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DaveW
@davew
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Joined: Jan 13, 2023
Last seen: Jan 12, 2025
Profile Activity
Topics: 0 / Replies: 42
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Reply
RE: Ecodan. How to run this efficiently with zero understanding.

Hi Derek, What a result!!............Changed the pump connector to CNP4 and pump no longer runs unless required by DHW call for heat.........proved i...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan. How to run this efficiently with zero understanding.

@DerekM Hi Derek, I have not yet tried swapping the DHW pump connection over although as you have said and from looking through all online manuals...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan. How to run this efficiently with zero understanding.

@derek-m Thanks for your advice Derek.....my system is out of warranty with the installer so I think I will come clean and let them know I have fou...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan. How to run this efficiently with zero understanding.

@harriup The wiring is not correct and the DHW pump is running all the time the primary pump is running....see latest post to @derekm I only run t...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan. How to run this efficiently with zero understanding.

Hi Derek, Been back up in the loft (Big mistake that was)! , and traced cables from pumps to the FTC board As we suspected the FTC is not wired a...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan. How to run this efficiently with zero understanding.

Hi Derek....no wonder you were not at your peak with the amount of input you contribute to the forums. Your assumption of my query could be correct ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan. How to run this efficiently with zero understanding.

Agree it looks a bit like a rat's nest!! I think I differ in that I have an external plate heat exchanger (not the internal coil )and the dedicated ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan. How to run this efficiently with zero understanding.

Derek....if you zoom in I think the model no's can be seen but I can clarify the auto pump is UPM3 Auto L(think this is the heating circuit pump)........

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan. How to run this efficiently with zero understanding.

The unit came all prewired and plumbed from Mitsubishi so it sounds like it has to be as you have said...I think I will give mitsubishi a call on this...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan. How to run this efficiently with zero understanding.

Hi Derek, Photos as requested, the pump without any obvious manual control is the one adjacent to the one with LED display(the one that data sheets ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan. How to run this efficiently with zero understanding.

@Sun&Air...thanks for your comments......a lot of water has passed under the bridge since I posted back on page 5 so things have got a bit disjoi...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan. How to run this efficiently with zero understanding.

@derekm and everyone else 😄 I said that I would investigate in more detail what is happening with my full mitsubishi packaged system pumps and have ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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