My Samsung Gen 6 (5kW) is driving me mad when the outside temp is <2°C. Am I alone in this ?
I use it for running underfloor heating at a temp of about 35°C. (I don’t use it for HW at all). Normally it’s fine, but when the outside temp gets to around 2°C the thing throws a wobbly and stops heating. The outlet flow temp of the unit just drops and drops. It’s not showing the normal defrost cycle on the Operation Status menu.
Basically it seems to be extracting all the heat possible from the buffer tank and the whole thermal mass of my house! Thermal image of the fan shows it happily pumping heat out into the garden. I’ve woken before to actually have a heavily CHILLED floor close to 5°C instead of the normal 30°C. It’s bonkers and doesn’t lead to a happy household!
I now have to hover over it when the temp dips below about 3°C and be on standby to switch the UFH off circulation pump to at least preserve some comfort. If I leave the HP running in “Heat” mode, this results in the buffer tank getting colder and colder (like to 0°C) - with condensation on the pipes everywhere.
When it goes like this, to recover any sense of heat, I power down the HP and run a 3kW immersion in the buffer tank to at least circulate some heat (v. expensive!). And then light a fire…
My question is am I alone in this ? If not, has anyone had any luck in dealing with the same challenges ? Above all, what can I do to keep the HP working when the temp <2°C.
Thanks in advance. Off to get some more logs… 