Ask the Question

iansas · Joined: 27 Dec 2003 Posts: 40 Location: brook surrey uk

thanks again john.
the heating is the bottom outlet from 3 port valve water top and flow in from side.
i haven't tried with the towel rail off but will give it a go.
i get really frustraited as it has worked for atleast 4 years now with out any problems.
still of to the pub now so it will have to wait Laughing

thescruff · Moderator Joined: 03 May 2003 Posts: 4631 Location: Bath

I meant port A or B.

If it worked for 4 years what alteration have been made to unbalance the system.

scruff

thescruff · Moderator Joined: 03 May 2003 Posts: 4631 Location: Bath

copy when in debug mode.

scruff

iansas · Joined: 27 Dec 2003 Posts: 40 Location: brook surrey uk

sorry about valve exits(i'm not a plumber)
I didn't make any changes. it just started banging and thats when i tried this site. the only changes i made where to the vent which you suggested and i believe it does vent it better.
perhaps i just didn't fill or balance the system correctly. perhaps you could advise me on that, then i promise to leave this subject alone Laughing

thescruff · Moderator Joined: 03 May 2003 Posts: 4631 Location: Bath

iansas · Joined: 27 Dec 2003 Posts: 40 Location: brook surrey uk

A is heating and B is hot water. i have put the pump to no 3. over to you.

thescruff · Moderator Joined: 03 May 2003 Posts: 4631 Location: Bath

At least thats the right way round so give it a try on the faster pump while I think some more.

Have you had the burner checked and serviced.

scruff

iansas · Joined: 27 Dec 2003 Posts: 40 Location: brook surrey uk

no i haven't had it proffesionally serviced, since i've been here 4 years. although i have decoked and cleaned it. ah we love to save money DIY Exclamation

i did have a have a strange moment this morning, well not actually me Exclamation

but i thought the down stairs rads had reversed their flow and return as i was just trying to balance the system. i think that when both A and B circuits are flowing it does one thing and when i turn the B (water) off but keeping the A (heat) flowing, i thought it reversed the down stairs as said. now i'm actually quite pleased Surprised

cause i think this could be the whole problem(i'm sure your proffessional opinion wil agree) BUT i can't get it to happen again. i'm just waiting for it all to cool down again and i will give it a little fumble Laughing

i'm assuming that there is obviously a little reverse circuit around the down stairs and that must really reduce the flow to the boiler

BUT i thought the 2 heating circuits joined together before they joined the common return as i looked under the floor boards,i could be wrong(and usually are, according to my "beloved princess" Laughing

)
so to the question. How can i know for sure whether the two heating returns join together before they join the common return , without having to rip up a load more floor boards as they are in a different room Confused

thanks again and sory to totally take over the site Very Happy

AlanE · Posted: Tue Feb 10, 2004 9:37 am Post subject:

Ian have you tried putting a dose of sentinal x200 scale remover into system?

Boiler is a Camray presumably fitted with a Riello burner. When was this last checked and serviced? Could be that pump pressure has risen and now there is too much heat input - rather than water system not getting rid of original level of input.

Does the top outlet pipe from boiler continually rise to form vent pipe?

Alan

iansas · Joined: 27 Dec 2003 Posts: 40 Location: brook surrey uk

hi alan
no i haven't put any sentinal x200 just some fernox flush.
no the boiler has not been prefessionally serviced for atleast 4 years Embarassed

i'm not sure about the flow continually rising maybe has some horizontal, don't know with out pulling up floor boards etc.
you can definately hear air bubbles going round at the boiler(in garage) which is why i think its vent trouble, would sludge cause air to build up and creat this problem.
but i think i need the boiler checked first to eliminate that. perhaps the engineer would give advise on the problems, i know it isn't always easy trying to sort out problems via post notes.
how do i guarantee that the engineer knows what he is doing, i don't need another cowboy (i've got enought horses and hats Laughing

)
do you live near guildford alan Question

AlanE · Posted: Tue Feb 10, 2004 8:28 pm Post subject:

Ian for oil boiler servicing go to http://www.oftec.org/ (they are the corgi equivelent for oil) and select find a technician near you.

At least if you find one this way you can complain to oftec if there is a problem with him.

You said "i know it isn't always easy trying to sort out problems via post notes. " that is true.

With some problems a site visit is necessary. There are often occasions where a heating engineer can recognise a problem - or possible problems - just by seeing the system in the flesh.

Whatever the solution turns out to be PLEASE post back here for all to learn. I would be the last to claim I know it all and all feedback helps the learning curve along.

Alan

iansas · Joined: 27 Dec 2003 Posts: 40 Location: brook surrey uk

thanks for address alan. i will get on to them staight away.
i hope you didn't think i was saying you all didn't know what you are doing infact quite the opposite. you have been very help full.
i will let you know the results.
Rolling Eyes

iansas · Joined: 27 Dec 2003 Posts: 40 Location: brook surrey uk

well had boiler tested and serviced and he said it was working very well.
here are the results of the test.
O2 % 20.9
CO ppm 0
CO2 % 0.0
prs. mbar 0.47
how does that look Question

it doesn't match the commissioning data in the book Exclamation

. what do you think Question

he did tell me that there is loads of air in system and advised me to put an auto air vent, in flow and return, at first bend above boiler, as there is a loop in the garage in both pipes. he said the noise at pump start (mentioned earlyer in posts) is the pressure on the air in the system.
does that make sense. and would he be correct Question

he noticed the air straight away and immediatly mentioned vent problems. i think both alan and john (scruff) were on the right track right from start, but my discription didn't tell all, as i couldn't get into loft space above garage.
so gents are the readings any good Question

is the whole problem the venting and will 2 auto vents solve problem or would removing the loops and re running the pipe be better Question

having been on call the last week i have just been advised i'm off to south africa tonight. so i will have the fattest "jo blake" and largest bottle of pinotage and think of all the air in my heating, NOT Laughing