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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: Mitsubishi Ecodan & MEL Cloud

@leftbacks Did you manage to resolve the problems with your system?

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan & MEL Cloud

@kev-m I think that you have been running your system in Auto Adaptation mode for some time now, so I would be interested in how it is performing. ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Real world connection to a heat pump over modbus

@cathoderay You may find the spreadsheet that I produce some time ago a useful tool to check theory against practice. You could try varying the valu...

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

You could try manually changing the speed on the water pump itself and see what effect that has. There are various water velocity calculators that c...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Heat pumps and on/off working - starting to quantify it

As James has correctly pointed out, the WC curve should be adjusted to try to keep the IAT reasonably constant at the desired temperature. In milder w...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Heat pumps and on/off working - starting to quantify it

Slow cycling at this time of year is not a bad thing, provided it keeps your home warm and does not use loads of energy. Short cycling (more than 6 ti...

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

I think that some time ago when Ecodan owners started using Auto Adapt, they found that when the heat pump was first started up after a shutdown, it r...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Heat pumps and on/off working - starting to quantify it

It is probably just a matter of gradually adjusting the WC curve until you get the correct values for your home.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Heat pumps and on/off working - starting to quantify it

As I explained previously, correctly adjusting the WC curve is a slow process that cannot be rushed. Gas boilers and oil boilers cycle, so why not h...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Real world connection to a heat pump over modbus

Gas boilers and oil boilers cycle, so why not heat pumps? Heat pump cycling is to be expected in the shoulder months, when the OAT can go from 5C to...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Areona 17kw questions/concerns

No problem. So the limiting factor as far as flow rate is concerned could be the valve or the 22mm pipe.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pumps and on/off working - starting to quantify it

Based upon the setting of your WC curve, the calculated flow temperature should be 29.6C.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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