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JamesPa

@jamespa

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Illustrious Member

Joined: Apr 3, 2023
Last seen: Jan 13, 2026

Topics: 20 / Replies: 3926

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RE: Replacing my 18 month old Hitachi Yutaki ASHP

Understood, its your house and your heat pump so take all the time you need. I will respond to queries but otherwise wont post again until I hear fro...

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Replacing my 18 month old Hitachi Yutaki ASHP

OK noted, although I dont think any of the charts posted show this. This one definitely seems like human intervention not defrost because of when the...

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Replacing my 18 month old Hitachi Yutaki ASHP

Ah that makes sense. I think 'off' is actually 'setback' rather than truly off, which is clearly what has happened, a 3C setback in the target flow t...

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Electricity price predictions

@transparent All I can say is that I admire your optimism!

2 months ago

Forum

Electricity, Tariffs, Monitoring & Providers

RE: Replacing my 18 month old Hitachi Yutaki ASHP

No, the fact that flow temperature reduces by ~3-4 C during nighttime hours (I havent yet worked out the exact hours) regardless of whether defrosting...

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Electricity price predictions

Nope, that doesn't work either. Apparently (according to the politicians and their supporters I spoke to on our local high street) climate change isn...

2 months ago

Forum

Electricity, Tariffs, Monitoring & Providers

RE: Electricity price predictions

2 months ago

Forum

Electricity, Tariffs, Monitoring & Providers

RE: Replacing my 18 month old Hitachi Yutaki ASHP

Sorry but I dont know. There must be something causing this timing so, if it matters, which I think it does, it needs to be found. If you think it d...

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Electricity price predictions

Really, bear in mind their policies. I think they will not care about evidence because it supports the ideology. So far as I can tell from a long di...

2 months ago

Forum

Electricity, Tariffs, Monitoring & Providers

RE: Replacing my 18 month old Hitachi Yutaki ASHP

Something is causing this to occur and it must presumably be a setting. Somehow you will need to find it if its not to cause downstream problems &n...

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Replacing my 18 month old Hitachi Yutaki ASHP

Pages 56 on in the manual. Somewhere you will find a heating schedule. You may not find an 'eco' setting, but setting the pump 'off' probab...

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Replacing my 18 month old Hitachi Yutaki ASHP

Setback is in the user menu - time clock/schedule or similar.

2 months ago

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