Zone 3 on boiler heats slowly

[voletl]

Its an old photo. I didn't want the system on at that time.

Got it

 

[Diehard]

Which taco 007?
their are 4 different types with 4 different head pressures

from 5' to 20'+/-


anti freeze [ glyco] keeps the system from freezing up

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?

 

[Diehard]

When the pump is off
and the psi of the system is not high enough to maintain [head] water at the top of the zone
the water will be replaced by thousands of bubbles that turn into one big ass air lock
The air is caused by the pump turning
so YES, PSI does matter in a closed system

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 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]

Pump is Taco 007. Do i need a larger pump for the loops with more head? Zone 3 is the top floor. That's hard to say at this point. The added head loss would be the results the additional length of piping and fittings. Plus an added amount if it's filled with a 50/50 mix of glycol antifreeze.

Distance from boiler to highest loop is about 17 feet. The reason I asked for this height was to estimate the approx. increase in pipe lengths over the other 2 zones and to make sure it didn't exceed the recommended pressure setting on your system,

 

[Diehard]

When 2 zones are off and one is on, does the pump force the water to only flow through its loop or does it circulate around the 3 loops going to the path of least resistance?

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?

 

[frodo]

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".

google is your friend, try using it

View attachment 23364
I guess I should have asked, is the entire system subject to freezing and filled with a glycol mix?

 

[Diehard]

Sounds like a cop out.

 

[Diehard]

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?

 

[Diehard]

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