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Gary
@gary
Member
Honorable Member
2644 kWhs
Joined: Feb 8, 2023
Last seen: Mar 10, 2025
Profile Activity
Topics: 1 / Replies: 304
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Reply
RE: Vaillant Arotherm ASHP gets noisier when it gets colder outside

@tallmarc stated noise levels are made at a defined outside temperature not the worst case which is what we currently have in the depths of winter, mi...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan ASHP general set-up and efficiency

@ngillam Depending on your controller the pump speed for the HW can be controlled in 2 ways newer versions have pump speed in the service menu for bot...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: ASHP for small garage and workshop

For such a small space wouldn’t A2A be better than A2W and you get cooling in summer.

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan ASHP general set-up and efficiency

As I said in a previous post your max duration is set to 90 mins you need to change it to at least as long as your schedule if you want it to heat for...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan ASHP general set-up and efficiency

The only suggestion I have is there is an eco and std setting for HW heating, if it’s on eco change it to std it will make the HP worker harder for t...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan ASHP general set-up and efficiency

So is a pump running constantly that is linked to the Heatmiser? if so, set it to be off when the hot water is heating see if that makes a differenc...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan ASHP general set-up and efficiency

So it will only run for 90 mins before shutting off and that currently isn’t long enough to reach your set temp In the HW schedule on the FTC when i...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan ASHP general set-up and efficiency

@ngillam that all looks normal it’s just defrosting

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan ASHP general set-up and efficiency

What does this mean do you have hot water being pumped round a circuit?

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan ASHP general set-up and efficiency

check what the HW pump is set to on the cylinder it should have 3 positions it should be on 3 which is the highest setting

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: The Definitive Guide to Weather Compensation and Curves for Air Source Heat Pumps

@rhh2348 There are 3 adjustments in the compensation curve menu, the left one adjusts where the colder OAT flow temps start, the middle one adjusts w...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan ASHP general set-up and efficiency

Flow and return are fine, what isn't is the rate at which it is changing. If I look at my HW run last night to get from 37C to 42C flow mine took 5 ...

2 months ago
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Air Source Heat Pumps (ASHPs)
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