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cathodeRay
cathodeRay
@cathoderay
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Illustrious Member
Joined: Feb 28, 2022
Last seen: Nov 10, 2025
Profile Activity
Topics: 17 / Replies: 2341
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RE: Testing new controls/monitoring for Midea Clone ASHP

@jamespa - I think the key thing is the current (as in the chart above) Midea data is the average over the previous hour, and so we lose sight of the ...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Midea ASHP – how to set weather compensation

I noticed that too and thought the same thing, but then thought the DHW is only a small part of the overall energy use. The note alongside it suggests...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Midea ASHP – how to set weather compensation

@pash44pump - I think the COP of 4.01 comes from the 'scope' document, and if so it is a SCOP:     which they say comes from the 'MC...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Testing new controls/monitoring for Midea Clone ASHP

The weather being what it is, gales then showers round here, I have used the time to plot the Midea OAT against the standalone RC-4 data logger OAT. T...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Testing new controls/monitoring for Midea Clone ASHP

I doubt it, many 'improvements' are quite the opposite. The problem with using this sensor at detailed enough resolution to see the spikes is that ...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Testing new controls/monitoring for Midea Clone ASHP

@benson - looks like good work, and thanks for posting here in sufficient detail to allow others to get started along the same lines if they want to d...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Midea ASHP – how to set weather compensation

Mostly, I think, but with some caveats. I set the TIMER option (left most tab) on the Schedule Menu, not the WEEKLY SCHEDULE, just checking you hav...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Midea ASHP – how to set weather compensation

@jamespa is right, typically they are far from linear, with most of the change in flow rate happening near total closure. Do be careful not to over-cl...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Midea ASHP – how to set weather compensation

I think it is a bug in the code, it comes on even when there is no huge kettle immersion heater in the buffer. The Midea Msmarthome or whatever it is ...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Midea ASHP – how to set weather compensation

I managed to find a perfectly good new but 'last years model' standalone one for £227 on Amazon in April 2024, and am miffed to see it is now only £17...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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