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Last seen: Sep 6, 2026
@burtis - we can see the flow rate stays much the same throughout, and the LWT/RWT rise (from 39/32 to 59/52, about what I would expect for a DHW rehe...
No you're not confused! There are actually two problems visible here: (1) heat pump can't quite cope during periods of low OATs (IAT falls and stays...
Yes, though it is very tedious and boring doing it. I have a python script that does it manually over modbus (by manually, I mean I have to set the ne...
Another chart showing the Midea heat pump can't quite cope in cold weather. Blue upper chart is outside air temp (OAT), lower green chart is indoor ai...
Yes that can be done, but why do it? If you want a pint jug of water at 40 degrees C, there's no need to boil a kettle, and then dilute the 100 degree...
Welcome to the forum! This is getting too hot - you might end up cooking one of the nippers (if they are nippers). The showers might be OK - unti...
@transparent - here's the page with more details and images on what my heat pump has.
@transparent - I summarised the results here. What we actually found were wiring diagrams showing the PWM control cable (in addition to the power cabl...
@burtis - what seems to be happening in both our heat pumps is the flow rate is somehow capped at the lower end of their respective ranges, with the r...
If you know when it will go into DHW heating mode (because it is on a timer?) then it won't take much to get useful readings, say flow rate, LWT/RWT (...
There is also enough info there to calculate calculate power output, which is LWT/RWT delta t x flow rate/3.6 x circulating fluid specific heat (the d...
If you get this in time, can you do some more screen grabs as the water continues to heat. It would be particularly useful to see what the heat pump c...
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Degrees of Separation
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