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SUNandAIR
SUNandAIR
@sunandair
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Noble Member
Joined: Dec 30, 2022
Last seen: Jul 23, 2025
Profile Activity
Topics: 5 / Replies: 496
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RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

As @cathoderay says, there’s a lot of mixed feelings about the risks especially in an unvented system with high useage. It’s fascinating how how even ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

It looks like the Legionella routine is only calendar schedule driven with user selected options such as an adjustable 15 day cycle or less. Temperatu...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

Hi @derek-m - you mean I could have got a free handout 😱 🤣🤣. Yes I guess the rush for car charging and battery storage does make it more versatile... ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

Sounds like I will have to look into this. We have a Solar wet system plumbed into the second heat exchanger of our DHW tank (you may have seen the ri...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

You’re comments sound very defeated... Surely there has to be some usefulness out of all the information generated. When we first got data out of our ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

At one level it made sense to me that the lines should disappear since they are not just temperature readings.... they also represent a snapshot of en...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

gotaASHP our plumbing engineer was excellent his pipe work and layout was a work of art. But the electrical side of things was a different story. I gu...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

Isn’t it madness? I don’t recall “self commissioning” being written in to the contract when I bought this expensive piece of kit? Still, this group...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

“Operation settings” adjustments offer some hopeful results. I’ve been trying different settings and got our best COP results so far. Control inter...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump delta T too low - 2c

I don’t see it as the only way.... how about lowering the ambitious set flow temperature? So that it matches the radiant capabilities of an inefficien...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump delta T too low - 2c

@benseb I think I read some earlier posts of your installation. The biggest problem I recall was the long line of rads off a 15mm pipe you also have s...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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