ptwohey
New Member
I am upgrading my old heating system with a larger WM with a tankless that comes prewired with an aquastat with one zone and the ZC and ZR terminals for additional zones.
My question concerns the ZC and ZR terminals. What do they do? With the old system that had similar wiring, I expected that no zones would operate if the boiler water was not hot enough to trip the aquastat. What I found is that even when the oil gun was not operating and water was cold, the circulators would run.
I have a Taco multiple zone relay in addition to the factory to run 4 circulators and would hope to take advantage of everything the factory aquastat has to offer. I am not sure if I need a seperate aquastat for each relay.
Thanks, PT
My question concerns the ZC and ZR terminals. What do they do? With the old system that had similar wiring, I expected that no zones would operate if the boiler water was not hot enough to trip the aquastat. What I found is that even when the oil gun was not operating and water was cold, the circulators would run.
I have a Taco multiple zone relay in addition to the factory to run 4 circulators and would hope to take advantage of everything the factory aquastat has to offer. I am not sure if I need a seperate aquastat for each relay.
Thanks, PT