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JamesPa
@jamespa
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Joined: Apr 3, 2023
Last seen: Sep 14, 2025
Profile Activity
Topics: 17 / Replies: 2843
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Reply
RE: Ecodan help - flow temperature spikes when operating in weather compensation mode

That's reassuring. Hopefully it would have returned to space heating if there demand was there.

10 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 agree with your conclusions and I agree with the above. If they try to argue its your system, you have a heat exchanger which they presumably insta...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan help - flow temperature spikes when operating in weather compensation mode

Presumably it stops heating when the DHW reaches temperature, so if it only needs 30 mins then it will only take 30mins and then return to space heati...

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

@cathoderay See also my edited previous post and in particular pump test mode. Good luck.

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

The water pump manual tells us there are 3 pins, control, feedback and voltage reference ( presumably the return is via the case, ie ground) or if th...

10 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 you are right about multi-core, I just saw it in the manual. One of the cables appears to be the pwm cable. Im thinking narrowboats, whic...

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

Two wires doesn't seem enough - this isn't a boat with return via the chassis (I presume) so I would have expected three! That said I thought that PW...

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

Its not pretty but its pretty clear, pump speed is constant. However the manual seems to say it isnt! Something odd!

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

If this is the case then its a bit weird its not enough particularly as you presumably have a primary that is pretty low resistance (or is it?). So t...

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

Im not an expert on pump curves (or indeed very much else) however there is a good guide to reading pump curves here/p> I think the way to look ...

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

They decide is by measuring the flow/return temperature. The control loop adjusts the output of the heat pump (within the limits it can achieve) to g...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: In the Bleak Midwinter...

Fascinating. Referring to your first post, is it a cycle or a defrost. It looks like the latter but maybe Im misreading. Can you confirm Understa...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Page 135 / 239
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