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JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: Dec 17, 2025
Topics: 19 / Replies: 3693
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RE: One Year Review: Grant 13kW ASHP - A Catalogue of Errors

@solenoid it sounds like you are making progress. No need to hurry these things and please feel free to ask any questions.

2 weeks ago
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RE: How good is the app support for your heat pump?

I think you are right about the ebus stick. It's certainly possible to change at least some of the exposed vaillant parameters through the ha integr...

2 weeks ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

Yes, you can work out a lot from a plot of FT. Interesting that there were both deep and shallow defrosts, for reasons I dont understand.  

2 weeks ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

OK thats a pity it would have been good to see if/how defrost changed as a result of switching off night shift and overnight there would have been ple...

2 weeks ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

My Vaillant was defrosting every 45-60mins overnight (chart shows FT). As you can see it doesnt fully recover from the defrosts because noise reducti...

2 weeks ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

Something odd about this diagram; the refrigerant is moving in the wrong direction for defrost - warm refrigerant from the compressor should be headin...

2 weeks ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

Thats a bit suspicious. Some (older?) heat pumps apparently defrost on a timed cycle rather than on demand. I wonder if these are in that category (...

2 weeks ago
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RE: Help me keep the faith with my air source heat pump installation

In short, like much on FB, this is nonsense. The amount of heat lost by the radiators to the room (which is what you care about) depends on the aver...

2 weeks ago
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