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SUNandAIR
SUNandAIR
@sunandair
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Noble Member
Joined: Dec 30, 2022
Last seen: Apr 16, 2025
Profile Activity
Topics: 5 / Replies: 475
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RE: Auto adapt and the curve

@westkent hi i can see now that at zero OAT these charts are showing defrosting. There seems to be a consistent deltaT. Does you house get up to the...

1 month ago
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Air Source Heat Pumps (ASHPs)
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RE: Auto adapt and the curve

Was this chart taken when the house was cold? I think it would help others to interpret this if you can give OAT outside ambient temperature and insi...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Heat pump's integral circulator pump

From an experience point of view I have been watching our fixed flow rate Ecodan operate for a few years now and have seen how versatile its modulatio...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: buffer/volumizer cupboard space eater, do i need one?

Here might be a case in point James. Here are 2 hourly charts showing flow and return. These are supposed to be operating at fixed flow 34C and...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: buffer/volumizer cupboard space eater, do i need one?

@heacol I’ve also herd that a volumiser can help with short cycling. I wondered if short cycling would be reduced if it was caused by mild outdoor a...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: buffer/volumizer cupboard space eater, do i need one?

Just to confirm… our system does not have a volumiser, buffer tank or LLH. Here is a chart showing how our defrosts occur. There is a 2 or 3 minute...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: buffer/volumizer cupboard space eater, do i need one?

I didn’t see your earlier reply to @old_scientist which goes a lot further in detail. Which is pretty convincing. ive copied it here for a reminder....

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: buffer/volumizer cupboard space eater, do i need one?

There are some compelling arguments for putting the volume on the flow side and I’m almost persuaded. However the emphasis appears more weighted on de...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: buffer/volumizer cupboard space eater, do i need one?

@jamespa thanks for the thoughtful reply. Would be interesting how the replies pan out.

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: buffer/volumizer cupboard space eater, do i need one?

Great answers @old_scientist. One other query I have with position G is - the location is on the return side…. after the DHW cycle the system feeds 50...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: buffer/volumizer cupboard space eater, do i need one?

So... where would you install the volimiser? See choices in the attached sketch. I think this will help to resolve some nagging inconsistencies in pre...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Oversized Ecodan

If your UFH is a high mass construction you may be able to store quite a bit of heat so you can run the heating above the cycling temperature or to a ...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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