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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Aug 15, 2025
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Topics: 17 / Replies: 2075
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Reply
RE: Rate the quality of your heat pump design and installation

@derek-m - if I read the table on that page correctly, the default setting for S2 positions 3 and 3 is 11 ie on/on which equals variable speed Wilo (p...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: A Beginner's Guide to ASHP Monitoring

@morgan - one reason I called this post 'A Beginner's Guide' is to remind me to keep it as accessible as possible. I'll try to put together a glossary...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Rate the quality of your heat pump design and installation

I get the impression this is what is supposed to happen, but looking at the Midea Operational Parameters, the flow rate seems to favour around 1.4 m^3...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Rate the quality of your heat pump design and installation

I think you did a remarkable job of condensing many years of experience into a single sentence, but at the same time, I am also aware that in an ideal...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: A Beginner's Guide to ASHP Monitoring

Indeed, see my comment elsewhere (<=link). I particularly like the 'modbus hat for a raspberry pi', it's absolutely brilliant. I will endeavour to ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Getting the best out of a heat pump - is Homely a possible answer?

I hadn't, but now I have! Interestingly, this is the tightest of all the scatter plots. If I do it as a linear plot, R2 = 0.9507. Need to bear in ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Getting the best out of a heat pump - is Homely a possible answer?

I have just done my weekly data update, a very tedious manual transfer of data from the Midea app into a spreadsheet, and the updated charts look like...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Rate the quality of your heat pump design and installation

Don't y'all just love the jargon! More seriously, this is one of the big hurdles newcomers need to get over if they are to make any progress in this a...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Getting the best out of a heat pump - is Homely a possible answer?

I suspect getting your head round this quote is crucial to this debate, though the intervals are probably better thought of as 2 hours of COP2 vs 8 ho...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: The Seven Deadly Sins of bad ASHP install

And are there any unseen leaks, if it is an old system, and used to be open system with a feed tank in the loft, ie a pressure test. I accidentally ha...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: A Beginner's Guide to ASHP Monitoring

@derek-m - you are on the right trail, it is COP I am after, but it also means I will get some other data I would like, because they are needed for CO...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: A Beginner's Guide to ASHP Monitoring

Even 'simple' things like this are far from simple in practice. Who knows where Midea put the LWT sensor, and how it is calibrated. What I can do is, ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Page 146 / 175
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