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JamesPa
JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 16, 2026
Topics: 27 / Replies: 5235
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RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

Aren't you potentially confusing two things here. OP could of course increase rad size/ volume and reduce ft but that won't change the minimum output...

1 year 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?

It can't once it has got to minimum frequency. If it isn't already at mine frequency then I agree. That would overheat the house. If house ...

1 year ago
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RE: Performance of Heat Pumps in Mild Weather

@heatgeek here is the Farnborough Daikin on 7th April. A steady 7+kW when heating hot water and then a steady 1.6kW when it returns to space heating....

1 year ago
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

Im really gutted for you, there are loads of Ecodan 11.2kW machines out there and its a very popular and well renowned make, so it should work well. ...

1 year ago
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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...

1 year 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...

1 year 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...

1 year 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...

1 year 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...

1 year 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...

1 year 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...

1 year 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...

1 year ago
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