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PostPosted: Wed Feb 16, 2011 5:33 pm 
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HI

I recently had an Ideal Logic 30+ combi boiler fitted as a replacement.Since the installation the boiler pressure has slowly risen from 1bar to 2bar, and I have to vent the rads every 3/4 days to get rid of air, once went to nearly 3bar, this time I had to vent the rads to reduce the pressure.
The rads also become noisy when they require venting(2 of the 5 rads never need venting,there are 2 upstairs and 3 downstairs, 4 are fitted with TRVs)

The installer was called back but left scratching his head.

The boiler is under warranty but I'd like a bit more info. before calling them out.
Any help would be much appreciated

Thanks
Tony


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PostPosted: Wed Feb 16, 2011 5:58 pm 
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What type of system open vent or sealed.



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PostPosted: Wed Feb 16, 2011 6:02 pm 
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Scruff it's a combi boiler at 3 bar what sorta system do you think it might be :roll: :lol:

Haven't fitted a Logic although I haven't heard terrible things about them it'll be a long time before hey put their reputation behind them.

Has it got a built in filling loop or an external one? I'd expect to find the filling loop passing water into the system somewhere.

The only way I would expext air to get in their would be from corrosion was the system flushed?

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PostPosted: Wed Feb 16, 2011 6:09 pm 
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Razor wrote:
Scruff it's a combi boiler at 3 bar what sorta system do you think it might be :roll: :lol:

Haven't fitted a Logic although I haven't heard terrible things about them it'll be a long time before hey put their reputation behind them.

Has it got a built in filling loop or an external one? I'd expect to find the filling loop passing water into the system somewhere.

The only way I would expect air to get in their would be from corrosion was the system flushed?


A tall building :lol:

I was thinking about the air, more than the boiler.

Don't sound to good.


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PostPosted: Wed Feb 16, 2011 8:36 pm 
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Make sure the filling loop is shut both ends, or remove it, but i think it is built in on these.

Stupid question, but did the installer remove any old filling loop that may have been fitted, as this could be letting by.

If that is ok, all I can think of is the plate HE has a pin hole in it.

I quite liked the look of these at the Ideal product/go kart evening a while back.

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PostPosted: Thu Feb 17, 2011 3:54 am 
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You never told me about any go-cart evening, Dave.

I went to Spain a long while ago with my wife on a package and we surprised the tour because we both won the go-cart competition.

[ When I say we both won, of course I mean that I won and she came second, the rest came behind us ]

There is a very simple reason why we won and thats because I sussed out a simple fact whilst watching and told her about it.

Tony



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PostPosted: Thu Feb 17, 2011 3:55 am 
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Razor wrote:

Scruff it's a combi boiler at 3 bar what sorta system do you think it might be :roll: :lol:



I was just about to say an open vent in a nine story building but Scruff told you first!


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PostPosted: Fri Feb 18, 2011 7:22 pm 
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Razor/thescruff/gas4you/Agile

Yes it does have a filling loop built in - I've removed it and fitted the screw-on caps back ,still the pressure increases :scratch:
I don't know if the system was flushed or not.
Prior to the boiler being changed I didn't need to vent the rads very often.
One other thing I forgot to mention is that when DHW is called for there is water dribbling from the flue,I know it's cold but this happens when the heating has been running,I would have thought that the flue would be warm enough for steam not to condense??

The man from Ideal is coming on Monday,maybe he will sort it.

I'll report back his findings if it's of interest to you

Thanks
Tony


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PostPosted: Fri Feb 18, 2011 7:45 pm 
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Is the pressure rising when the boiler is off.

Always interested in the end results.


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PostPosted: Fri Feb 18, 2011 8:22 pm 
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The flue outside should be horizontal or just sloping slightly back to the boiler.

Which way does yours slope?

Did the installer complete the Benchmark?

Tony


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PostPosted: Fri Feb 18, 2011 11:10 pm 
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thescruff and Agile

Yes the pressure rises when the boiler is off.I don't know if the flue is horizontal or sloping back slightly,it looks horizontal, and yes the installer completed the Benchmark

Can't thank you enough for your prompt replies,much appreciated

Tony
ps thescruff
If you mean by OAP your retired - me too!


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PostPosted: Fri Feb 18, 2011 11:13 pm 
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Don't feel like retired, I do more work now for nothing than I did for wages when I was working :roll:

Sounds like you have a leak between the hws and htg. if the filler is disconnected.


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PostPosted: Sat Feb 19, 2011 12:53 am 
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There is a mains water isolating valve under the boiler. Turn ON a hot tap and leave it open. It should stop dripping after a few minutes.

Reduce the system pressure with a rad bleed screw down to 1.0 Bar when the heating system.

Leave it off for a few hours and then turn off the heating until it cools.

If there is no rise then it would seem to be a leak inside the boiler.

Tony


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