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3
Connect wires
1 Match each labeled wire
with same letter on terminal.
2 Use a screwdriver to loosen
screw terminals, insert bare
wires beneath screws, 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.
Mount thermostat base
1 Drill holes at pencil-marked
locations (3/16” holes for
drywall, 7/32” holes for
plaster).
[1] If wires will be connected to both R and Rc
terminals, remove metal jumper.
[2] Do not connect both O and B if you have a
heat pump. Connect only the O wire. Wrap
B wire with electrical tape and do not use.
[3] Do not use C, X or B. Wrap bare end of
wire with electrical tape.
Existing wires Connect to:
R • RH • 4 • V Terminal “R” [1]
Rc Terminal “Rc” [1]
O Terminal “O” [2]
B Terminal “B” [2]
G • F Terminal “G”
W • W1 • H Terminal “W”
Y • Y1 • M Terminal “Y”
C • X • B Do not use [3]
2 Use hammer to tap anchors
into holes until flush with
wall.
3 Pull wires through thermo-
stat base and insert screws.
Check level if desired, then
tighten screws.
