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Zone 3 on boiler heats slowly
- Thread starter jonblu
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Diehard
In Remembrance
I didn't look any further than a 007. There are different capacities?
Please provide the info on the "4 different types with 4 different head pressures".
I guess I should have asked, is the entire system subject to freezing and filled with a glycol mix?
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Diehard
In Remembrance
Sounds like you misunderstood what I was saying.
But like I said, "The typical 12 psi+/- setting on your PRV is equivalent to approx. 12 x 2.31 equals over 27 feet elevation head."
So I think it's safe to say that 12 psi would be adequate pressure for a 17 foot high application.
Diehard
In Remembrance
In a closed loop the circulating pump is not capable of pumping anything above what it says on its curve sheet. For example, in the sample I included above, the oo7 shows zero flow at just under 10 FEET of head. So the pump is not capable of generating a pressure above 10 feet. That's part of the reason it's referred to as a circulator. It doesn't have to be capable to pump up to the maximum elevation of the highest zone.
Diehard
In Remembrance
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Diehard
In Remembrance
It is assumed that if you are calling them 3 zones, together with the fact that you have 3 separate circulators, that you have individual thermostats for each. That would pretty much say that the 3 zones are not interconnected.
Are you aware of any interconnections between the zones?
I personally can't make heads or tails of how that system is piped, even in the area of those pictures you included.
I may be a good idea to have a professional come in to help you to understand how the system is set up and what, if anything, may be impacting your problem. After you have made sure you vented all the air out, first.
Come to think of it, I don't recall you answering these questions.
It must be assumed that having 3 circulators for 3 zones, that each zone is separately controlled by its own thermostat. So how do you compare the difference in how fast or slow they heat up?
Do you have air vents at all the radiators?
You say you "... tried making zone 3 the priority loop and still no strong heat." How did you do that?
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Diehard
In Remembrance
Sounds like a cop out.
Diehard
In Remembrance
How about the subject of the circulator not being able to add more pressure to a closed loop that already exceeds the circulators maximum pressure capabilities?
If you don't understand something it's not a big deal. Why do I get the feeling i'm being attacked, at times?
If you don't understand something it's not a big deal. Why do I get the feeling i'm being attacked, at times?
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Diehard
In Remembrance
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