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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: 4405
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RE: Interesting development on defrosting

I think that it was over 1 year ago when I suggested a method, primarily to improve overall efficiency, but in the process it may help reduce defrost ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do I need a bigger volumizer?

Was your system actually cycling or defrosting?

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do I need a bigger volumizer?

@rgledhill What are the on - off periods when it is cycling?

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do I need a bigger volumizer?

@rgledhill Adding a larger volumiser is not the same as having all the radiator valves fully open, because once it is up to temperature the heat los...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Rule change re ASHP

I can only state what my friend told me. He is a trained Electrical Engineer who has been with NG HV transmission systems for many years and is now in...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
Is National Grid fit for purpose?

At a New Years Eve shindig, I was talking with my friend who actually works within National Grid (NG). He was telling me how NG's middle and higher ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP & Buffer Tanks

It merely means that the flowrates in the primary and secondary circuits can be different.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: ASHP & Buffer Tanks

@davidalgarve Happy New Year. One possible way to reduce the flow rate in the secondary circuit would be to throttle in one of the isolation valve...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP & Buffer Tanks

Converting your system by changing the function from a buffer tank to a volumiser is not such a major task, that any competent plumber should be able ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP & Buffer Tanks

@jamespa I would agree with your statement James. If the water from the heat pump is flowing into the buffer tank at a slightly higher flowrate th...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: FTC cables broken - Can I use heat pump without? Ecodan Heat pump

The cable should be connected to THW1 - Flow Water Temperature Thermistor and THW2 - Return Water Temperature Thermistor. To get your system operati...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP & Buffer Tanks

This is a good example of the 'buffer tank effect', in that your heat pump is warming the water to 35C, when without the buffer tank it would only nee...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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