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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: Do setbacks save energy without compromising comfort?

Some manufacturers do publish operating data performed during standard test conditions. That is the source of data behind the Modeling Tools I have cr...

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

Don't worry, the neighbours will complain about the noise and then the heat pump will have to be moved or removed. But having been installed it will h...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan not reading the correct temperature

The temperature sensor will be inside the controller, unless you have installed a remote unit, so will be of no use for room temperature control. Yo...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan not reading the correct temperature

Where is the controller located?

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Flow temperature up and down like a yo-yo

It would appear that your heat pump is cycling. Is your heat set for a fixed Leaving Water Temperature (LWT), in Weather Compensation (WC) mode, or ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

@cathoderay Excellent data once more. The fact that the OAT reading appears to increase by approximately 5C during the setback period, would make ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

The reason that I mentioned the cycling was because of the fact that it makes doing an accurate comparison between theoretical and actual that more di...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Twin ASHP Operation - Question

Could you explain the reason for wanting the heat pumps to run in tandem? I would have thought that if the actual heating demand, is not greater than ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

@cathoderay The Modbus registers are two byte 16 bit long. When displayed in binary the left-hand end is normally denoted to be the Most Significant...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

@jamespa Sorry James, I forgot to fully answer your query. The WC Modeling Tool infers that Energy Supply will be a product of LWT and the capacit...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

@jamespa Yes, the raw data was kindly supplied by CathodeRay, the accuracy of which I am not questioning. My objective is to try to avoid the comp...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan Room Temperature Mode

AA mode is designed to keep the IAT constant, so to the controller even 1C setpoint change is a large deviation between desired and actual. This is th...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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