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SUNandAIR
SUNandAIR
@sunandair
Member
Noble Member
Joined: Dec 30, 2022
Last seen: Dec 19, 2025
Profile Activity
Topics: 5 / Replies: 503
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Reply
RE: Working with my Ecodan

@willen-john wow. That’s a big improvement. 👍🏻

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Sensors positioning for Ecodan 8.5kw ASHP with pre-plumbed cylinder and buffer

@tadpole hi. Thanks for the further information. I can see that the reservoir of hot water may have been proposed to feed the two underfloor heatin...

2 years ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Working with my Ecodan

Thats good to hear. One possibility removed. It sounds like the Secondary Return, re-circulation, as described above is a reasonable contender… your...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Working with my Ecodan

I think, someone in the past also had a 3 port valve stuck partially open which can mean that while the heating is on the circulating water, at a lowe...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Sensors positioning for Ecodan 8.5kw ASHP with pre-plumbed cylinder and buffer

Hi Tadpole I think you’re wise to let the installer and manufacturer fully install and commission before trying to fix anything. However, your 4 ...

2 years ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Low Loss Header is losing 1.5c from flow temperature

@jamespa perfect…. thanks James Added (We tried a number of secondary pump settings until we got the lowest change in DT but we couldn’t do much...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Low Loss Header is losing 1.5c from flow temperature

hi Ian, here is my sketch again what do you mean that the DT Is the same both sides? The sketch shows a 1degC drop in one direction and a 1degC rise...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Low Loss Header is losing 1.5c from flow temperature

@iancalderbank thanks Ian yes there is a drop in flow temp across the LLH but there is a more or less equal rise in return temp across the LLH. Thes...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Low Loss Header is losing 1.5c from flow temperature

Earlier post… from 4 months ago Can anyone help with some maths on estimating percentage of energy loss of DT….? After a summer break we are no...

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

Thanks For your help... There are a few characteristics which appear to differ from one HP make to another HP make. In this case the relevant charac...

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

Interesting.... we also have a Secondary pump. However both pumps are external and adjusted manually to reach the desired deltaT however this can vary...

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

That’s interesting so it sounds like it allows the HP to modulate to a lower output? It’s a little similar to the Mitsubishi Auto adaptive function.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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