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Crimson
@crimson
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Joined: Jan 16, 2024
Last seen: Oct 23, 2025
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Topics: 4 / Replies: 229
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RE: Grant 13kW Aerona3 - issues getting zones to temp

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

Attached 6 probes now to largest rad in Living 2 – temps whilst ASHP runs (think caught just at a peak of a cycle, Grant panel said 39C in, I think ou...

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

It’s 10C outside according to Grant panel. 36.4C coming in according to my probe. 38C according to Grant panel (using the hold down return, see valu...

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

@derek-m Will see if can do some surface temps of that rad when ASHP is running at some point today. Photo attached of LLH whilst ASHP running th...

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

sorry Derek, think I keep replying then not seeing all your posts. Same with Toodles. water pump is after LLH before the zones yes. heat s...

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

So the smaller rad in living 2: 30.6C in / 27.3c out - 3.3C diff larger rad in Living 2 26.6C in / 29.4C out - wasn’t expecting that. This ...

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

@derek-m 3 zone valves. Only one water pump in plant room, set to speed 2/3. Apologies don’t have a diagram. 1 zone valve manually on for upstair...

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

Living room 1: 1063W requirement 2x Stelrads at 1784W have 0.301 correction factor at D20 = 1063/0.301 = 3531 covered by 3568 from rads 2x...

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

thanks, currently 29c TRV side, 28.5C lock shield side. ASHP off, showing 34C Just before heating zone (5C Drop to that rad it seems)

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

Ahh no sorry I probably wasn't clear. Zone setup and rads below - rad with probes now attached in bold (width x height in mm). Apologies if too...

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

Thanks @toodles , I've put 2 probes either side of a rad in the coldest downstairs room. Will give it time and report back. Unfortunately the ASHP i...

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

Can ignore that, I must have gone down to check at wrong time. It's 38C which is about right now, return is 36C, so it's close already. No doubt wil...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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