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SUNandAIR
SUNandAIR
@sunandair
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Joined: Dec 30, 2022
Last seen: Jul 9, 2025
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Topics: 5 / Replies: 495
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RE: Analysing MELcloud heat pump graphs

@boycey hi. thats a better picture.... in case you didn’t know , your first picture is showing a defrost.... where the blue flow temp line drops bel...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan set back

@morgan hi, We have been using setbacks while using weather compensation. You just set a schedule a little higher than your chosen room temperature....

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Analysing MELcloud heat pump graphs

@boycey I’ve posted the graph before the one you’re discussing with @gary the graph shows the apparent stopping of the HP which looks like it...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Analysing MELcloud heat pump graphs

Hi @boycey I don’t think the graphs you posted where they are straight and parallel are actually showing the HP in operation. If you look at them clos...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Analysing MELcloud heat pump graphs

@boycey in terms of understanding MELCloud here are a few graphs from our radiator system we are reheating on a low and slow WCcurve after a 12 c se...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Analysing MELcloud heat pump graphs

@boycey hi, So if your schedule was set back then it would appear the thermostat dropped below the setback temp at 4.40am and started heating but th...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Analysing MELcloud heat pump graphs

hi Boycey There needs to be a few bits of other information to be 100% sure. Most importantly is the heat pump operating… 4am looks like hp is off...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Running ASHP efficiently, general thought process. (Low and slow)

hi @boycey I don’t have underfloor heating so can’t comment on what adjustment to the existing setup you might make. hopefully there may be others in ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Running ASHP efficiently, general thought process. (Low and slow)

That’s great @boycey it might help to know how warm the room was at 14:00 and what was the outdoor ambient at the same time. It looks like the cyc...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Running ASHP efficiently, general thought process. (Low and slow)

Hi @boycey Optimum flow rate is 9 LPM for the PUZ WM50. Max/Min is 6 to 14.

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Running ASHP efficiently, general thought process. (Low and slow)

principles are good. regarding DT3 this may or may not be issue. May be issue- if flow rate is high (I believe the 5kw model has a low flow rate, le...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: non-Mitsubishi owners - how much control do you have over your ASHP "freeze stat" function?

@ecodan-efficiency Hi and thanks for your reply. just to clarify, over the past 2 years there have been several discussion threads on the Ecodan ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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