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iancalderbank

@iancalderbank

Contributor

Prominent Member

Joined: Oct 17, 2022
Last seen: Jan 14, 2025

Topics: 0 / Replies: 643

AllTopicsReplies

RE: Grant 13kW Aerona3 - issues getting zones to temp

@crimson crossed in the post at the same time . See previous. I know what the issue is.

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Grant 13kW Aerona3 - issues getting zones to temp

@crimson I've just been back through the thread and found your close up photos of the "flow thing" and the mag filter. Good and Bad news I'm afraid. ...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Grant 13kW Aerona3 - issues getting zones to temp

@crimson when you say "a flow rate shown on the bottom right pipe". that must be the cold return to the HP . so that would imply there IS a flow rate ...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Secondary pump speed - how much slower should it be?

that makes total sense in terms of buffer theory. I wasn't aware though that any HP vendor had a control setup that takes care of this and I've not s...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Grant 13kW Aerona3 - issues getting zones to temp

@crimson I've lost track a wee bit. Is there a slow flow rate issue on the primary side? as that is a possible explanation for the numbers you see. ...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Grant 13kW Aerona3 - issues getting zones to temp

obviously not the values that we're hoping for in terms of a working system but at least you have numbers you can quote to the installers now to prove...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Hot water issue, never seen this before: Grant Heat Pump and Cylinder

@marvinator80 no thats one of these stops your cylinder blowing up if its gets too hot or high pressure due to some control error. one of the pip...

2 years ago

Forum

Domestic Hot Water & Cylinders

RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

ok, we're in violent agreement 🙂 amusing complete off topic... I happen to be Bass Trombone player in my leisure time. you can get a lot of ene...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Rethinking High-Temperature Heat Pumps

I agree with both of you in different ways. To me, HT heat pumps are a somewhat quick-n-dirty fix to allow a HP to replace a boiler (ish), with mini...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

agree. I've always thought a mandatory qualification for a plumber is to be wiry, with very strong but thin arms. had one once who was my build (flank...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Hot water issue, never seen this before: Grant Heat Pump and Cylinder

@marvinator80 its not a grant specific component. Find the hot water output pipe coming out the cylinder and follow it. something like this

2 years ago

Forum

Domestic Hot Water & Cylinders

RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

and I am still sure also. we just need to be clear we are talking about the right things: your system has a throughput problem, because of the und...

2 years ago

Forum