phoenix70
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| posted on 25/1/10 at 06:39 PM |
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OT - Any Heating Engineers in the house
Hi Guys,
Way off topic this one so please forgive me.
I had my storage tank replace recently and after the new one was fitted we had a problem with a banging noise coming from the TRV's, so called
the fitters back out to it, but while waiting I did some investigation myself and decided that the central heating pump was in the wrong pipe, when
the guys arrived back they said, its not in the wrong pipe ,its just the wrong way round. The pump is mounted in the return pipe from the Raidators
which I still feel is wrong. Also something else that convinced me I am right, is if I leave the TRV's on my upstairs raidiators open, they
heat whether or not the central heating pump is on or not.
Any opinions?
Cheers
Scott
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bob tatt
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| posted on 25/1/10 at 07:05 PM |
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need some more info really what system have you got now is it still stoared hot water i would assume so as all combis have the pump internal so
impossible to get wrong. is it open vent or sealed system. bit more info and ill try and help.
rob
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tegwin
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| posted on 25/1/10 at 07:13 PM |
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Its not the end of the world if the pump is before or after the heater... but it does need to be pumping the right way around the system!!
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Peteff
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| posted on 25/1/10 at 07:34 PM |
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The pump should pump the cooler return from the radiators through the boiler, they are right there. If it's after the boiler the newly heated
water will not do it any good. The hot water will rise to the highest point in the system upstairs whether pumped or not, it's what hot water
does  The TRVs are just thermostats so if the water is not up to their operating temperature they will stay open and warm the radiators.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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skinned knuckles
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| posted on 25/1/10 at 08:41 PM |
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agreed with peteff, pump should be on the return, sucking the water through the system, passing it on to the boiler.
The pumps on heating systems dont stop the flow of water when turned off, but they may impede it slightly. never the less, water will convect round
the central heating system to some extent when the hot water is on.
are the TVR's still noisy or has the switching round of pump flow eradicated this?
A man isn't complete until he's married, then he's finished
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ginger ninja
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| posted on 25/1/10 at 08:44 PM |
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there is a bit of confusion here, and as already mentioned it is difficult to offer an opinion without seeing things first hand. Water is like air, a
good conductor of noise, which can sometimes be misleading. However, your comments about water flow direction would make me question which pipe the
TRVs are installed in.
If the water is flowing the wrong way through the valve, as the valve disc approaches the valve seat, the water flowing over it instead of from
beneath can cause chattering.
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phoenix70
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| posted on 25/1/10 at 11:27 PM |
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its an open vented system, it's not a combi system, has a seperate boiler and a hot water store.
Turning the pump around has solved the noise from the TRV's.
I never noticed the raidiators staying hot with the old system but maybe I just did'nt notice it.
Looks like you guys have saved me making a fool of myself, so thank for the input.
Cheers
Scott
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