EFM 25 Pressure Cold.

 
shapechanger
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Post by shapechanger » Tue. Sep. 24, 2013 10:36 am

Why my EFM at 25 psi cold? What could be a possible reason? New Flow Valve New expansion tank...Any Ideas?


 
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tsb
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Post by tsb » Tue. Sep. 24, 2013 12:38 pm

Domestic Coil ?

 
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Post by fifthg » Tue. Sep. 24, 2013 1:27 pm

could air or debris like rust have gotten in to gauge to give a false reading?

 
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Post by franco b » Tue. Sep. 24, 2013 2:47 pm

Drain some water off and close the feed valve for a few days to see if the pressure then rises again. You have to eliminate things one by one. Only two places water can get in. Through the feed valve or domestic coil.

 
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Post by Sting » Tue. Sep. 24, 2013 5:45 pm

Because ....The gauge is bad :?:

 
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Post by waldo lemieux » Tue. Sep. 24, 2013 7:24 pm

My money is on a bad or stuck makeup valve.Drain some water out and Dial the valve back and see how high the pressure comes back.

 
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Post by shapechanger » Tue. Sep. 24, 2013 9:05 pm

We use rice coal. We replaced the flow valve. Gauge isn't bad because if I drain some water it goes to 15 but fills back up to 28 psi.


 
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Post by shapechanger » Tue. Sep. 24, 2013 9:06 pm

What is a make up valve?? Different from flow valve ?

 
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Post by whistlenut » Tue. Sep. 24, 2013 10:20 pm

Kinda the same thing, Pressure reduction fill valve,,,preset at 12 psi and usually has a small lever for 'fast fill mode'. The seat could be by-passing slightly, and the other is mentioned above: Domestic coil has developed a small leak, and it sees 'City Pressure' in both coil ports/ make-up, so there is a possible route to get more pressure into the boiler.
Remember that boiler vessel water mixing with domestic is NOT COOL! Like drinking out of a toilet....... :idea: :!:

There are lengthy discussions about this type of issue all over this forum, so feel free to do a search. :idea:

 
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Post by Sting » Tue. Sep. 24, 2013 11:03 pm

3 psi at the highest point in the system is all the pressure you need

if you have 3 psi at the top - Honey Boo Boo don't care if you have 6 12 or 22 at the bottom

but you have to have at least 3 PSI at the highest point of a closed wet system
the weight of the liquid below that 3 psi point - will determine what the system pressure at the boiler is while at rest or at work

fix your auto fill valve or valve it off- and adjust your pressure manually

 
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Post by shapechanger » Wed. Sep. 25, 2013 7:26 am

I don't have my hot water hooked into the system. Would the domestic coil still be the problem? Seems since we replaced the valve it has gotten worse. Does it matter if the pressure reducing valve is on the supply our return. Ours is on the return

 
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Post by waldo lemieux » Wed. Sep. 25, 2013 7:57 am

Make up water should go in at air separator and expansion tank,but itll work elsewhere. But it seems thats the problem.

 
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Post by GoodProphets » Wed. Sep. 25, 2013 8:27 am

I am sorta having the same problem.
I can pressure relief down to 10 psi, and then it will just rise and blow off repeatedly.

Had installer replace the auto fill valve and now we are testing the DHW coil.

We shut off the valve that connects the autofill to the boiler.
Pressure is holding steady.

Looks like it could be our town water pressure may be too high, and is actually pushing past the 12psi so it
keeps building up .... unsure just yet.
Still in testing mode (2 days in)

But I am not dropping pressure, so I hope that means the coil is still good and no leak.

Best way to check to see what happens is to close in valve that connects the fresh water off to the boiler.
Release pressure from the top relief valve down to 10-15 psi and then see what happens.

Are you heating now?
Let us know what exp tank you have and the size of your house.
You have a 520 stoker?

 
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Post by shapechanger » Wed. Sep. 25, 2013 12:13 pm

Yes it's a 520 if we shut the water of from the well and drain a bit out will stay at 10 to 15 psi. As soon as we turn it on back up to 28 30 psi. Going to replace the pressure valve this weekend. We are not heating I am afraid to light it. The system worked fine for 6 years now after getting a new tank and valve the pressure is too high.

 
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Post by shapechanger » Wed. Sep. 25, 2013 12:16 pm

Oh the tank is a water worker 5 gallon. Also its three story house 3000 square-foot


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