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rhh2348
@rhh2348
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Joined: Feb 2, 2024
Last seen: Sep 4, 2025
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Topics: 9 / Replies: 89
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RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

Yes, can do that, though I ran the heating again from cold-ish this morning and got a different set of behaviours so will analyse and put up relevant ...

6 months ago
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Air Source Heat Pumps (ASHPs)
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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 I assume started shortly after this post. I actually found that thread a couple of months ago but had yet to go back and digest fully. Doing...

6 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

Thanks again for a response, @jamespa - will come back to it in a bit but wanted to highlight something happening at present first. The house has ha...

6 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

The low flow temp has been arrived at by a combination of repeated balancing of the rads such that the one furthest away has sufficient minimum output...

6 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

Not so - I mention reduced efficiency in the OP. If I could reliably achieve runs > 45 mins at a time with no effect on CoP/efficiency, I probably...

6 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

As I stated in the OP, I want to understand (and try to rectify) the operating inconsistencies - short-cycling can occur throughout the night with a r...

6 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

I know why you say that but, having a quick look back over the past few weeks of data only, I can see cycles as little as eight minutes in length.Logi...

6 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

[quote][quote]It should, however I imagine it's actually just a too-aggressive algo; logic would say that the unit should stay at the maximum flow tem...

6 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

At the time of the example I gave, it seemed to be <= 3C, yes - however I think that Mitsubishi's algo varies this depending on other readings; flo...

6 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

Is that the basis for all cycling - for example, if dT between LWT and RWT is too high, it means the house can't/doesn't need to absorb more - or are ...

6 months ago
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Air Source Heat Pumps (ASHPs)
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Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?
6 months ago
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Air Source Heat Pumps (ASHPs)
Replies: 31
Views: 2323
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RE: Ecodan consuming 100kwh per day in new build!!!

Any updates, OP (@anca1808)?

6 months ago
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Air Source Heat Pumps (ASHPs)
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