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cathodeRay
cathodeRay
@cathoderay
Moderator
Famed Member
Joined: Feb 28, 2022
Last seen: Aug 31, 2026
Topics: 18 / Replies: 2975
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RE: Our Experience installing a heat pump into a Grade 2 Listed stone house

That is undeniably true and is something I meant to mention. But sometimes it can be good news, as it was for me. I thought I had 11kW trying to cover...

6 months ago
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RE: Testing new controls/monitoring for Midea Clone ASHP

I can't even find it in the manuals, apart from in the modbus table. I wonder, where did you find it, and that it should be 35°C, which seems rather h...

6 months ago
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RE: Our Experience installing a heat pump into a Grade 2 Listed stone house

I agree. It is very useful to have real data. It really is very easy if you have a monitored heat pump. Given a steady IAT, then your energy del...

6 months ago
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RE: Say hello and introduce yourself

You can send private messages via the Messages (envelope icon) button under My Dashboard top right of the page, but generally we like to keep discussi...

6 months ago
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RE: Our Experience installing a heat pump into a Grade 2 Listed stone house

Here is the SPAB (Society for the Protection of Ancient Buildings) research on measured in situ U-Values vs calculated (spreadsheet standard tables et...

6 months ago
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RE: Our Experience installing a heat pump into a Grade 2 Listed stone house

28kW - that is what spreadsheet based heat loss assessments do. I had similar but not quite as large variations in assessments. I expect I am telli...

6 months ago
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RE: Our Experience installing a heat pump into a Grade 2 Listed stone house

@travellingwave — Thanks for your very detailed account of what you have done. I have a very similar situation, 200-300 year old stone building, solid...

6 months ago
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RE: Testing new controls/monitoring for Midea Clone ASHP

You might be able to, have a look at address registers 201 to 208, in particular 204 (from the wired controller manual modbus table). Try reading it f...

6 months ago
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RE: Testing new controls/monitoring for Midea Clone ASHP

@tasos, please do try to concentrate. That is the opposite of what I said: "both [LWT and RWT] are still above the IAT so heat will still flow from th...

6 months ago
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RE: Testing new controls/monitoring for Midea Clone ASHP

The LWT does indeed become equal to the RWT towards the end of each cycle (taking a cycle as trough to trough) but it both are still above the IAT so ...

6 months ago
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RE: Testing new controls/monitoring for Midea Clone ASHP

We have pretty much established by direct observation that Midea R32 units (and perhaps R290 units, less data available) modulate at most OATs (anythi...

6 months ago
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