Hi,
I have recently purchased a Honeywell wireless thermostat (YTH6320R1015). Manual is here, page 4 is key:
I have split setup: A gas boiler in the basement (2-conductor thermostat wire). My relatively modern Bryant AC unit is in the attic. I therefore have two transformers. (For what it's worth, I've made sure they have the same phase.)
I would like to control both systems with my thermostat. Honeywell tech reps all agree that this must be possible, but give me contradictory instructions. After several exchanges they seem to come to an agreement that I might need a third transformer just to power the unit independently from the transformers in my systems.
Does that make sense or could there be an easier solution!
Many many thanks in advance!
Sam