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JamesPa
JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: May 18, 2026
Topics: 24 / Replies: 4848
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RE: Help needed with Grant Aerona 3 issues

Ok please post back once experiment complete. Give it a couple of hours to be sure. Ok looks like you have an llh which makes fault diagnosis mo...

5 months ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread

You are in essence right. Adia only works with selected heat pumps and I dont think cosy is one of them. Don't worry, none of this is necessary if ...

5 months ago
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RE: Help needed with Grant Aerona 3 issues

I hear what you say but I would still perform the experiment it to be absolutely certain. Some thermostats, which should never be used with heat pump...

5 months ago
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RE: Help needed with Grant Aerona 3 issues

The black cylinder in the second photo looks like an llh. Is there a water pump nearby and how many pipes feed it? You can't ignore the fault wheth...

5 months ago
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RE: Changing from 4-port buffer to volumizer

Here are my comments, others may have something to add or even dispute what Im suggesting. 1 - Yes ideally, but it doesnt matter that much so not so...

5 months ago
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RE: What suggestions to give to someone with a buffer tank - how best to set an unnecessary buffer tank up

Possibly, but it would also reduce DeltaT across the emitters which means that mixing matters less. With a small buffer tank (such as 50l commonly fi...

5 months ago
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RE: Help needed with Grant Aerona 3 issues

@fleurcules   Welcome to the forum and hopefully we can help. Im not a Grant expert but will try to offer general advice, but first a couple...

5 months ago
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RE: ASHP sizing - value of Heat Transfer Coefficient

Sorry, but I cant see what the point of this is unless its to take the mick from a serious topic (and possibly also of science). Its not even funny b...

5 months ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread

TRV heads do indeed close completely once room temp is reached (or thereabouts), by depressing the pin on the valve fully. However there is a degree ...

5 months ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread

Yes. In addition or instead. The point us that trv bodies with decorations caps offer an alternative (or additional) and more linear adjustment mec...

5 months ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread

Yes. In addition or instead. The point us that trv bodies with decorations caps offer an alternative (or additional) and more linear adjustment mec...

5 months ago
Reply
RE: System pressure and COP

Provided it's sufficient I can't think of any reason in physics why system pressure would affect cop

5 months ago
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