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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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Reply
RE: Ecodan cycling

The values you calculated are the quantity of thermal energy that the heat emitters can supply to the rooms. To keep the IAT reasonably constant, it i...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Say hello and introduce yourself

Hi Chillybot, welcome to the forum. Don't despair, there are quite a number of very helpful people on the forum, who will hopefully guide you throug...

2 years ago
Forum
Introductions, Forum Rules & Updates
Reply
RE: Ecodan cycling

I have attached a radiator output calculator in a spreadsheet. The yellow highlighted cells are the ones that can be varied. If you know the flow an...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Samsung 12kw cycling?

Sorry I should have made it clear. Most forum members now use the abbreviation IAT to denote Indoor Air Temperature. Bet you can't guess what OAT mean...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Samsung 12kw cycling?

Yes, many of us prefer the IAT slightly warmer. One of the pleasures of growing older. 🙄 Of course increasing the IAT, increases the heat loss, whi...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Samsung 12kw cycling?

What happened to the IAT when you raised the WC curve?

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New Build - Grant Aerona3 10kW - Questions and observations

It is possibly electrical interference on the cable rather than affecting the thermistor. The controller will be measuring the OAT by passing an elect...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan cycling

@walkers-heatpump I can't remember how many industrial control systems I have fine tuned over my 50+ years career, but when possible the first thing...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan cycling

One thing that I would suggest is that you switch off AA mode for a while and optimise the WC curve, since my understanding is that in AA mode the con...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan Minimum Run Time, Flow & COP

@fazel Thanks fazel, much appreciated. I suspect that the training manual is for industrial type units, since the smallest compressor of a twin co...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New Build - Grant Aerona3 10kW - Questions and observations

@ggw In addition to the suggestions by AllyFish, another reason could be electrical pickup from a nearby power cable, that is only live when the hea...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan Minimum Run Time, Flow & COP

Welcome to the forum and thank you for the detailed report. I must admit that I was not aware of the Compressor On Guard Strategy, which I don't belie...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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