Non-motoring > Combi boilers and radiator bleeding. Miscellaneous
Thread Author: R.P. Replies: 15
View Threaded 

 Sun 6 Nov 11 10:37 
 Combi boilers and radiator bleeding. - R.P.
Reading a very comprehensive Housing Association "Repair Guide" booklet the other day - the section that covered Central Heating clearly said that if a Combi is fitted that radiators should not be bled and it went on to describe how Combi boilers have low pressure dials etc.

Any views ?
Reply to this message | Report message
       
 Sun 6 Nov 11 10:46 
 Combi boilers and radiator bleeding. - AshT
I've got a fairly new Worcester boiler here RP, and I went round bleeding the system a few weeks ago when I started the heating for the first time this Autumn, as I did last year without any problems. The engineer who serviced it in the Summer certainly didn't mention not bleeding it.

The boiler's got a pressure dial, and also has a valve you can use to add water to the system to raise the pressure.
Reply to this message | Report message
       
 Sun 6 Nov 11 10:47 
 Combi boilers and radiator bleeding. - Zero
They can be bled, and indeed may have to be bled from time to time (tho less likely than a gravity system) . One simply tops up the pressure again afterwards if its dropped.
Last edited by: Zero on Sun 6 Nov 11 at 10:48
Reply to this message | Report message
       
 Sun 6 Nov 11 10:51 
 Combi boilers and radiator bleeding. - Fursty Ferret
^^ Wot he said.
Reply to this message | Report message
       
 Sun 6 Nov 11 11:21 
 Combi boilers and radiator bleeding. - R.P.
I thought it was a bit odd. This book was very well written though, plain English with line drawings - basically telling tenants what they were responsible for and what the Association is
Responsible for and to aid the fault reporting process. Just that odd comment that seemed odd
Reply to this message | Report message
       
 Sun 6 Nov 11 12:19 
 Combi boilers and radiator bleeding. - Dog
Still summer down ere so not put the eating on, yet!

Combi is a first for me, always had the old type broiler before now,

I do check the ole gauge from thyme 2 thyme though, to make sure it reads 1 bar,

So, this is what i'd do if I fort me rads needed a blimming bleed ~

www.ehow.com/how_4966643_bleed-radiator-combi-boiler.html

Even a Mastermind (like moi) can managed that ;}
Reply to this message | Report message
       
 Sun 6 Nov 11 15:20 
 Combi boilers and radiator bleeding. - Stuu
I bleed my radiators and, assuming the top-up valve hasnt seized like last time, I add water back in if pressure drops too much.

No worries.
Reply to this message | Report message
       
 Sun 6 Nov 11 15:41 
 Combi boilers and radiator bleeding. - Runfer D'Hills
>>Reading a very comprehensive Housing Association...

All rock 'n roll that being retired lark eh?

:-))
Reply to this message | Report message
       
 Sun 6 Nov 11 17:09 
 Combi boilers and radiator bleeding. - R.P.
I was actually working - a few days agency work, I was bored, believe me but it pays the dogs' Bonio
Reply to this message | Report message
       
 Mon 7 Nov 11 13:04 
 Combi boilers and radiator bleeding. - Snakey
I've bled mine once or twice in the 4 years since I had a combi installed.

What worries me is the the boiler seems to need topping up every few months as the pressure gauge drops below 1bar. I can't see any leaks and when I top up none of the radiators seem to need bleeding!

Does it evaporate somewhere?!
Reply to this message | Report message
       
 Mon 7 Nov 11 16:37 
 Combi boilers and radiator bleeding. - MrTee43
How many radiators have you got on the system ?
Reply to this message | Report message
       
 Tue 8 Nov 11 12:10 
 Combi boilers and radiator bleeding. - Snakey
I've got 10 radiators in total on my system(3 bed detached) of which 2 are small and 2 are the towel heater types in bathrooms.

It doesn't seem to lose a lot, but it does need a top up every so often and I've never find any leaks!
Reply to this message | Report message
       
 Tue 8 Nov 11 12:37 
 Combi boilers and radiator bleeding. - Roger.
How does one add water to a combi boiler?
As there is no water tank in our house, it is surely fed directly from the mains?
Reply to this message | Report message
       
 Tue 8 Nov 11 12:41 
 Combi boilers and radiator bleeding. - Zero
>> How does one add water to a combi boiler?
>> As there is no water tank in our house, it is surely fed directly from
>> the mains?

Yes, and mains water fed in through the filling loop provides the pressure. (well it doesent keep it pressurised, the pressure vessel does that)
Last edited by: Zero on Tue 8 Nov 11 at 12:41
Reply to this message | Report message
       
 Tue 8 Nov 11 12:55 
 Combi boilers and radiator bleeding. - FocalPoint
I don't have a combi, but my system is the directly pressurised type, i.e. it has no header tank and no cold water storage tank. I believe it is referred to as a "vented mains pressure system".

I have to turn a tap every so often - maybe every three or four months - to bring the pressure up to the required level, which is around 1.25 bar. I've never found any leaks.
Reply to this message | Report message
       
 Tue 8 Nov 11 13:09 
 Combi boilers and radiator bleeding. - Mapmaker
Radiators should never be bled by tenants.

If they require frequent bleeding then there is insufficient inhibitor in the system (or a leak) and a fitter should be called.
Reply to this message | Report message
       
Latest Forum Posts