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Post by Deleted on Feb 3, 2019 20:02:21 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 Keep us updated mate.  |
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Post by crowsfoot on Feb 3, 2019 20:08:35 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 Agreed PB, Me too thinks it's looking like a balancing issue now. Wingnut, with all the other rad lockshields turned off and the cold radiator still piping hot gradually go round the lockshields one at a time opening the lockshield just 1\4 of a turn and wait to see what happens to the cold radiator after bringing each one on (one at a time) keeping the cold radiator hot all the way. May take a while to do this but if it works! I'm now thinking that those new radiators are robbing the others of heat (maybe they have a less resistance to flow). |
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Post by tomplum on Feb 3, 2019 20:10:55 GMT
if you have 8mm feeding those big rads, thats where the probem lays mate, upgrade those to 10mm at least, 8mm is also easy to get kinks in at the installation so there might be another reason,
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Post by wingnut on Feb 3, 2019 21:01:57 GMT
so as expected rads have cooled down to lukewarm
ill list rads
Bathroom (old school type) hot all over and feed and return pipes hot, pipes as hot as rad
Study (single) hot all over and feed and return pipes hot pipes as hot as rad
Bed 1 nearest bathroom (double) Hot all over but cooling towards the lock shield side, trv pipe hot, lock shield pipe cooler, rad hot as trv
Bed 2 in between study and bed 1 (double) lukewarm, trv pipe roasting, lock shield very cool
Downstairs hall (single) lock shield pipe hot, trv pipe cool, radiator cool
Livingroom (Double) TRV Hot, rad cool, lockshield cool
Dining Room (original Double) trv warm, radiator warm, lock shield hot
Kitchen (single) TRV warm, Rad warm, lock shield hot
its worth noting that dining and kitchen rads are back to back, living and hall back to back and bed 1 and bed 2 back to back
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Post by Deleted on Feb 3, 2019 22:05:16 GMT
It's sounds well out of balance ! The old school rad sounds like it is stealing loads of heat/flow. Flow is the problem, there is not enough. Just shut the school rad off and see what happens.
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Post by wingnut on Feb 3, 2019 22:57:52 GMT
It's sounds well out of balance ! The old school rad sounds like it is stealing loads of heat/flow. Flow is the problem, there is not enough. Just shut the school rad off and see what happens. I can hardly touch the school rad pipes they are scorching hot, I’ll knock that one off completely and let you know the outcome Just wanna day thanks to everyone who has replied its very much appreciated, virtual beers all round 🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺 |
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Post by Deleted on Feb 3, 2019 23:03:30 GMT
It's sounds well out of balance ! The old school rad sounds like it is stealing loads of heat/flow. Flow is the problem, there is not enough. Just shut the school rad off and see what happens. I can hardly touch the school rad pipes they are scorching hot, I’ll knock that one off completely and let you know the outcome Just wanna day thanks to everyone who has replied its very much appreciated, virtual beers all round 🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺 You are very welcome wingnut  |
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Post by tomplum on Feb 3, 2019 23:14:15 GMT
send another beer to me, I'll have plumberboys, he's a ribina man , and I'll also convey you are welcome to our advice and info, this is the brewcabin, a no bullshit site for plumbing and heating advice , |
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Post by Deleted on Feb 3, 2019 23:27:33 GMT
send another beer to me, I'll have plumberboys, he's a ribina man , and I'll also convey you are welcome to our advice and info, this is the brewcabin, a no bullshit site for plumbing and heating advice ,  beer drinker |
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Post by wingnut on Feb 4, 2019 7:47:46 GMT
Bathroom (school type) radiator shut this morning will let you know what the outcome is when I get home this aft
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Post by wingnut on Feb 4, 2019 16:51:04 GMT
Update for you all rads exactly the same with bath rad off
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Post by battle1066 on Feb 4, 2019 17:26:47 GMT
Have you taken any of the TRV heads off to see if the needle valve isn't seized on the part of the valve attached to the rad?
Post up a picture of your type of TRVs fitted.
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Post by wingnut on Feb 4, 2019 17:28:25 GMT
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Post by wingnut on Feb 4, 2019 17:31:30 GMT
There is a noticeable thump when I turn down the trv on the dining room radiator
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Post by battle1066 on Feb 4, 2019 17:39:14 GMT
With the head off how difficult is it to move the valve in the housing - note it should only move 5mm approx from fully open to fully closed. |
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