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Install your thermostat
without a C wire
If you don’t have a C wire ,you will need to use the Electric Control Module
included to reliable power your thermostat.
CHECKPOINT: 3 OR 4 WIRES
√
The Electric Control Module requires your system to have either of the following:
4 wires W/W1,Y/Y1,G,and R(or RC or RH)
Do you have these wires?
YES
Great, please continue
to the NEXT PAGE.
NO
Please check compatibility
or contact us!
RC RH G Y W C RC RH G Y W C
The Electric Control Module
will work with your system!
3938
(Optional 4 to 5 wires)
A1
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