Vaillant turboMAX pressure in the red area.

[David937]

Hello,

My Grannies boiler is having a slight problem at the moment, when the heating is on the pressure goes all the way to just before 3 bar, the pressure relief valve is not lifted.

I went to check up and checked the filled loop is closed, then I bled water out of a radiator until the pressure was back to 1.5 bar.

I can't really give you a proper problem description because I only went to release the pressure in the fear of the PRV being lifted.

The heating and hot water works perfectly.

What is causing this severe pressure rise?

 

[gas4you]

Search FAQ's for checking the expansion vessel.

 

[David937]

I have had a look at the FAQ, I reckon the expansion vessel needs pumping up.
I am not going to try this because I am only 13. Before you say "I thought you have a four year old son", the post which mentioned him was written on behalf of my father.

//www.diynot.com/forums/viewtopic.php?t=154542

 

[ChrisR]

I am only 13

You can do it with a bicycle pump! Needs the larger, car sized end on the flexy bit.

 

[David937]

Honestly I don't want to tamper with it because if anything goes wrong I will get the blame!

 

[David937]

Who reckons it actually is the EV?I will be able to a full diagnosis on Thursday or Wednesday.

 

[gas4you]

Who's posting now

 

[David937]

I am a 13 year old.

Since I was around 8 years old I have been very interested in HVAC, I have done a lot of research since then and have come a long way. I want to become a Gas engineer who installs things like weather compensation, every engineer we called to do our heating advised against it. The engineer that we got to do our heating said:

"Run the boiler at 82 degrees"

I said:

"It won't condense much then will it"?

He said:

"As long as you have your 11 degree diffrential it will condense"

What rubbish.

 

[MrFreeze]

This might sound stupid but my friend had the same problem. It turned out the the loop filling valve wasn't closed properly and the kept increasing the pressure slowly over a period. worth a check

 

[Steve69the69Gas]

Good on yer son -- keep it up.

You may be the ONE to take over when Agile (Tony) packs it in

 

[MrFreeze]

I have no wish to take over Agile Tony's good work, he was one of the few who bothered to advise me on my boiler problem.

I'm no expert, I wouldn't be on this forum if I was. My post was genuine and sincere, should have said the valve was faulty instead of not closing properly. . . .

 

[twgas]

I have no wish to take over Agile Tony's good work,

I think he meant young david

 

[David937]

I am only 13

You can do it with a bicycle pump! Needs the larger, car sized end on the flexy bit.

After bleeding out water everything seems to be working fine.
I think it might have been my fault, because I had bled a few radiators and pressurised to 1.2 bar cold. I didn't realise the pressure rises so much when turned on. The pressure is now how it used to be at 0.8 to around 1.0 bar cold. 2 bar hot pressure. I think the pressure rises so much because of the huge radiators.