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Quick Installation Guide
Wiring—conventional systems
Alternate wiring (conventional systems)
If labels do not match terminals, connect wires as shown below (see notes, below).
NOTES:
1. If you must connect both R and Rc wires, set the R Slider Tab to the down
position (2 wires).
2. If your old thermostat had both R and RH wires, set the R Slider Tab to the
down position (2 wires). Then connect the R wire to the Rc terminal, and the
RH wire to the R terminal.
3. If your old thermostat had only 1 C or C1 wire, connect it to the C terminal. If
your old thermostat had 2 C or C1 wires, wrap each separately with electrical
tape and do not connect them.
S
S
or Y1 or M
Y
Y Y
2
or F
G
C1 X B
or or or
3 C
U
U
A
L/A
O/B
W
2
AUX
E
or W1 or
W
K
R
or
R
or RH or
Rc
20
H
2
2
4 or V