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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Jul 30, 2025
Profile Activity
Topics: 16 / Replies: 2648
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RE: Compute heat loss from energy used

Re the Ebac heat pumps The heading on the table is presumably meant to be kW not kWh! - the 9kW one will be cycling almost continuously with a min...

4 months ago
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Air Source Heat Pumps (ASHPs)
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RE: (How) does your heat pump control its water pump?

Thanks, thats helpful And painting the outside black... The UI for many makes has not, IMHO, been designed or developed with the user in mind. ...

4 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Compute heat loss from energy used

OK so assuming a base temperature of 15.5, -2 will be 17.5 degree days. So your heat loss at -2 is roughly 3.5*17.5/24=2.6kW which is consistent with...

4 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

OK, further to the above (which please do read as its about a different and possibly equally important topic) this plot is a bit of a goldmine! ...

4 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

Thats good data. I will compare heating COP (which doesnt seem too bad) with mine later today and make some observations, but I think its worth takin...

4 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Database of heat pump performance data?

is it possible that the testing regimes are different (eg a different seasonal OAT profile?)

4 months ago
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Air Source Heat Pumps (ASHPs)
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RE: (How) does your heat pump control its water pump?

Thanks that's helpful. So what do the smaller units do when the demand is <2.5 kW. If the compressor can and does go lower (which you impl...

4 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Help for newbie Samsung ASHP owner

I dont know as I dont have a Samsung. I looked quickly through the manual and its there, but TBH it didn't seem as straightforward as one might hop...

4 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Help for newbie Samsung ASHP owner

Installer should have done this really but who knows. Programming a dhw time schedule will be pretty straightforward, suggest 90 mins once or twice p...

4 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Help for newbie Samsung ASHP owner

The manual to look at is the controller manual not the manual for the Outdoor unit that you show in the photo. Thats also the place to look...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Help for newbie Samsung ASHP owner

Has she programmed a schedule for the hot water on the controller?

4 months ago
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Air Source Heat Pumps (ASHPs)
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RE: (How) does your heat pump control its water pump?

Thanks. To me it looks like pump speed follows compressor modulation (which makes some sense if it is trying to maintain roughly a fixed DT across em...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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