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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: 8kW Daikin Altherma R32 LT split

Well, we had the low-less header and accompanying Grundfos pump removed a few weeks back. And the results... well, the system has stabilised somewhat...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Do I need a bigger volumizer: 8kW Daikin Altherma R32 LT split

I believe I can see all of those readings, yes. I've been using them to watch it establish and maintain the temperature differential, cycling up and d...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do I need a bigger volumizer?

A very fair point James! The trouble is that without taking up floorboards, I'm not able to see the exact pipework. Ian, the unit has the flow rate ...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do I need a bigger volumizer?

That's my suspicion too. We do have two towel rails that are permanently on and there's always the 18l volumiser! I've dropped Daikin a message as ...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do I need a bigger volumizer?

Thanks... I've wondered from day one why it's there.

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do I need a bigger volumizer?

When I set the operation mode to be based on Leaving Temperature (difference vs return temperature) then yes, the internal ASHP pump is on, while the ...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do I need a bigger volumizer?

Yes, I think that's causing the very short cycling when the heating pump is off. I think it's actually pushing the water around the heating system, th...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do I need a bigger volumizer?

@ianc Yes, that's correct, those are the three loops I have. The ASHP is targeting 35C leaving the output from the internal unit, 30C coming back into...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do I need a bigger volumizer?

Thanks everyone. Today I basically did what everyone's (correctly) proposing - I set all rooms to 25C on the TRVs, full valve opening on lock nuts a...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do I need a bigger volumizer?

Thanks all. I'm as surprised as you that cycling is having such a big effect, but at the moment this is where logic is pointing. Tomorrow I'll force t...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do I need a bigger volumizer?

It's tricky to tell when it's using the difference between out and return flow temperatures rather than the Honeywell thermostat. The Honeywell syste...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do I need a bigger volumizer?

Thanks James and Derek. The LLH is inside the house, in the downstairs bathroom with all of the other indoor parts. When you mention the poor COP, re...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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