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MikeFl
MikeFl
@mikefl
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Reputable Member
Joined: Apr 17, 2023
Last seen: May 8, 2025
Profile Activity
Topics: 1 / Replies: 117
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RE: Grant 13kW Aerona3 - issues getting zones to temp

@crimson A = Secondary circulation pump B = Magnetic filter C = Low Loss Header D = Flow Regulator? E = Diverter Valve? The question ...

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

The problem with looking at the flow and return temps on the controller is that they are constantly changing, so it might look good at one moment (and...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Updates and announcements

Same here - no notifications so far today. I did receive a notification around 15:00 yesterday, so it doesn't seem to coincide with the upgrade.

1 year ago
Forum
Introductions, Forum Rules & Updates
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RE: Grant 13kW Aerona3 - issues getting zones to temp

- can you clarify what this mean, please? Did you move into a property with the ASHP already installed (under a previous owner) or did you have the AS...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Defrost Cycles - How Common Are They?

@derek-m @iancalderbank In the Grant/Chofu docs it's referred to as 'defrost temperature', so that's what Ive labelled it. I'm guessing it's a tempera...

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

Those valves you show are either open or closed - there's no 'partially open' option. They should be in the 'auto' position (far right) but they have ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Defrost Cycles - How Common Are They?

I've noticed three types of Defrost Cycle (or at least their impacts on performance) which are all nicely shown in today's data. Overnight it was...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Defrost Cycles - How Common Are They?

Last Sunday, it was average -1.3C and very damp, so was in "defrost hell" which is every 40ish mins for a Grant: yesterday, it was +1.3C and dry, ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona circulation/system pump staying on

There's also a parameter (41 22 I think) which controls how long the system pump runs after the compressor is off. I don't think this can run to hours...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP flow through pipes is noisy and preventing us from using at night......looking for help.

@dannymoss23 Yes - Constant Curve is Constant Speed (constant speed is a poor name, but you can see why it is that). Proportional Pressure is NOT reco...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP flow through pipes is noisy and preventing us from using at night......looking for help.

Hi - two things I've found reduced the 'flow noise' I was getting, might help you too: 1. Check for trapped air in your system i.e. bleed rads, and ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona circulation/system pump staying on

43 13 = "Backup heater set point during Frost protection" which I guess means that if you have a backup heater, that's when it will start to help with...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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