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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Sep 9, 2026
Profile Activity
Topics: 18 / Replies: 3023
AllTopicsReplies
Reply
RE: Massive Electricity Cost

@kev-m - I've extracted and tidied up the Midea 14 and 16kW data from the Engineering Data handbook.

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Massive Electricity Cost

I mentioned this very quote not so long ago. You can actually log onto the Headroom Heat Pumps dashboard but it shows no data, I guess because it has ...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Massive Electricity Cost

@kev-m - thanks. I would normally think it is a given that if you have two units (or in this case the same unit running at different outputs) running ...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Massive Electricity Cost

This definitely comes at the very extreme end of the scale for me, very disruptive eg fitted kitchen (I have sometimes also wondered whether fitted un...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Massive Electricity Cost

Thanks, in fact much of this is already done or in hand: 1. Loft insulation: already part done, rest ready to go in once I have removed old cold wat...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Massive Electricity Cost

I doubt it, the system was designed with a flow temp of 55 degrees. Lack of available wall space for rads was a major constraint, necessitating a high...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Massive Electricity Cost

@benseb - I don't know what the weather comp curve is supposed to do when it goes outside the set parameters. Does it keep the same gradient, or flat ...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Massive Electricity Cost

Summary from the Midea app for yesterday: 24 hour ambient -0.12 degrees (whatever that is), 93kWh used, or Ā£35.34 at today's cap price. That's Ā£247.38...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

@mjr - thanks, very useful, and I agree about the defrost cycles being short, and taking the heat mostly from the primary side, as I mentioned the rad...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

@batalto - we all but posted at the same moment. I have considered flipping the dips, but am holding back, because kWh usage is already unsustainably ...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

I have checked the Midea controller every 5 mins or so over the last hour having set the LWT to 55 degrees. What I observed was: ambient -2 most of th...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

There is certainly a lot of modbus stuff in some of the Midea manuals, but I have yet to do my homework on what modbus is, though I'm guessing it is s...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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