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Crimson
@crimson
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Joined: Jan 16, 2024
Last seen: Nov 25, 2025
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Topics: 4 / Replies: 300
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RE: Grant 13kW Aerona3 - issues getting zones to temp

  No idea, they may have done that when did the 50L install, but didn't mention it. He was saying the primary circulating pump (one bottom ri...

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

…and it's not the water pump, ramped up to 28l/min - 30l/min, then quite soon after dropped to 20l/min. Thankfully Grant had the sense to also send ...

4 weeks ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Shortly installer is coming to replace the offending pump &/or the pcb controller (can't remember the term).   1 living room sitting at 1...

4 weeks ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

  Oh completely, he even said without the hydraulic break either a secondary pump would have taken over or it just would have obviously not bee...

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

  That's good to hear. I truly hope this 10 minute replace of the pump will do the job and I can sign off this project and move on!  

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

Here it is:   (Ignore lack of lagging for now, they're coming back tomorrow/Friday to sort that)

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

Hi @toodles , hope you're keeping well! It's been plumbed in as a 4 port LLH/volumiser combination. Much to my annoyance when the specialist wanted...

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

@jamespa be very interested to know your thoughts on this. A 6L LLH replaced with a 50L one…could that cause more issues? I'll hopefully have the ...

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

So another update! The 50L is in, the plumbers flushed and refilled system. They ran it for a good couple hours, and…… …the Grant ASHP kept shor...

4 weeks ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Gone with Fernox Alphi-11, relieves the installers concerns on no anti-freeze (glycol), and Eskimo got back to me saying it's all good. They've flus...

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

  They're here today, he brought both: Fernox F1 Fernox Alphi-11 - the one he'd like to use as combination inhibitor/anti-freeze  ...

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

Installers coming tomorrow. One has messaged messaging not got Fernox F1 but Fernox with antifreeze. What are thoughts on that? He’s happy for me to d...

4 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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