central heating help - pressure.

pingwing said:
To hijack the thread like a boss my self and my mum have made a huge mess of our heating system and need some help thinking how to fix it.

Basically we installed a new shower 2 weekends ago, which went swimmingly, but forgot to turn our gas boiler off whilst the water was off. So what I think has happened is that the boiler has tried to put pressure into the heating system from the mains water and just pumped a lot of air into it. Now we are stuck with the upstairs not heating up properly and the boiler not having any pressure in it for the heating :(

Is there a fix that I can do this afternoon as the bathroom is cold and sitting on a cold toilet seat makes the event less good....
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It sounds like you need to bleed the air out of the upstairs radiators. Have you tried that?
 
pingwing said:
Yeah I'll give that another bash as it's been really variable which ones needed bleeding
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You need to pressurise the system, bleed ALL the radiators the top it back up again. Repeat this a couple of times if necessary to ensure you have removed as much air as possible, then run the heating for a few hours keeping an eye on the pressure guage. You may then need another bleed and top up also don't forget to put some inhibitor in as with all this new water you are opening yoursel up to all sorts of problems with corrosion if you don't!
 
psd99 said:
I got this boiler called the inhibitor x100 sentinel.

The error message think it was e119.
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OMG, error message E119 :eek:

So you didn't get a letter about the critical part recall regarding the pressure relief valve !!?

It was a big news story in the US, the company went bankrupt after paying out compensation for all the fatalities :(

Here's what happens:



...btw, can I have all your stuff?
 
a1ex2001 said:
You need to pressurise the system, bleed ALL the radiators the top it back up again. Repeat this a couple of times if necessary to ensure you have removed as much air as possible, then run the heating for a few hours keeping an eye on the pressure guage. You may then need another bleed and top up also don't forget to put some inhibitor in as with all this new water you are opening yoursel up to all sorts of problems with corrosion if you don't!
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Ah I get you now, got it on whilst bleeding any radiator thats letting out air as we speak
 
Mr Men said:
will be fine :D

bleeding the radiators will probably drop the pressure
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This. Bleeding the radiators will reduce the pressure if your worried, but you'll need to catch the water in a bucket so best do it over a hard floor.

My pressure is normally set to about 1-1.5.

bitslice said:
OMG, error message E119 :eek:

So you didn't get a letter about the critical part recall regarding the pressure relief valve !!?

It was a big news story in the US, the company went bankrupt after paying out compensation for all the fatalities :(

Here's what happens:



...btw, can I have all your stuff?
Click to expand...

Lol :D
 
what i want to know is when do I bleed the air when the system is on or off? does it matter?

that is IF I need to bleed.
 
pingwing said:
Ah I get you now, got it on whilst bleeding any radiator thats letting out air as we speak
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I wouldn't bleed the system with it on if there is significant air in the system. You risk dropping the pressure to much which should cause it to cut out but if the cut outs fail it could cause damage to the boiler. You also risk a face full of very hot water and the pressure of the system needs to be set when cold.
 
excellent I will do it off then - start closest to the boiler?


first I will see on cold what number the bar is set to if it is 1-1.5 then I will turn on heating monitor make sure it doesn't get above 2.5
 
a1ex2001 said:
Not sure you understood me.

Your boiler should be between 1 and 1.5 bar when cold. When inoperation this should increase by between 0.25 and 0.5 bar so when operating your boiler should be bettween 1.5 and 2 bar (apporximately).

If the pressure is increasing significantly over 2 bar and more importantly not stopping rising then you have a fault on the system that will not be fixed by bleeding your radiators (This could infact make the problem worse as any air in the radiators will be acting as an expansion vessel). The most likely cause of this behaviour is a faulty expansion vessel but there are others.

Follow my previous advice to work out what is actually happeneing, preesurise the system to bettween 1 and 1.5 bar and then run the heating while watching the guage if it goes up bettween 0.25 and 0.5 bar and then settles out you are ok if it increases more than this an doesn't appear to be stopping you have a problem that needs investigation. You system should not blow up once you get over about 2.5 bar the preesure release valve will start to leak and if you get near 3 bar it will vent water rapidly.
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this thanks :)
 
a1ex2001 said:
I wouldn't bleed the system with it on if there is significant air in the system. You risk dropping the pressure to much which should cause it to cut out but if the cut outs fail it could cause damage to the boiler. You also risk a face full of very hot water and the pressure of the system needs to be set when cold.
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Yeah given up on the assumption that there's too much air in one of the bathroom towel racks to get this working properly.

Going to get mum to call out someone sensible who can fix it...
 
pingwing said:
Yeah given up on the assumption that there's too much air in one of the bathroom towel racks to get this working properly.

Going to get mum to call out someone sensible who can fix it...
Click to expand...

If it's just air turn it off and keep bleeding, topping up as necessary don't be paying someone to bleed your radiators.
 
bitslice said:
OMG, error message E119 :eek:

So you didn't get a letter about the critical part recall regarding the pressure relief valve !!?

It was a big news story in the US, the company went bankrupt after paying out compensation for all the fatalities :(

Here's what happens:



...btw, can I have all your stuff?
Click to expand...


I was expecting a rickroll tbh . . . . :D


a1ex2001 said:
If it's just air turn it off and keep bleeding, topping up as necessary don't be paying someone to bleed your radiators.
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And this. Its the single easiest thing there is to do. Use bleed key. Twist anti-clockwise. Listen to hissing hoise. When hissing noise stops, and water comes out. Close it up. Its that simple. Do all the radiators. If required, add the pressure lost back into the system.
 
No need to worry the boiler has a pressure release valve inside that will release pressure when it reaches to 3.0 bar,

And X100 is inhibitor for the heating system
 
a1ex2001 said:
If it's just air turn it off and keep bleeding, topping up as necessary don't be paying someone to bleed your radiators.
Click to expand...

Yep an intelligent conversation with mum has had us work out which one is the inlet valve and we've got it back on the right tracks with no need to pay someone to sort it out :)
 
Whats the deal with the pressure going down over time. How are you able to tell if it a leak or just the usual pressure drop that happens on most systems? Or is it not meant to drop over time?
 
thanks guys well let me tell you what has happened to far

got home system off and cold pressure bar was at 1.5

when I turned the heating on the pressure went up to to 2 and then it started to hit 2.5 and just about to get into the red

I then turned the heating off - I should bleed the radiators next when the system is cold
basically I'm going to try aim for 1.0 for when the system is cold/off that should do it hope it works.
 
CRUMPLYPORK said:
No need to worry the boiler has a pressure release valve inside that will release pressure when it reaches to 3.0 bar,

And X100 is inhibitor for the heating system
Click to expand...

so say it gets to 3.0 then will the heating turn off automatically and how much pressure will be released?

what I want to know is how dangerous can this be?

that's what worries me
 
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