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Zone Valves on Priority DHW.
ChasMan
Member Posts: 462
At present I have two zone pumps for five zones with valves and another pump for DHW. I am controlling priority by shutting off the zone pumps. The pumps all have IFC's. I have tried a number of things, swing checks, ball checks, messing with the piping. I hate flow checks at this point. They are all too noisy for my taste. So, I want to rewire the system.
My thinking is that if I shut the zone valves off on a priority DHW call, then I don;t need the flow checks in the zone pumps at all.
Is there a way to wire up a relay panel to do this or is it a roll your own kind of thing?
My thinking is that if I shut the zone valves off on a priority DHW call, then I don;t need the flow checks in the zone pumps at all.
Is there a way to wire up a relay panel to do this or is it a roll your own kind of thing?
0
Comments
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Taco
sr503 with optional priority?Nevermind, I have to read better.0 -
SR503
Yes, the SR503 is what I have with a few mods.. Im using the boilers reset control to do the priority since it also has DHW scheduling and thermostat as well. But even if I use the SR503 for priority, it still just has 24VAC constant on. What I was thinking was an extra set of contacts to cut 24VAC motor power to the valves on a priority call for heat. I guess it isn;t that hard to rig but it doesn;t appear to be SOP. I just want those flowchecks gone if I get a little ghost flow or gravity flow through the zone pumps I think I should be ok as long as the zone valves are closed. I worry about hammer though since the DHW pump will start as all the zone valves close at the same time.. Might be ok. I guess I will have to try it.0 -
We used what's called
a RIB relay once to prioritize one zone valve out of 4 for an indirect . A zone valve with normally open / normally closed contacts can do the same .
Personally I'd keep one circ for the indirect and one for the heat and make 'em run with a reset control . When we use zone valves with an IFC circ , we usually pop out the check .0
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