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SUNandAIR
SUNandAIR
@sunandair
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Noble Member
Joined: Dec 30, 2022
Last seen: Jun 17, 2025
Profile Activity
Topics: 5 / Replies: 490
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RE: Auto adapt and the curve

I ought to make a correction - I said it shuts down when it passes the set temp. What I meant to say it modulates as it reaches the set temp. And as @...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Auto adapt and the curve

I think your current room temp chart confirms that you need to be much higher than 30c flow temp. It is reaching your target room temp. And as is ofte...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Auto adapt and the curve

@westkent it’s defrosting when the flow temp line (in blue) drops below the return temp line. (In black) The flow temp rapidly drops because the de...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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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...

4 months ago
Forum
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...

4 months 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...

4 months ago
Forum
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...

4 months ago
Forum
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...

4 months ago
Forum
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...

4 months ago
Forum
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....

4 months ago
Forum
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...

4 months ago
Forum
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.

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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