EWC Controls Forum

I configured as I had originally described, but wired the original system W to new W2/E rather than W1/B. Everything appears to be working fine - the system is ultimately controlled by master thermostat 1, though my other 2 zones may call for heating / cooling as before. I did notice that the ...

I'm swapping thermostats from White Rodgers 1F97-1271 to Sensi WiFi thermostats, and verified that my best bet was to perform a board upgrade from my EWC-ST-3E to an NCM-300, specifically so that I can gain a C wire to power the stats at the wall. I have an American Standard Freedom 90 Single Stage ...