I've added a radiant zone to my existing boiler (peerless mc series, baseboard, single circulator with 2 taco zone valves). My radiant zone uses a WattsRadiant manifold and Isotherm assembly, T'd off my main loop.
Problem is, I neglected to realize that the main loop circulator is only running when one of the two existing zones is calling (and without it, the radiant zone gets no heat).
I think I know the solution, and its pretty easy mechanically, but I'm not sure how to execute electrically:
If I add a 3rd zone to the boiler (a "bypass zone") with a zone valve, then when the radiant floor calls, I need it to OPEN the bypass zone valve and turn on the circulator ONLY WHEN both other zone valves (1 & 2) are OFF. Similarly, if bypass zone is ON (meaning radiant zone is calling and 1&2 were OFF), and 1 or 2 calls, it would need to SHUT the bypass zone valve.
(This is easier to draw than to explain...).
Anyone know how to do this?? I think I can do this with a couple of SPDT relays, not sure if there is an easier way. (Ie, run each of the existing zone valve's power through a SPDT relay with power to the bypass zone going through the NormClosed contacts of the relay.)
Help! Its winter here, need to solve this asap...
Problem is, I neglected to realize that the main loop circulator is only running when one of the two existing zones is calling (and without it, the radiant zone gets no heat).
I think I know the solution, and its pretty easy mechanically, but I'm not sure how to execute electrically:
If I add a 3rd zone to the boiler (a "bypass zone") with a zone valve, then when the radiant floor calls, I need it to OPEN the bypass zone valve and turn on the circulator ONLY WHEN both other zone valves (1 & 2) are OFF. Similarly, if bypass zone is ON (meaning radiant zone is calling and 1&2 were OFF), and 1 or 2 calls, it would need to SHUT the bypass zone valve.
(This is easier to draw than to explain...).
Anyone know how to do this?? I think I can do this with a couple of SPDT relays, not sure if there is an easier way. (Ie, run each of the existing zone valve's power through a SPDT relay with power to the bypass zone going through the NormClosed contacts of the relay.)
Help! Its winter here, need to solve this asap...