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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
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Topics: 7 / Replies: 4405
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RE: Vaillant Aerotherm plus does not reduce flow rate despite low delta T

I assume that you have received no error messages indicating some sort of problem. I believe that PWM controlled water pumps revert to full speed if...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Energy transition: The dark side of the electric car battery cobalt rush

It is things like this which cause me to avoid buying Chinese manufactured equipment whenever possible.

1 year ago
Forum
Renewable-powered transport (EVs & e-bikes)
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RE: Ecodan DHW Settings missing

Look at section 4.3 Dip switch functions on page B-57 of the attached document.

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Problems with Daikin 18 kW High Temp ASHP

The WC settings need to be adjusted to match the heat loss of your home. Do you have a copy of the heat loss calculations?

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Problems with Daikin 18 kW High Temp ASHP

While you may need a LWT of 55C at Outside Air Temperatures (OAT) of zero and below, you should not require 55C when the OAT is 5C to 15C. The idea ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Problems with Daikin 18 kW High Temp ASHP

The fact that the heat pump can achieve high temperatures does not mean it has to be operated at high temperatures, which can reduce it efficiency qui...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant 13kW Aerona3 - issues getting zones to temp

@crimson I'm afraid that you are likely to be 'chasing your tail' if you have zone valves opening and closing under different conditions. When heati...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Problems with Daikin 18 kW High Temp ASHP

@haggistrap Are you operating your heat pump in Weather Compensation (WC) mode and if so what are the settings? Why are you operating your heat pu...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

I believe that the temperature readings indicate that your system is quite well balanced, in that the flowrate into the LLH is slightly greater than t...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan DHW Settings missing

@pingu807 I would suggest that you check the setting of DIP Switch SW1-3 which identifies the presence or absence of a DHW cylinder. If the setting ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant 13kW Aerona3 - issues getting zones to temp

The important factor is the temperature of the water entering the radiators, which I doubt was at 42C. The calculated heat loss for living room 2 is...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant 13kW Aerona3 - issues getting zones to temp

@crimson The quantity of thermal energy that can be emitted by a radiator is dependent upon its size (emitting area), the MWT and the IAT. As the IA...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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