I posted this in another thread but didn't receive a reply so please forgive the new post...
I replaced all but two (a decorative panel radiator in the dining room and a small radiator in the downstairs toilet) of my manual TRV's with HR92s and everything was fine. I then ordered another HR92 and fitted it to the panel radiator in the dining room (which previously had a manual Honeywell TRV) and the valve is whistling so much it's almost constantly turned off. The valve did not whistle with the manual TRV so there's something about the HR92 that's upsetting the system.
The only difference between this one TRV and the rest in the house is that this one appears to be a European model (i.e. the display is upside down) but apart from that I believe there is no physical difference (it responds to the controller absolutely fine).
The one remaining radiator with no TRV's at all is the closest one to the boiler (which is in the garage next to the downstairs toilet) and that is always left fully open as I was of the understanding one radiator should be used for the bypass and it seemed logical to use the one closest to the boiler (and the one frankly which is most appreciated when left on full )
Any idea's folks? I've tried balancing the rad by opening/closing the valve on the opposite side of the radiator but it made no difference. Would replacing the actual valve make any difference?
I replaced all but two (a decorative panel radiator in the dining room and a small radiator in the downstairs toilet) of my manual TRV's with HR92s and everything was fine. I then ordered another HR92 and fitted it to the panel radiator in the dining room (which previously had a manual Honeywell TRV) and the valve is whistling so much it's almost constantly turned off. The valve did not whistle with the manual TRV so there's something about the HR92 that's upsetting the system.
The only difference between this one TRV and the rest in the house is that this one appears to be a European model (i.e. the display is upside down) but apart from that I believe there is no physical difference (it responds to the controller absolutely fine).
The one remaining radiator with no TRV's at all is the closest one to the boiler (which is in the garage next to the downstairs toilet) and that is always left fully open as I was of the understanding one radiator should be used for the bypass and it seemed logical to use the one closest to the boiler (and the one frankly which is most appreciated when left on full )
Any idea's folks? I've tried balancing the rad by opening/closing the valve on the opposite side of the radiator but it made no difference. Would replacing the actual valve make any difference?
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