Can anyone please cite any specific models that will work in this application? The only one I've been able to determine by poking around on the net is the White-Rodgers IF75D, but that doesn't seem to be for sale anywhere. TIA for any comments
Steve L.
Yes, good advice. It is also known as an isolating relay.
I have the same incompatibility issue with three-wire Taco zone valves.
Can anyone tell me if the coils of the isolating relays should be powered by a second 24v transformer? Does it make a difference whether I install battery powered or 24vac powered thermostats? Are there relays designed specifically for this application?
George Elkins
Hi S.L., hope you are having a nice day
On 06-Nov-03 At About 22:00:43, S.L. wrote to All Subject: Programmable thermostat for 3-wire w/zone valves?
S> From: "S.L."
S> Can anyone please cite any specific models that will work in this S> application? The only one I've been able to determine by poking S> around on the net is the White-Rodgers IF75D, but that doesn't seem S> to be for sale anywhere. TIA for any comments
You can use any thermostat you want. just use a relay to operate the valve. if you don't know how to do this call someone who does to do it for you.
-=> HvacTech2
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