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JamesPa
JamesPa
@jamespa
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Joined: Apr 3, 2023
Last seen: Oct 10, 2026
Profile Activity
Topics: 27 / Replies: 5479
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Reply
RE: Replacing my 18 month old Hitachi Yutaki ASHP

Apart from the oversized heat pump and the solar gain, do you have any other problems in terms of comfort or running cost? Im guessing it cycles a fa...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

Simon thanks. If you have the time perhaps you could look at the past 2 pages of posts. Essentially OP is operating his heat pump on a fixed flow ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Flow rate discrepancy between ASHP and manifold

Air release valves dont always work! You are gonna have to do some experiments if you want to know more, like closing loops down and seeing if that ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Replacing my 18 month old Hitachi Yutaki ASHP

Fair enough. I recommend quizzing him to get your money's worth!  

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Replacing my 18 month old Hitachi Yutaki ASHP

Wow thats a lot, I think Id be flipping the dips myself! I hope it all works out in the end. It should but as previously stated I cant guarantee. ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Replacing my 18 month old Hitachi Yutaki ASHP

  That all sounds good. Basically two switches to flip. Will the engineer visit for free? Its going to take all of 10mins including taking o...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Replacing my 18 month old Hitachi Yutaki ASHP

@jamespa Looking at setting up the weather compensation. I know from the building that 32C is fine for temperatures below 0C and 5C. But don’t k...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Replacing my 18 month old Hitachi Yutaki ASHP

I dont think it tells us anything else other than the time it takes constant for getting the slab to equilibrium at the specific flow temperature (whi...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Help…my NIBE heat pump has faulted again!

If it happens only when it gets cold then it maybe that the heat pump tries to increase flow rate at lower outside temps/higher flow temps, and fails ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Flow rate discrepancy between ASHP and manifold

Hmm. What do sensors do if you close 1 or 2 loops down. Does that give a clue. Tbh, apart from faulty sensor, I can't see what this is. Maybe othe...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Flow rate discrepancy between ASHP and manifold

Have you got a buffer tank, low loss header or plate heat exchanger between ashp and manifold? If so there could genuinely be different flow rates!

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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