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MikeFl
MikeFl
@mikefl
Member
Reputable Member
Joined: Apr 17, 2023
Last seen: Dec 21, 2025
Profile Activity
Topics: 1 / Replies: 126
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Reply
RE: Grant Aerona 13KW - can I boost it?

So far as I understand it, pressing the up/down has no effect (other than to change the number being shown). In the installation guide: "Please note...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona 3 Help programing

I wouldn't take the cover off the EP001 - just trace where those 4 white electric cables are going to. At least one will be carrying the control signa...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Icy cold weather, weather compensation and consumption

This will be my first winter with my HP, and it currently seems to be struggling ... it's been trying for 3 hours to hit the target LWT for 0°C (46.5)...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona 3 Help programing

Looking at your first picture, showing the HW cylinder, you can see (from the top) the HW Timer and Thermostat (these are controlling the DHW times), ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona 3 Help programing

It's hard to tell. Having the Chofu controller in the airing boiler room is generally where they are placed - and as such, the "internal temperature" ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Do setbacks save energy without compromising comfort?

@derek-m I'm trying to get decent data out of my Grant Aerona over modbus too. Sadly, it also provides low resolution data; key values such as LWT and...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona 3 Help programing

Your display is confusing to see on a Grant controller. The symbols you have highlighted ('On' means a Timer program is currently running; the clock s...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Rule change re ASHP

Attached as a PDF is anybody fancies a read.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Setting different temperatures throughout the day. Good idea for ASHP?

The standard advice is to only vary settings by a maximum of 2C throughout the day e.g. 20C when you're at home, 18C overnight, and 19C during daytime...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Help needed with Grant Aerona ASHP

I have a Grant, and the DHW timer sounds similar to yours (they are less than user-friendly), but you can check what the HP is trying to do by looking...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona Setback

It's being varied by the controller's WC - see below where I've just shown the 'Target LWT' vs OAT (and compressor freq) for that same time period; th...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona Setback

I suspect that different heat pumps employ different strategies to control their output, as I do see a spike on my Grant (most times) when it starts u...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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