Ideal Isar High Pressure Guage

[safeplumb]

Hi Guys can you help,

I had to recently drain down my Ideal Isar HE24 boiler to fit a new drain off tap on the heating return pipe which was leaking. Refilled and everything is working fine except for the pressure guage which reads 3 bar when the heating is running, when the heating goes off it stays at 3 bar. If I drain out some water till the pressure guage reads 1 bar and then rerun the boiler the pressure guage eventually goes up to 3 bar again and stays there when the heating goes off. Did not have this problem before I drained down to fit the drain off tap. Any ideas?

Cheers Al

 

[SimonJohns]

Sounds to me like you filling loop is passing

 

[diamondgas]

:iagree: as above

Disconect the loop and see if it's passing, you want to hope it is to be honest

 

[jncalderc]

I would say it needs the expansion vessel recharged the only reason it is stopping at 3 bar is because the PRV is working properly.

 

[diamondgas]

I would say it needs the expansion vessel recharged the only reason it is stopping at 3 bar is because the PRV is working properly.

If it were the exp vessel the pressure would go down when the heating cooled would it not? The exp vess theory does not explain how it rises to 3bar and stays there alas! There may be an issue with the exp vess but that'd have nothing to do with why the pressure is returning to 3 after the pressure is dropped as the op has mentioned. Would you agree?

 

[jncalderc]

I have seen the pressure going to 6 and the PRV opening to allow the release. It will only go back to 3 and sit there because thats what the PRV is set to. I, in my opinion would open the valve and recharge it anyway and that would let you see immediatley if the Vessel is faulty.

 

[jncalderc]

Of course the loop is a very valid and probable possibility. cant see the trees for the fuzz caused by last nights beer!!

 

[SimonJohns]

I have seen the pressure going to 6 and the PRV opening to allow the release. It will only go back to 3 and sit there because thats what the PRV is set to. I, in my opinion would open the valve and recharge it anyway and that would let you see immediatley if the Vessel is faulty.

I would of said that by doing that you stand a higher risk or tearing the diaphragm

There is deffo a passing valve or a broke plate he

Your theory is wrong.

 

[jncalderc]

I meant open the PRV valve and recharge the vessel but as the guys have said it is most likely a passing loop.