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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Jul 8, 2025
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Topics: 17 / Replies: 2064
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Reply
RE: Midea ASHP – how to set weather compensation

I will. We tend to have robust discussions here, but they very rarely aggressive or hostile. Most of us are primarily interested in getting to the rig...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mitsubishi Advanced Auto Adaptation

I think you will find you were agreeing with me, it was I who said there was a case for occupiers rather than installers doing it! I'm interested to...

8 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: Midea ASHP – how to set weather compensation

@tasos - if you have a Midea heat pump, as I do, I think you will find it can only run in two ways, fixed flow temp (LWT, leaving water temp) with a r...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Massive Electricity Cost for Running My Air Source Heat Pump

I'm afraid it comes with the territory. If all installers were perfect, and always did a perfect handover, things would be different, but that is not ...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: In the Bleak Midwinter... Midea heat pump performance, poor COP and windchill in action

@jamespa - I've done some more research... (1) it looks like the pump test mode is very basic. It is accessed via the 'For Serviceman' menu. When ru...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: In the Bleak Midwinter... Midea heat pump performance, poor COP and windchill in action

@jamespa - thanks. I'll wait for better weather before opening the cabinet! It might be worth seeing if other Midea owners here on the forum have...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: In the Bleak Midwinter... Midea heat pump performance, poor COP and windchill in action

Sorry, I should have said non-metal (ie wood, GRP) seagoing boats! Even on non-metal boats, galvanic corrosion is a major problem, and stray currents ...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: In the Bleak Midwinter... Midea heat pump performance, poor COP and windchill in action

I'm pretty sure the two wires visible are multi-core. The secondary pump for example has only one wire (cable) going to it, but it must have more than...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: In the Bleak Midwinter... Midea heat pump performance, poor COP and windchill in action

@jamespa - some more info such as it is (photos taken a while back): (1) I appear to have a Grundfos primary pump (this is the inside of the outdoor...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: In the Bleak Midwinter... Midea heat pump performance, poor COP and windchill in action

@jamespa - here's a not very pretty plot of OAT and flow rate for the last 48 hours. The right hand end is not typical, as the OAT exceptionally high....

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: In the Bleak Midwinter... Midea heat pump performance, poor COP and windchill in action

I think this is very pertinent. I believe the Midea reported flow rate (of around 1.4cu m/h) is about right because there is an anlague flow meter in ...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: In the Bleak Midwinter... Midea heat pump performance, poor COP and windchill in action

Yes, I agree, and also agree that the the combination of low rad temps and warmer but not yet up to desired temp rooms reduces heat transfer. For exam...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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