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JamesPa
JamesPa
@jamespa
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Joined: Apr 3, 2023
Last seen: Nov 11, 2026
Topics: 28 / Replies: 5587
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

Im sorry to hear about the stress, just bear in mind that this is an expensive time of year, you wont be paying for heating at all in Summer, and ther...

2 years ago
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

@sandman1600 Id be interested to hear how are things going in terms of flow temperature and stability of house temperature? You may find that, as yo...

2 years ago
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RE: Heat Pump Sizing & Installation Costs

2024 200sqm 7kW 200l UVC 2 new rads, one new fancoil, one existing rad relocated (total 4 rads changed) 16A feed for heat pump already in pl...

2 years ago
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

A pair of similar tanks one white and one red are expansion tanks. You can tell because they have a filling nipple at the top and only one pipe leadi...

2 years ago
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RE: Setback savings - fact or fiction?

You are almost right and have appreciated the key point ie that energy lost must be replaced (simple minded, and incorrect, thinking says that if you ...

2 years ago
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

Based on the numbers I think its likely its oversized. Not a disaster but it means it will probably cycle on and off a lot. If does prove to be over...

2 years ago
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

That sounds high for UFH. Strongly recommend you follow the procedure I outlined upthread and report back. You should hopefully be looking at a flow...

2 years ago
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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...

2 years ago
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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...

2 years ago
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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...

2 years ago
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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...

2 years ago
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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 ...

2 years ago
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