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JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 21, 2025
Profile Activity
Topics: 17 / Replies: 2698
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Reply
RE: Career change – entering the world of heating and heat pumps

Most people here (including me) aren't in the industry, so this may not be the place to ask for practical advice. However you aren't alone in wanting...

4 months ago
Forum
Introductions, Forum Rules & Updates
Reply
RE: Efficiency Concerns on newly installed Mitsubishi Ecodan 8.5kW

@CBrenewable @ashp-bobba seems to be on the case so I will step out for now to avoid possible confusion, name check me if you want me to step back i...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

yes thanks! Im not sure I can really comment further as your key concern (unless I misunderstand you) seems to be the thermal offs which appear to b...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Efficiency Concerns on newly installed Mitsubishi Ecodan 8.5kW

I cant immediately see anything wrong but I also cant follow the pipework. As you say this is a poor time to test/set things up, but I would still ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Efficiency Concerns on newly installed Mitsubishi Ecodan 8.5kW

Great. If you could post a picture of the area around the cylinder it would confirm that there is nothing untoward here.

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

Can you explain what you mean by 'off' please? If they are off how is that affecting the heat pump/circuits. If you are getting a SCOP of 3.5 what ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Efficiency Concerns on newly installed Mitsubishi Ecodan 8.5kW

@cbrenewable Hopefully the diagram shows one of the valves in the wrong place, otherwise there is a valve in the wrong place. Any idea why two pumps...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

@trebor12345 Hi. What is it you are still trying to solve/understand. I will see if I can help. Definitely that is a 4 port buffer.

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Efficiency Concerns on newly installed Mitsubishi Ecodan 8.5kW

@CBrenewable A COP of 2.4 is definitely low and you are right to be concerned. You should be seeing 4 or better at present. Can you tell us s...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: help sizing rads based on room by room heat loss

4 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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