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Use blue wire to connect on C at air handler and thermostat. :thumbsup:

I installed 3M-50 today.....very nice btw


When you have everything setup check this website ==>http://www.thermostatmonitor.com/
 

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Yes, Shut off air handler connect all the wires. To test do not install the batteries. Turn on air handler, the thermostat should be energize. Turn off again and install the batteries. You are ready to setup the wi-fi.
 
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