The Efficient Home Forum

Hi,
I noticed that, on a particular room where there are 2 radiators with HR92, in one of them, when the temperature is set at 20º, and we light the fireplace, the radiator is still working even when it shows 21º of ambient temperature. I checked the valve opening and sometimes at 29% and sometimes 10%, but still open. As additional info, that particular one is right below a window. The other one, located at the other extreme of the room and receiving even less heat from the fireplace seems to close it completely sooner. Is this the way it should work or might it be defective? At what point the valve should be fully closed?
Many thanks,
David

I'm also experiencing some unexpected behavior, maybe similar.
In my case I've got a singe room zone with a number of HR92 and HR80 on a total of 7 radiators. I would expect for each controller to have the same percentage of valve position, but at least one of them acts differently and is e.g. 35% opened when other HR92 are > 70% opened. This causes that particular radiator to become cold at some point while others are still warm. I've done multiple reset to defaults, unbind, bind, but no change in behavior.

Did you calibrate the valve correctly initially?

This may help? - https://youtu.be/kEAD-IkXRrY

I did that multiple times. But why would 1 controller, for example, show on the LCD valve position 70 and the other 30? Single zone with multiple radiators, all valve controller settings are default.

Is the HR92 zone set on single room or multi room zone mode?

Single room. And the one that does not open as much is under a window.