Integrating low and line voltage zones

Dan Peel

I don't have a direct answer but when in doubt I throw in a relay to be sure of a dry contact. Pretty cheap insurance. Enjoy.....Dan

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Unknown

On our jobs with

a main zone that's low voltage and a 2nd zone that is line , I like to break the line volt zone somehow through the low limit because most of our boilers use a coil . I normally do this by powering that zone from ZC of the 8124A aquastat . But that zone will not kick the aquastat to it's high limit . I was wondering what would happen if I power the line voltage zone from ZC , up to the thermostat - then it would come back down and power the circulator , as well as power ZR of the aquastat to kick the temp to the high limit . Would this work ? Or might it back feed into the low voltage zone ? Thanks for any help .

Unknown

Yeah , we do that too

if theres multiple zones and most of them are low voltage . Pretty easy to knock the line volt zone down with a multizone relay .

But we have this particular wiring setup in alot of homes - one line , one low . Thanks Dan .

Dale

Wiring

If you go to the 120v zone stat from ZC bring 120v back from the stat to ZR and I guess C1 wouldn't you be running the pump if the 120v zone called and the low limit was still R to B? I think you probably want to leave the pump off while your coil needs heat. The other thing, although it will work, I like to feed stats from only one side if possible to avoid confusion and I think it's safer for someone else.