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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Oct 20, 2026
Topics: 18 / Replies: 3075
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RE: Midea ASHP Install & Potential Changes

That sounds in the right range, for a very rough COP at that ambient, perhaps a bit high, see 1200 to 1500 in the second chart I posted above. When th...

3 years ago
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RE: Performance in the current cold snap…

Unfortunately, neither provides any way to control their speed externally, beyond the push button control on the secondary pump. The primary one has i...

3 years ago
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RE: Performance in the current cold snap…

@iancalderbank - an update on the PHE inlet and outlet temps after setting the secondary pump to CC3. Took ten readings from each pipe then averaged t...

3 years ago
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RE: Midea ASHP Install & Potential Changes

@dons - no, you are not going mad, it is just Midea playing language games! On the wired controller screen, you have POWER CONSUM, which is the total ...

3 years ago
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RE: Midea ASHP Install & Potential Changes

In an ideal world, it wouldn't switch itself off. It runs continuously, adjusting the LWT, based on the WCC, to deliver the right amount of heat to ke...

3 years ago
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RE: Midea ASHP Install & Potential Changes

Ideally, you want the room stat set high enough to ensure the heat pump is always on, and all the other emitter controls fully open, to ensure the sys...

3 years ago
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RE: Performance in the current cold snap…

Sorry, but I want to be clear about this in my own mind. I think it may be all about what happens during the defrost, and how you account for it (in a...

3 years ago
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RE: Performance in the current cold snap…

Yes, I am sure as can be. It is down to simple numbers. The calculated heat loss at -2 is 12.4 kW, a figure that I think is as good an estimate as can...

3 years ago
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RE: Performance in the current cold snap…

Sorry, forgot to include this bit. Yes, will try CC3. I'm also going to put the left had WCC baseline back up to 56, at least for the next 12 hours or...

3 years ago
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RE: Performance in the current cold snap…

Yes, that is the right document. I absolutely get this, but my hands are tied by the design constraints: small area for rads, fitted the largest we co...

3 years ago
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