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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Aug 15, 2025
Profile Activity
Topics: 17 / Replies: 2075
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Reply
RE: Is My Midea Heat Pump Inherently Defective?

That's a reflection of the impenetrability of the Grundfos literature, It really is some of the worst technical literature I have ever seen! This i...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Totally bewildered with my ECO4 heat pump installation

They are not called tutorials, but you have received advice in this thread that comes to the same thing. You have to bite the bullet and start doing w...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

@bobtskutter - thanks as ever for your detailed replies. By the way, if you do want to use quotes from posts, just select the bit you want to quote an...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

I don't think that is the same pump. Grundfos operate one of the most impenetrable identification systems known to man for their pumps, and their manu...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

@bobtskutter - thanks will look at the spreadsheet tomorrow (supper calls!). Yes, that is what I was suggesting (an artefact). Indeed. Simpl...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

@bobtskutter - thanks for your reply. Some answers: It soon got corrected (I noticed it was the wrong way round, and mentioned it. It was fixed b...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Best temperature wave form for best economy and efficiency .

@ivanhoew - these charts are difficult to interpret because of inadequate labelling, and insufficient accounts of methodology. For example, in the fir...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

Some further info: I happened to notice a bit over an hour ago my heat pump was in steady state (no cycling), as it often is at OATs of ~4 degrees, ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

@bobtskutter - I think I get at least some of the theory but I am still not sure of the analysis:(1) the PHE data recording was very crude. I can't vo...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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