cover
marks left by your
old thermostat).
4 Pull wires through
thermostat base
and insert screws.
Check level if
desired, then
tighten screws.

Connect wires

1 Match each labeled wire
with same letter on terminal.
2 Use a screwdriver to loosen
screw terminals, wrap bare
wire securely around termi-
nals, then tighten screws.
3 Push any excess wire back
into the wall opening.
Labels don't match?
If labels do not match letters on
thermostat, see table below.
Existing wires
R
RH
4
V
W
W1
H
Y
Y1
M
G
F
Rc
Optional cover plate
Connect to:
Terminal "R"
Terminal "W"
Terminal "Y"
Terminal "G"
Stop! See note
If this wire is present, you cannot use
this thermostat with your system. See
page 2.
4
Thermostat base

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