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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Jan 15, 2026
Profile Activity
Topics: 20 / Replies: 3935
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Thanks. I had forgotton that particular feature. I presume the call for heat switches secondary pumps on/off not the heat pump. All of this is goi...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Daikin Short Cycle Query

Its the heat pump, more specifically the compressor, cycling on/off quickly. The most important parameter is the on time, anything less than about 1...

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

It will inevitably. If your heat pump capacity is perfectly matched to your house loss you can expect the heat pump to cycle from an OAT of roughly 1...

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

re 'enforced night mode running constant at 60%' are you saying that the heat pump was previously forced on (at 60% modulation) at night. If so thats...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Daikin Short Cycle Query

With the expanded view you can see it ticking along at about 300W other than during the DHW reheat and between 4.30 and 5am. The spikes are very narr...

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

OK, couple more questions At these relatively mild temps, how certain can you be that its not just a WC setting problem that would be resolved by le...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Daikin Short Cycle Query

Hmm   The spikes are very short (so quite possibly very little energy and thus of little significance) but too low to be just the water pump....

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Daikin Short Cycle Query

I would say yes. Have you got a buffer/LLH and secondary pump. How is is set up (thermostat? Weather compensation?). Are your emitters completely o...

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

You are doing a splendid job of cornering the installers, well done.   I have a couple of comments which may or may not help Just to ad...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is Your House Warmer Upstairs Than Downstairs?

Why arent you expecting them to make much difference. If the water flow is shut off completely they wont heat at all, and in principle the flow could...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Request for feedback on where we're at with our quest to get an ASHP or ideas.

Im assuming the m^2 refers to the outside the area of the house not the floor area, otherwise the calculation appears wrong. 7.46 ACH is really high ...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Request for feedback on where we're at with our quest to get an ASHP or ideas.

Ok. It still seems high tbh. Particularly if you do anything to improve the floors. My 200sq m house of similar basic construction with no floor ins...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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