Zone valves on a Switching Relay
2 of those zone valves must be being powered by a transformer somewhere but not sure exactly where. 1 zone valve is being powered by the 24VAC output terminal on the switching relay. I'm wondering if I can power the 3rd zone valve from the air handler transformer itself (same one that is powering the thermostat), and rewire it so I can use the output on the 24v terminal to an outdoor reset.
Thanks for any input.
Comments
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How can you have 5 thermostats with 3 pumps and 3 zone valves, that makes 6. Unless two are running off of one thermostat? I guess I'm missing something.0
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Sorry I included the primary pump on the boiler. I have 2 other pumps and 3 valves for 5 zones.
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Is it normal to see zone valves connected to switch relays, or 5 zones connected to a 3 zone panel?
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If the zone valves are 120VAC they could connect to a switching relay. No end switch however
you can mix and match valve and pump relay boxes
Typically a zone valve needs to trigger on circulator when they open, so at least one pump could connect to the zone valve relay box
You don’t want to start mixing multiple transformers, it is not easily done, try to wire all of it to two relay boxesBob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
thanks Bob. that's what's so bizarre, these are 24v honeywell 4 wire zone valves. since they are 24v, i'm assuming 2 of the 3 are powered by the same transformer that is powering the thermostats (the ones in the air handlers). the 3rd one is being powered by the 24v output terminal on the switch relay.
is it possible to move the 3rd zone valve onto it's respective air handler transformer?
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Easy. 2 pump are powered by thermostatsHomerJSmith said:How can you have 5 thermostats with 3 pumps and 3 zone valves, that makes 6. Unless two are running off of one thermostat? I guess I'm missing something.
one pump is powered by any one of the three zone valves.
Zone valves don't move water... they just stop it from moving... pumps move water!
Edward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
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There is no "Normal" for your system when comparing to the world of possibilities. Your system is unique to your home/building. If I wanted to have 10 zones on one pump (back in the day before ECM pumps) I would be hard pressed to find a pump that could properly handle 30 GPM if all zones were open and 3 GPM if only one zone was open. But the B&G 100 series could do that with 15 GPM and 3 GPM with only a small change in head pressure. So I might decide to split the 10 zone valves into 2 sets of 5 zone valves, operated by a separate pump for each of the 5 zones. See the explanation on page 17 of this booklet. http://media.blueridgecompany.com/documents/ZoningMadeEasy.pdf.BigEHead said:Is it normal to see zone valves connected to switch relays, or 5 zones connected to a 3 zone panel?
There is a lot of basic information in this booklet. Easy to read and easy to understand.Edward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
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@109A_5 might get his SHORTS crossedhot_rod said:If the zone valves are 120VAC they could connect to a switching relay. No end switch however
you can mix and match valve and pump relay boxes
Typically a zone valve needs to trigger on circulator when they open, so at least one pump could connect to the zone valve relay box
You don’t want to start mixing multiple transformers, it is not easily done, try to wire all of it to two relay boxesEdward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
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Thanks all. Primary pump off the boiler pumps to all zones - 3 of these zones are controlled via zone valves. The other two zones are connected to their own pumps.
I'm not sure how the 2 zone valves are powered - but i know the 3rd is powered via the 24v output terminal on the switching relay. Would it be ok to remove it from there, and power it up directly from the air handler via the thermostats? I believe that's how the other 2 are connected. Thanks again.0
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