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iancalderbank
@iancalderbank
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Joined: Oct 17, 2022
Last seen: Jan 14, 2025
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Topics: 0 / Replies: 643
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RE: Grant 13kW Aerona3 - issues getting zones to temp

@crimson if what you have told us about the pipework is correct, then the high number (code 9) should match the temperature on the pipe coming from ...

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

yes 3 bar is 30m but we're not up that high (Fortunately!) 13kw at DT5 = 37l/min. 2200 kh/g (annoying grant units). Mag one graphs, about 0.8 bar = ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Secondary pump speed - how much slower should it be?

@derek-m leaving aside the efficiency debate which we've done to death. have you ever seen system discussed on here where there a buffer tank thermis...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Secondary pump speed - how much slower should it be?

@jamespa when I read up on this way back, before being convinced that a buffer was totally unnecessary, I was pretty sure I learned that some heat pum...

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

possible. maybe. but doesn't remove the fact that the mag one is a socking great anchor on the system. This is normal if the hot water tank is al...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan help with efficiency setup and design - removing manifold mixers, LLH and pumps

@rich congratulations. For doing this, and also on having the confidence in yourself to do this in winter. albeit you did check the forecast 😉

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

@crimson personally I doubt there is anything wrong with the LLH as a device(as a system design, yes, we discussed that to death). Its a metal cylinde...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Need ASHP advice for old (1882) stable development in SW Scotland - where do I begin?

the best thing I can suggest is to hire heacol (but says he is vastly overworked and there is only 1 of him after all) the next best thing is to fin...

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

did they check the flow rate on the primary side as reported on the grant controller, wherever that might be? what was that value? one option to pr...

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

@crimson I don't know what rating the ASHP circulation pump is but there is clear maths in grant's own spec sheets that says the Mag One will be takin...

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

@crimson the internal pump may have been turned down also. but the primary side is badly implemented , has low flow, and will never work properly with...

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

no problem. £500 consultancy fee to myself from your plumber / installer / grant.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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