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Derek M
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Derek M
@derek-m
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Illustrious Member
Joined: Mar 4, 2021
Last seen: Sep 19, 2024
Profile Activity
Topics: 7 / Replies: 4403
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RE: Looking for reference sites and installer recommendations

@iancalderbank One thing that I would definitely recommend, whether you eventually go for a heat pump or not, is to try to improve the energy effici...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Solar and battery getting installed

One can carry out calculations until one is blue in the face, but if the system design, installation and commissioning is not done correctly, one coul...

3 years ago
Forum
Energy Storage
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RE: Solar and battery getting installed

Have you been provided with any heat loss calculations? The size of heat pump required would normally need to be 1.25 to 1.5 times the calculated heat...

3 years ago
Forum
Energy Storage
Reply
RE: Mitsubishi Ecodan & Raspberry Pi automations

The functionality of the Ecodan controller appears to be somewhat similar to that of a PID Controller (Proportional Action, Integral Action, Derivativ...

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

This is one of the reasons why weather compensation cannot provide perfectly accurate control of the indoor temperature, but because the change in out...

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

I think that you will find that the above technique would work fine if the only influence was the outside air temperature, but takes no account of oth...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: My ASHP is running out of hot water

Hi Katie, It may be possible that the water flowing to your upstairs hot water taps is via the 'green pump' pipework rather than the pipework from t...

3 years ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Ecodan. How to run this efficiently with zero understanding.

[/quote] Let me explain a little bit about heat loss and weather compensation (WC). If there is a difference in temperature between the inside of ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mitsubishi Ecodan & Raspberry Pi automations

Personally I would suggest increasing the time interval to 60 minutes, since this is probably the more stable starting point.

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

I usually suggest initial Weather Compensation (WC) settings of Leaving Water Temperature (LWT) of 50C at an outside air temperature of -5C, and LWT o...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: My ASHP is running out of hot water

Hi Katie, That makes a little more sense. Each device is a flow regulator/indicator, which I do believe have an operating range of 0 to 6 litres per...

3 years ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: My ASHP is running out of hot water

Please explain what you mean by 'valve pressures'?

3 years ago
Forum
Domestic Hot Water & Cylinders
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