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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 21, 2025
Profile Activity
Topics: 17 / Replies: 2698
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RE: Vaillant arotherm plus heat pump frost protection

Ok. How do you know frost protection is triggering (as opposed to just normal operation)? With the outdoor sensor indoors how can WC work. I'm a ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant arotherm plus heat pump frost protection

We might need to unpack this to work out whats happening. Here is an extract with the paper manual which came a couple of months ago with my unit (t...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant arotherm plus heat pump frost protection

Ok, just trying to clarify. So what you are experiencing if I understand you correctly is that when there is no call for heat and the outside temper...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant arotherm plus heat pump frost protection

What do you mean exactly by frost protection?

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Not a good January? My heat pump used 840 KWh of electricity

I use degreedays.net

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 4 port buffer tank connections

All fair enough. I dont think I can really add much more beyond what I've already said. if somehow you need to accommodate it switching itself on at...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan 6kW - is it "cycling", or normal operation?

All heat pumps cycle, in fact the 'non-cycling' temperature window is quite small even if the heat pump is perfectly matched to the house. Because th...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 4 port buffer tank connections

Well this is an interesting line of thought and I wonder where MCS would sit (on the fence? as far away as possible?) If manufacturer insists on a b...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 4 port buffer tank connections

OK thats definitely a different problem. The buffer will presumably cool down fairly quickly in relation to 12 hrs and at that point I imagine that ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan 6kW - is it "cycling", or normal operation?

The plot you posted was more like 80% duty cycle, unless you also increase flow temperature (compromising efficiency) then you cant, at the outdoor te...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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