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Crimson
@crimson
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Joined: Jan 16, 2024
Last seen: Jan 28, 2026
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Topics: 4 / Replies: 300
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Thanks @JamesPa, I think the external volumiser suggestion - supposed to be insulated - was on assumption no space inside but yesterday’s visit it was...

12 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

I’ll check which version the Grant is, suspect like you thats what the specialist is seeing - that there’s no requirement. Antifreeze valves the ins...

12 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

  @jamespa - the Grant ASHP isn’t being replaced, the 13Kw will remain, apologies if I wasn’t clear. The heat specialist was experimenting with...

12 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Thanks both. I’d forgot to detail that pump speeds either side of the LLH (Grant one and one in pump room). A lot of experimenting with different sp...

12 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Thanks @jamespa, I think over the almost 3 years we’ve attempted running all zones (Ive spent many hours with settings, balancing rads, closing off ...

12 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

It’s been a while since last gave an update…   After a couple visits from a heat specialist, and revisits to the calcs. It’s been concluded t...

12 months ago
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Air Source Heat Pumps (ASHPs)
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RE: What is a considered a decent weather curve for running weather compensation?

So with a flow temp maxing at 42C, managed to get living rooms to almost 21C at points in the day. 44C started to overheat one of the rooms so some g...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: What is a considered a decent weather curve?

Thanks Gary, I'll do that with the Drayton balancing key. I know the plumbers turned down the actual lock shield a bit as well so combined should rea...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: What is a considered a decent weather curve?

Thanks Gary, I'll then look at killing off the setback to see if can run it lower (I say it switches off, I have the hallway panel it go down from 23C...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

I've created a separate thread to discuss WC settings as feel that's a more specific topic. Still waiting on installers to come and sort that airloc...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
What is considered a decent weather curve for running weather compensation?
2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 5
Views: 1626
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Yeah, I’m just concerned that the design of the system is 40C at -3C ambient, if I keep pushing up percentage wise I’m getting quite above that and wo...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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