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JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 5, 2025
Topics: 17 / Replies: 2674
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RE: Help me keep the faith with my air source heat pump installation

@adamk Please feel free to post any proposals for comment. I'm sure you will get some useful feedback. If it helps, and I hope it does, my Vailla...

4 months ago
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RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

To the best of my knowledge demand < minimum output is the only reason for cycling other than defrost, unless of course there is something else (eg...

4 months ago
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RE: Help me keep the faith with my air source heat pump installation

which (a) is, I suspect, the outcome he wants (because he doesn't want to bother training up) and (b) may well be at least in part true because of...

4 months ago
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RE: Performance of Heat Pumps in Mild Weather

After I wrote my initial comment I guessed that might be the case! Turning down the flow might reduce the peak power output but I cant see how it...

4 months ago
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RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

... which presumably will reduce the cycling frequency but not materially change the on/off ratio (which is determined by the ratio of demand to minim...

4 months ago
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RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

Sorry I cant help further. Knowing when the various components (compressor, fan, EEV, water pump) change state might illuminate the matter, but other...

4 months ago
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RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

Cycling will occur if the heat demand (measured in kW) from the house is less than the minimum output of the heat pump (also measured in kW), which is...

4 months ago
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RE: Performance of Heat Pumps in Mild Weather

I cant immediately see you are misreading - although I cant be sure, I can only try to deduce, which lines correspond to which scales. Im presuming y...

4 months ago
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RE: Anyone able to provide some feedback before I make my finale decision? Samsung vs Baxi vs Vaillant

You are right to be cautious about the AI analysis, definitely contains some BS. Once you have a preliminary decision feel free to post it and the ra...

4 months ago
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RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

Weird. This implies that the switch from heating mode to cooling mode is after this 5 minute period, in which case whats the 3 minute previous previo...

4 months ago
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RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

Where does the heat during the 5 min period go, to the evaporator to de-ice or to the heating system (which makes no sense). Is the water pump runnin...

4 months ago
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