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cathodeRay
cathodeRay
@cathoderay
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Illustrious Member
Joined: Feb 28, 2022
Last seen: Nov 21, 2025
Profile Activity
Topics: 17 / Replies: 2352
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Reply
RE: ASHP in Hampshire

@batalto - your progress reported here is also very interesting, especially removal of the LLH header and relying on only the pump in the Midea main u...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Observation about radiators and weather compensation

@batalto - ah, that makes sense, I'd forgotten you have a considerable solar input. Downloading the raw data from the app - do you know if that is pos...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Observation about radiators and weather compensation

@batalto - I think the problem may be the charting. The numbers for 2022-11-18 ie yesterday/Friday (those in second screen grab) don't appear too unre...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Observation about radiators and weather compensation

@batalto - it's probably just me, but I am not sure I can make any sense of that chart apart from one thing - like me, you have your DHW desired temp ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Observation about radiators and weather compensation

I suppose that is plausible but it seems on the low side. Assuming building heat loss vs temp is linear, 12.4kW @ -2 / 0kW @ 20 degrees ambient, then ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Observation about radiators and weather compensation

@derek-m - thanks for the figures. I knew the adjustment wasn't linear, useful to have a bit more precision. Given some of the lockshields only have m...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Observation about radiators and weather compensation

Interim update: the rads are approaching being balanced, its taking a while because it is so mild and the heat pump is not running for longish periods...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Observation about radiators and weather compensation

I think so, but can't be sure. They were buried in the floor a long time ago (mid 80s). The point where the pipe enters the concrete definitely has vi...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Observation about radiators and weather compensation

I wonder what 'these' are? If they are flow meters, they don't come cheap, and four could easily set you back a grand. Also, on a PHE, but perhaps not...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Observation about radiators and weather compensation

I thought as much, and the answer is simple, as you say, publish the graph for each pump. The manual is huge anyway, a few extra graphs won't make it ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Observation about radiators and weather compensation

@derek-m - thanks for the detailed explanation. I still think the plots are not ideal, in particular the lack of scales on the axes. We don't even kno...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Observation about radiators and weather compensation

It is on the return side, pushing water into the PHE, via the filter (black cylinder) you can see in the earlier photo. Will do the PHE measurement ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Page 185 / 198
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