cuda67racer2 wrote:Thanks for the replies. I was attempting to bring the 110 out of the NO side of the S350, take it to the transformer and then the 24vac out of the transformer to the zone valve. Yes I am using the end switches to activate the circulator pump, so this way as long as a zone valve is open a circulator is on. I may just need to retrace the wires as they come to the zone valve, I may not have them parallel. Either scenario to the zone valve (override or thermostat) works fine independently but when they both attempted to come on at once that is when the thermostat smoked lol.
Thats where the relay comes in . You would still be isolating the thermosts from eachother . You could also get a 24 v relay . Just make sure you get the correct type . The transformer you are using is probably 24vac output . I will try my luck at drawing something that can be posted here . Dave