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rgledhill
@rgledhill
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Joined: Dec 27, 2022
Last seen: Mar 13, 2024
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Topics: 2 / Replies: 29
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RE: Do I need a bigger volumizer?

@jamespa External box in brown is the LLH (heat exchanger is inside the main Altherma internal unit above, the upper brown box); cycles on/off time - ...

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

Thanks James. I'd come to the same conclusion about the effective system volume as the radiators are likely to be largely closed when the house is sit...

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

I think the estimated energy usage is way off. The calculations show 19,000kWh/yr but even with two EVs doing nearly 20,000 miles between them, we onl...

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

Thanks James, TLAs are the way of the world these days! It's cycling a lot at outside air temperatures of between 8 and 15C, less so at 7C or less. Do...

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

@jamespa Thanks. Apologies, I've no idea what "oat" is. Assuming it's something to do with temperature, I have it set to target 38C, and it's aiming f...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Do I need a bigger volumizer: 8kW Daikin Altherma R32 LT split
1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 43
Views: 5095
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RE: Daikin Altherma LT R32 - poor SCOP and breaking heat exchangers!

Ok, finally the problem has been solved!! It seems the original problem was a faulty pressure sensor or pressure control board, causing the system t...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Daikin Altherma LT R32 - poor SCOP and breaking heat exchangers!

Thanks Alastair! It's looking hopeful now. It's basically been about 30-50% below COP since day 1, yet we're still seeing about COP=3 at the moment,...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Daikin Altherma LT R32 - poor SCOP and breaking heat exchangers!

Daikin have been out today and have diagnosed either a faulty pressure sensor or a constriction on the pipe, since the pressure reading that gives the...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Daikin Altherma LT R32 - poor SCOP and breaking heat exchangers!

And overnight the unit failed with an overtemperature on the sensor on the outlet from the compressor... looks like a misbehaving valve which isn't th...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Daikin Altherma LT R32 - poor SCOP and breaking heat exchangers!

Had the engineer visit today and he can't find a cause for the problem. No loss of refrigerant, and he's confirmed the hissing sound isn't normal. Al...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Daikin Altherma LT R32 - poor SCOP and breaking heat exchangers!

Thanks Bob. I'm just using figures from the front panel screen, nothing special. It doesn't say anywhere about the energy out details, but I'm pretty...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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