I have an Ultra-Zone EWC-ST-2E controller unit for my gas AC unit at home (heating and cooling). It is set for two zones. Where the first zone has to be on (heating or cooling) in order to enable to operation of the second zone.
Both zones have Honeywell TH3110D1008 thermostats with the following pins: W, Y, G, O Rc, R, B, C
The first zone has the following wires in: W, Y, G, O, R, B The second zone has the following wires: W, Y, G, O, Rc
Is a Nest 3rd generation thermostat compatible with this setup/system?
Below are images of the main AC controller diagram and snapshot, as well as wiring of both zones.
Lastly, can anyone also explain what are the different wires for/meaning?