Hi,
I've got 10 new Honeywell Evohome HR92 TRV's fitted to my radiators. But I'm finding that even though the rooms are only between 15deg and 18deg with a set point of 20deg the radiators are not coming on even though the boiler is firing (it's only cycling on and off every 5 mins) and the downstairs radiator without a TRV (room stat) is hot. I've taken the heads off of some of the TRV's and although they are nearly fully open the TRV is still closed. There is only about a quarter turn left on each to fully open but when I open it fully the TRV opens and radiator heats up. If there is so much travel in the TRV pin why is it only taking such a small adjustment between fully open and fully closed? I do remember on the old TRV's that they basically had to be set to the highest setting to get anything out of the radiator. I've watched a youtube video (from the evohomeshop site where I bought it all) of installing the RA adpater to the TRV and all mines are installed the same.
I've got 10 new Honeywell Evohome HR92 TRV's fitted to my radiators. But I'm finding that even though the rooms are only between 15deg and 18deg with a set point of 20deg the radiators are not coming on even though the boiler is firing (it's only cycling on and off every 5 mins) and the downstairs radiator without a TRV (room stat) is hot. I've taken the heads off of some of the TRV's and although they are nearly fully open the TRV is still closed. There is only about a quarter turn left on each to fully open but when I open it fully the TRV opens and radiator heats up. If there is so much travel in the TRV pin why is it only taking such a small adjustment between fully open and fully closed? I do remember on the old TRV's that they basically had to be set to the highest setting to get anything out of the radiator. I've watched a youtube video (from the evohomeshop site where I bought it all) of installing the RA adpater to the TRV and all mines are installed the same.