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AllyFish
@allyfish
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Noble Member
Joined: Oct 31, 2022
Last seen: Nov 5, 2025
Profile Activity
Topics: 23 / Replies: 485
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Hi @crimson, probably time to bite the bullet and get the system checked over by Grant. The installation manual from Grant has suggested circuits for ...

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

Some progress on the hot water. Reducing the flow on the secondary side to balance with the deficient flow on the primary side is a sticking plaster. ...

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

@crimson small steps towards a resolution. The flow rate is a biggie, that needs fixing. That will be throwing a spanner in the works in the LLH if th...

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

Hi @crimson, the flow rate is constant for Grant systems, as they have a fixed speed pump in the ASHP. If your primary flow rate is 9l/min, and the fl...

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

@crimson - is that flow rate photo taken with the ASHP running? It's showing a flow rate about 9 litres/minute. If so, that's way below Grant's minimu...

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

Most Grant Aerona ASHPs work on a DT of 5degC, they will push up to 8degC, but seem happiest with a low DT. If you are in the habit of turning the hea...

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

Psychrometric trickery this week. It's cold outside, but low relative humidity. The sort of 'dry cold weather' that Scandinavia routinely gets, and wh...

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

Hi @richw, there should be manual bleed valves on your piping or Low Loss Header/Volumiser if fitted. (Items 10 and 11 on diagram) If you don't have a...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat Pump system needed for market garden

You get what you pay for. You can do it on the cheap, and for a DIY project why not? It's a bit of fun and you can get some bargains. It it is for a b...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat Pump system needed for market garden

Hi @Geo3geo, I tried to reply the other day but the forum was playing up. Storage temperature of 1degC is way below that which comfort cooling split a...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Homely launched for Grant Aerona ASHP control

Here's the Grant website details for their smart controller. Product is supposed to be available to the trade from Feb 2024 so I've heard. No gra...

2 years ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Homely launched for Grant Aerona ASHP control

Grant has started the LinkedIn teasers for the launch of their Smart Controller in the New Year. I'm not getting much info out of them directly at the...

2 years ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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