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JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: Jul 9, 2025
Topics: 16 / Replies: 2611
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RE: Performance of Heat Pumps in Mild Weather

Further to the above I discovered a bit more/had an additional thought about Daikin compressors. Firstly Daikin do make their own compressors so its ...

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

I must say Im also coming to the conclusion that there is a problem of this nature. OP has optimised the initially high flow temperature and its now ...

3 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?

Very much agree. I think OP is over-concerned about this because, as you say, cycling is 'designed in'. Also very much agree We may be spli...

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

'and thus its capacity' assumes that output is a linear function of modulation frequency. But I dont think thats the key point so lets not argue over ...

3 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?

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...

3 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?

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 ...

3 months 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....

3 months 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. ...

3 months 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...

3 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...

3 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...

3 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...

3 months ago
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