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4.3b Installing the LUX Power Bridge on Heat Pump Systems
Current Wiring:
After Set Up:
If your system provides a second stage of heating, you may have a W2 wire. You can leave this wire as-is in your furnace and
connect it to the W2 block on your new thermostat.
You may or may not have a W1 terminal block on your control board. Do not connect the Power Bridge’s “W” wire to any
terminal block on your control board.
Connect your old Y wire to the empty hole next to the blue end of the y-splitter (1). Snap the orange lever shut to secure the
wire in its place. Insert the yellow end of the y-splitter into the thermostat’s Y terminal and the green wire into the G terminal.
Move your old G wire to the C terminal on your thermostat.
2
3
4
Y
G
R
W1
W2
C
Power Bridge
O/B
Y
Rc
Rh
W1
W2
C
G
Y
C
G
R
(1)
W
1
BO/
Thermostat
Thermostat
Air Handler
Air Handler
Y
R
W1
W2
C
O/B
Y
Rc
Rh
W1
W2
C
G
G
BO/
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