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Post by wingnut on Feb 3, 2019 17:55:27 GMT
Have you turned other rads off & checked to see if they get hot all over? Sorry, I can’t be bothered to read through the whole thread again If I switch all but the cold one off it gets piping |
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Post by tomplum on Feb 3, 2019 18:08:36 GMT
then the piping is inadequate or there's a build up of gunge, doing a powerflush might help but no one will guarrantee it will, the best thing to do is try balancing
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Post by wingnut on Feb 3, 2019 18:12:54 GMT
then the piping is inadequate or there's a build up of gunge, doing a powerflush might help but no one will guarrantee it will, the best thing to do is try balancing I have tried balancing but it appears to get 20 degree differential all lockshield are either an 1/8 or 1/4 |
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Post by tomplum on Feb 3, 2019 18:38:47 GMT
So we are narrowing it down then,
We can assume the pipes off the boiler are 22mm, Do you know how far they go before splitting to 15mm ? It could be that they slit too early or there's lenghts of 10mm running too long a distsnce, 10mm is ok as long as its in short lenghts,
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Post by wingnut on Feb 3, 2019 18:55:33 GMT
Defo 22mm off the boiler, unsure where it splits down as it goes into a wall (boiler is in outhouse) 8mm tails on the rads , strangely when we first moved in with only one double (in the dining Room) all was rosy it’s only happened since the additional 3 doubles have been added, could it be the expansion vessel being too small?
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Post by Deleted on Feb 3, 2019 19:12:32 GMT
Under sized pipe work mate !
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Post by wingnut on Feb 3, 2019 19:12:59 GMT
Just checked my boiler is feeding at 60 and returning 30
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Post by wingnut on Feb 3, 2019 19:14:07 GMT
Under sized pipe work mate ! From the three extra doubles? |
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Post by Deleted on Feb 3, 2019 19:18:14 GMT
Crank all the upstairs lockshields down to 1/4 turn and down stairs working rads to 1/3 of a turn and report back mate.
What speed is the pump on ?
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Post by battle1066 on Feb 3, 2019 19:21:33 GMT
Rads still as they were hot at top cool at bottom I wonder if you set all the lock shields to a 1/4 turn open and all TRV to postion two and check each rad and note which heats up first and report back that finding. Next you can open the cold/slower rads lock shields further and see if your system allows sharing of the heat source in case the system just can't cope by possibly losing so much heat in losses from Un- insulated pipework out of view? |
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Post by wingnut on Feb 3, 2019 19:35:22 GMT
Crank all the upstairs lockshields down to 1/4 turn and down stairs working rads to 1/3 of a turn and report back mate. What speed is the pump on ? Pump on 3 mate as per installation manual At the mo I’ve only two rads open Bed 2 Living room |
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Post by Deleted on Feb 3, 2019 19:38:58 GMT
Flow is your problem, either undersized pipe work or restriction in pipe work
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Post by wingnut on Feb 3, 2019 19:43:38 GMT
Flow is your problem, either undersized pipe work or restriction in pipe work All upstairs open 1/4 lockshield and 5 on trv All downstairs open 1/3 lockshield and 5 on trv |
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Post by Deleted on Feb 3, 2019 19:48:11 GMT
If you turn all working rads off and the problem ones get hot but goes cold when you have all working it's either balancing problem or restricted flow.
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Post by wingnut on Feb 3, 2019 20:00:05 GMT
If you turn all working rads off and the problem ones get hot but goes cold when you have all working it's either balancing problem or restricted flow. Hi mate Initially I’d turned all but two off Living room and bed 2 were the problem ones, when all others off they were piping hot. I’ve switched all to your recommendations 1/4 and 1/3 I’ll let you know the outcome |
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