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Kev M
@kev-m
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Famed Member
5606 kWhs
Joined: Mar 5, 2021
Last seen: Jan 8, 2025
Profile Activity
Topics: 10 / Replies: 1266
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RE: Retrofitting: moving to ASHP old oil boiler in large old property - experience/advice please on MSC calcs

I missed that about the new radiators. I had all new rads and pipework fitted (I had no central heating before) and it was about £4.5k extra for every...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Retrofitting: moving to ASHP old oil boiler in large old property - experience/advice please on MSC calcs

@Katcesca, Hello and welcome. I think you've summarised the issue very well. You're comparing heating some of the house some of the time with all ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan 8.5kw working as on-off machine

I'm not exactly sure what nominal is; I think it's the compressor speed its official ratings are done at. P55 of the data book gives some info. Min i...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan 8.5kw working as on-off machine

@bialk An 8.5kWEcodan will be able to modulate down to 3-4kW at your flow and ambients. Have a look at page A-57 here. If it takes yours less ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan. How to run this efficiently with zero understanding.

My 14kW Ecodan can modulate down to 30-35% of its nominal output. Mine will start to cycle at about 10 degrees ambient, sometimes a little more. As ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan Melcloud temperature control with compensation curve

Firstly, Melcloud isn't great at controlling the Ecodan. I don't know where the -39 comes from but you can set where the room temperature is monitore...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan 8.5kw working as on-off machine

Some more information required, as a start: Are you running in Weather Compensation mode? What is the outside temperature where you are? Have ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Some big changes are coming to heat pump installation training

If ASHPs are to be mass-market it has to be a version of B. but with some expectation management included. Hardly anyone tinkers with their car a...

2 years ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
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RE: Boxing in your cylinders.

@marvinator80 looks like you could squeeze in some 12mm ply?

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Low COP on Samsung 16kw Gen6

On one of the other heat pump forums, a chap has taken all the COP data from a 11.2kW Ecodan, and the degree days data from where he lives and modelle...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan - issues with flow/return difference and fluctuation

Hi Sali, good to hear you made some progress. I think once you have all the pumps and valves sorted out things should be better. I'm afraid I know...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mitsubishi Ecodan - issues with flow/return difference and fluctuation

Sali, this is mine; running steadily then doing a defrost. You can see the 4-5 degree gap and the delay in return following flow. BTW I'm doing s...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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