Last seen: Nov 21, 2025
I think that's what they do, so they are varying ft. It would be good to see some plots at various oat values
No cycling there except possibly at midnight on the first day. You would expect so but don't forget cop varies with oat also. Also depends on how l...
Possibly. I haven't yet worked out what Vaillant do with water pump speed as I can't monitor it and don't have a reason to care. Why is it a 'proble...
So is the flow temp changing as well or is that fixed?
Yes but (a) you are talking Facebook and (b) it was the coldest day of the year so far so hardly surprising (+ all the things you say above)
My strong suspicion is that if a heat pump would otherwise cycle, particularly if it would otherwise cycle with short on time, then setting it to idle...
Can you clarify why the heat pump seems to go off altogether for several hours each day. [/quote] That is because I run in expanded mode and durin...
Not great. Average run time < 1 hour. Suggests cycling on thermostat or due to oversize. However not that many hours either, when was it fitted? ...
I would leave for now, make only one change at a time! NR mode will likely improve efficiency but no idea if it's significantly. Of course it also c...
I'm guessing the sharp dips in FT are defrost cycles. Recovery is slow and I cant see the expected spike immediately after defrost. Have you got 'qu...
Save yourself some angst. Until the flow rate is fixed there is nothing worth speculating about. Once its fixed then measure the temp drop across ...
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