26
INSTALLING THERMOSTAT WITHOUT A C WIRE (CONT.)
3. Disconnect the thermostat wires
If you’re using 4 wires, carefully disconnect the W/W1, G, Y/Y1, and R
wires from the control board terminals. [Figure 3.3]
Note: If you’re only using 3 wires, you will only need to disconnect
the G, Y/Y1, and R wires.
Figure 3.3
To Thermostat
Control
Board
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