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MikeFl
MikeFl
@mikefl
Member
Estimable Member
Joined: Apr 17, 2023
Last seen: Mar 23, 2026
Profile Activity
Topics: 1 / Replies: 127
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Reply
RE: Is the Grant controller a thermostat?

@sentinam Yes. Parameter '21 04'; the temperature at which the HP will be aiming at the high LWT value set in parameter '21 02'. By 'High LWT' I meant...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Is the Grant controller a thermostat?

@mab I think most have changed their low end to 0 from -4, I have. I guess once you're at zero, you'll need 'high LWT'. I'm getting the figures from...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Grant ASHP not reaching target temperatures

Hopefully things have improved now the cold snap has reached its end ... ? There are many (too many) parameters to consider to improve performance, ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Is the Grant controller a thermostat?

@mab As it's been seconds since any graphs were posted, here are two interesting ones from over the weekend, both showing a couple of defrost periods....

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Our Grant Aerona R32 13kW ASHP installation

@marvinator80 Who are you getting to service? Do you have a local engineer, or are you going to Grant via their "annual service plan"?

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Any Grant Aerona owners using their Low Loss Header immersion heater?

@jamespa This is what Grant recommend (insist?) on. There's no "if you fancy it" it's "this is how we want it done" for all Grant installs. Grant do...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Any Grant Aerona owners using their Low Loss Header immersion heater?

@marvinator80 No, these are parameters beginning '46' (see the linked document in my first post). Your LLH needs to have the immersion heater element ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Any Grant Aerona owners using their Low Loss Header immersion heater?

@jamespa Grant describe it as a "combined low loss header and volumiser". This bit of kit comes with all standard Grant installs, and has the flow/ret...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Any Grant Aerona owners using their Low Loss Header immersion heater?
2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Is the Grant controller a thermostat?

@mab My defrost cycles are still on-going, and have been for the last 66 hours solidly, apart from that hour when the HW heating happens, when LWT sho...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Is the Grant controller a thermostat?

@roamingbull Until yesterday evening they were what I got from the installer (WC was off, so I'm surprised these differ from the default values): 21...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is the Grant controller a thermostat?

I'm in a village in Cumbria, on the edge of the Lake District. Yesterday was one of those still days, with freezing fog hanging low to the ground; tod...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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