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HarriUp
@harriup
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Joined: Nov 25, 2021
Last seen: Jun 28, 2025
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Topics: 1 / Replies: 107
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RE: Sensors positioning for Ecodan 8.5kw ASHP with pre-plumbed cylinder and buffer

I only know the odd bit that I have read about buffers, and that they are a source of divergent opinions. My understanding is one would provide some h...

2 years ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Ecodan. How to run this efficiently with zero understanding.

@john-connett PWM control has been discussed elsewhere and I think the opinion is that it is not functional in the Mitsubishi system. Perhaps the boa...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mitsubishi 8kW - strange energy use readings

It seems a shame that Mitsubishi can't or won't explain the misreporting of energy consumed, I wonder whether it is a data recording issue rather than...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP uses 12500units annually

@beagles Can you clarify – is 12,500kWh your total house electricity usage or the annual consumption reported by the heat pump? Does it give you a fig...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan Compensation Curve Minimum Temp 25 Degrees

Well, generally a heating system is controlled by demand rather than another parameter. Even if you could lower the compensation curve further it woul...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: My Mitsubishi ASHP has used 1078kWh from 25 November to 31 December – Help please

Is it the service manual you have for reference? At the bottom of page 6 it states the water flow rate range is 10.0 to 24.8 l/m. Similar to mine, tho...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: My Mitsubishi ASHP has used 1078kWh from 25 November to 31 December – Help please

The right hand pump, which circulates the tank's water through the heat exchanger, I believe should be set to II not III.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: My Mitsubishi ASHP has used 1078kWh from 25 November to 31 December – Help please

The leftmost pump is the heating circuit circulation pump and the central pump is the primary circulation, ie the one that will always function when t...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: My Mitsubishi ASHP has used 1078kWh from 25 November to 31 December – Help please

Given that your living room wasn't getting up to target with a fixed flow of 40° then it is not surprising that changing it to a lower variable temp f...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How to set the warm end of the weather compensation curve when it's not warm

There was thread somewhere recently, which I can't find now, where someone had a DHW pump that was running continuously. That would be annoying but no...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How to set the warm end of the weather compensation curve when it's not warm

Apologies for the previous post which was my failed attempt to quote from the original – hopefully it will disappear!Here are a few thoughts on differ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How to set the warm end of the weather compensation curve when it's not warm

Hi, I am very new to all this! How do I set the warm end of the weather compensation curve when it’s not warm outside? We’ve got a Mitsubishi Ecoda...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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