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Post by endfeed on Nov 24, 2016 17:55:21 GMT
Hi chaps,been asked about a rad problem on a open vented system he's had a new boiler fitted and 2 of the rads are cold in middle.he has fitted new rad and same problem as occured?is it possile for the flow to shoot around rad and miss the middle then back out the rad?balancing issue??not seen this prob,just been asked,bit confused😝
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Post by tomplum on Nov 24, 2016 19:02:48 GMT
could be a sludge problem, perhaps when the flushed it ( if they did) the sludge in the rad moved to the middle,  |
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Post by endfeed on Nov 24, 2016 19:16:44 GMT
Not been to look at it myself,i always find what people tell you isnt quite as it is😮i asked if it been flushed before new boiler went in and it had not.he said the first rad got taken out back and flushed and same problem occured so he bought new rad and still had prob..😦
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Post by tomplum on Nov 24, 2016 19:35:40 GMT
if its not sludge then its bad circlation, blocked pipes/pipes too small/pump/air in system/or balancing,
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Post by battle1066 on Nov 24, 2016 20:37:06 GMT
I've had hassle where the system never filled properly after the boiler exchange, caused by the F&E 15mm feed being partially blocked as it joined on to the 22mm at the de-aerator,even though the F&E tank was full and the radiators were rebleed. The sludge in the radiator choked the air vent and they think the rads full of water but there not.
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Post by tomplum on Nov 24, 2016 20:41:33 GMT
this happens a lot battle, what i do is fit a 'combi style' filling loop where its convenient so you can blast the water in, It works fine,  |
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Post by rocketmanbkk on Nov 25, 2016 14:34:38 GMT
Can you not isolate rads other than these 2 & turn heat on. It might be ok
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Post by Deleted on Nov 27, 2016 21:41:59 GMT
Isolate other rads endfeed and if the problem ones heat up OK then you either have a poor laid out system or under sized pipework or a balancing issue, I find with balancing you can over come all these problems but it can take time and patience mate. |
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Post by endfeed on Nov 27, 2016 22:12:35 GMT
Cheers pb.
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Post by Deleted on Nov 27, 2016 22:25:02 GMT
Cheers pb. You're welcome mate. |
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Post by tomplum on Nov 27, 2016 22:31:05 GMT
if you've not seen this before endfeed it might help...
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Post by endfeed on Nov 27, 2016 22:32:36 GMT
Niceone tom
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Post by Deleted on Dec 10, 2016 16:55:13 GMT
My job today was some downstairs rads not heating up and when I saw the layout I could see why.  oil boiler in an out building and 22mm flow and return come into the house then go all the way to the other end then upstairs into the cylinder cupboard, not to bad so far but 28mm would of been better. smiley-confused002asak2 then it goes to shit 22mm from the 3 port down into the floor and 15mm everywhere from then on upstairs and down. there is a cellar and went down there and managed to crawl around, it was horrendous, I spent a while just clipping the pipes up it was a mess and was only repiped about 7 yrs ago. So I spent a good while balancing the system and even though under sized pipework I managed to get them all heating up. Attachment DeletedAttachment DeletedAttachment Deleted |
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Post by battle1066 on Dec 10, 2016 17:32:15 GMT
My job today was some downstairs rads not heating up and when I saw the layout I could see why. oil boiler in an out building and 22mm flow and return come into the house then go all the way to the other end then upstairs into the cylinder cupboard, not to bad so far but 28mm would of been better. smiley-confused002asak2 then it goes to shit 22mm from the 3 port down into the floor and 15mm everywhere from then on upstairs and down. there is a cellar and went down there and managed to crawl around, it was horrendous, I spent a while just clipping the pipes up it was a mess and was only repiped about 7 yrs ago. So I spent a good while balancing the system and even though under sized pipework I managed to get them all heating up. I assume most of the pipework was plastic PB so why don't they do it like you say above,its not much difference in the install costs as far as I can see? |
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Post by Deleted on Dec 10, 2016 17:37:28 GMT
That's the plan battle in the new year, I'll put 22mm in like it should be. but for now they are getting some heat everywhere from the balancing which is a bonus. |
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oil boiler in an out building and 22mm flow and return come into the house then go all the way to the other end then upstairs into the cylinder cupboard, not to bad so far but 28mm would of been better. smiley-confused002asak2 then it goes to shit 22mm from the 3 port down into the floor and 15mm everywhere from then on upstairs and down.