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JamesPa
@jamespa
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Joined: Apr 3, 2023
Last seen: Aug 28, 2025
Profile Activity
Topics: 17 / Replies: 2712
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

Yes absolutely. Exactly, the manifold has the equivalent of a radiator LSV and a radiator TRV (the actuator) together. With a radiator you a...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: What is the best strategy for operating a very oversized heat pump?

Oh definitely. Getting the WC curve optimised is a key part of the commissioning which, realistically, installers cant be expected to do because it n...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: What is the best strategy for operating a very oversized heat pump?

Thats an interesting one - as a matter of fact which (is it the Ecodan twin compressor model?) Indeed, loads of 'models' but in fact only one...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: What is the best strategy for operating a very oversized heat pump?

True, but the average householder isnt going to do this. Indeed so. Does it even need to happen though? Those who have responded want to 'tak...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

You need to follow a process Turn all room/central thermostats up to maximum Set the heat pump to run 24x7 Ensure that the Ecodan is in weather ...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Setback savings - fact or fiction?

Can you explain this please, the heat pump manufacturers always specify COP according to LWT. The compressed gas must be hotter than the LWT otherwis...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?

There is absolutely nothing wrong with buffer tanks in principle. The problem lies with the execution which all too frequently, it seems, involves poo...

6 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: Replacing knackered oil boiler with ASHP - Perthshire

On the basis that 1l oil = 10kWh and 1cu m wood = 2500kWh, the total is between 25+10=35 and 40+10=50 MWh per annum. That's definitely in the same ge...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

That's really scary, of all the settings it's the probably most important one, and one which the installers cannot possibly get right because they don...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Replacing knackered oil boiler with ASHP - Perthshire

Totally agree and I would be suspicious of the high loss estimates. Even if you did use the wood burners and know how much wood you burned you could ...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Adjusting 6kW Daikin's Weather Compensation Curve

If you get outdoor temperatures outside the range where the curve has a slope then yes. So if your oat goes below -2 with any frequency I would adjus...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Anyone able to provide some feedback before I make my finale decision? Samsung vs Baxi vs Vaillant

I think you are covering two points, namely water pump modulation and control strategy (weather compensation and/or room thermostats. I will deal wit...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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