Powermax 155x pressure problem

[sharky77]

I've recently moved into a house which is about 3 year old. The pressure gauge was reading about 1 bar until some stupid relative said this wasn't right and did something to raise the pressure to 2 bar. after that the pressure gauge was fluctuating anywhere between 3 bar and below and would regularly drop so far to "lock out". I was told to keep refilling it to bring the pressure back up. Whilst this did work it "locked out" quite often. Then, all of a sudden it stopped locking out and now fluctuates over 2, sometimes as high as 3.5 bar. I've also noticed that a pipe which comes out of the house into the garden (not into a drain) has started leaking water.

Firstly is the leaking pipe related to the pressure problems and secondly any ideas how to maintain a "good pressure" on this boiler and to stop the leak. HELP!!

 

[ollski]

yes you were probably low on air pressure in the expansion vessel, so raising the cold pressure to 2bar would have blown the pressure relief valve at 3bar when up to temperature. The leak is the pressure relief valve which needs either a strip and clean or replacement. The valve blows at around 3 bar releasing pressure and then when it cools it will drop further to below the minimum for the boiler to operate, hence your lock out.

 

[Agile]

Ollski correctly diagnoses the problem but forgets to tell you what to do!

Drain the water out until the pressure reads zero then pump up the air valve on the expansion vessel until the pressure reads 2 Bar then let a little more water out until it falls to 1.5 then start using the boiler as normal.

Thats a quick fix not the full procedure an engineer would follow.

Tony Glazier

 

[ollski]

Ollski correctly diagnoses the problem but forgets to tell you what to do!

par for the course from me I'm afraid

 

[chrishutt]

ollski, why have some of your smileys stopped hammering? Is it some sort of industrial dispute? Is it likely to spread?

8.48 pm - now they're hammering again... Maybe it's just me.

8.52 pm - now they've stopped again .... anyone else notice this?

 

[ollski]

ollski, why have some of your smileys stopped hammering? Is it some sort of industrial dispute? Is it likely to spread?

8.48 pm - now they're hammering again... Maybe it's just me.

8.52 pm - now they've stopped again .... anyone else notice this?

Chris, you know its Friday night ....or did you start waaaaaaay early