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- 19 Dec 2015
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Hi, I am having trouble with one particular radiator downstairs not getting as hot as the others, surprise surprise it's a new radiator in the new garage conversion (double panel radiator), I have checked the usual stuff and the trv is definitely not stuck and the locksheild is fully open, I have had several heating engineers round and they are all completely baffled as to why this new radiator is not heating up as quickly as the others.
My system now has 10 radiators 5 upstairs 5 downstairs no microbore just the main 22mm flow and return leaving the airing cupboard and each radiator teed off in 15mm, I have asked the engineers if this a balancing issue and if this kind of thing is pretty common and I got varying replies, one engineer said "on a system like yours you should be able to have all locksheilds wide open and no need to balance as the trvs control the flow to each radiator, he suggested just to turn the pump to max (3) its currently on mid (2).
The other engineer said almost the opposite he said you only want the locksheilds on each rad open about a 1/4 to 1/2 turn as most locksheilds become useless at restricting flow once you exceed half a turn, he also says if water flows through the radiators too fast they won't heat properly does this sound correct?
Final engineer said we just set them all half open "count the number of turns on the locksheilds and half it"
Who is correct here? I am about to have an experiment with the system and see what works but currently all the original radiators heat fine and it's only the new radiator that is struggling to heat fully but the flow pipe to it is red hot the same as the flow pipes to all the other rads.
Hope this makes sense any help advice would be appreciated
Thanks
My system now has 10 radiators 5 upstairs 5 downstairs no microbore just the main 22mm flow and return leaving the airing cupboard and each radiator teed off in 15mm, I have asked the engineers if this a balancing issue and if this kind of thing is pretty common and I got varying replies, one engineer said "on a system like yours you should be able to have all locksheilds wide open and no need to balance as the trvs control the flow to each radiator, he suggested just to turn the pump to max (3) its currently on mid (2).
The other engineer said almost the opposite he said you only want the locksheilds on each rad open about a 1/4 to 1/2 turn as most locksheilds become useless at restricting flow once you exceed half a turn, he also says if water flows through the radiators too fast they won't heat properly does this sound correct?
Final engineer said we just set them all half open "count the number of turns on the locksheilds and half it"
Who is correct here? I am about to have an experiment with the system and see what works but currently all the original radiators heat fine and it's only the new radiator that is struggling to heat fully but the flow pipe to it is red hot the same as the flow pipes to all the other rads.
Hope this makes sense any help advice would be appreciated
Thanks