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HughF
@hughf
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Noble Member
Joined: May 2, 2022
Last seen: May 5, 2025
Profile Activity
Topics: 6 / Replies: 482
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RE: Yearly maintenance

Yea, you can do it by measuring the temps and pressures at certain points of the system. Then you calculate what the correct values would be for the f...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Yearly maintenance

it’s very difficult to measure the charge, it is weighed in when filled at the factory. And there aren’t anywhere near enough f gas qualified technici...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: 17kw Grant Aerona heat pump not performing

@heacol is the man…. But he’s very busy.

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi ecodan 11kW ridiculously expensive running costs. Help!

Agreed, going direct would bring a benefit on efficiency. Can the ecodan drive a pwm primary pump? I haven’t checked the wiring diagrams .

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi ecodan 11kW ridiculously expensive running costs. Help!

Cycling looks fine to me, not too short. It’s bubbling along at 6.5kW ish, all night. Heat loss is very good for something that’s 400 square meters. W...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi ecodan 11kW ridiculously expensive running costs. Help!

Ok, so the primary pump is not pwm controlled so the heat pump isn’t able to modulate it’s flow. Not the end of the world but certainly not the most e...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi ecodan 11kW ridiculously expensive running costs. Help!

How many cables go to this pump? It will either be one, or two. With the ecodan controller located in the airing cupboard, your system is installed ...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi ecodan 11kW ridiculously expensive running costs. Help!

Is the controller in the hallway or in the cylinder cupboard? and I’m asking for photos so I can map out the plumbing layout…. It saves me asking yo...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi ecodan 11kW ridiculously expensive running costs. Help!

Please provide some photos of these items so we can identify versions etc…. please also photograph the unvented cylinder and associated pipework

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi ecodan 11kW ridiculously expensive running costs. Help!

OK, so you are paying 34p/kWh - good... Then my above maths adds up. We just need to get these settings tweaked so that the weather compensation is ...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi ecodan 11kW ridiculously expensive running costs. Help!

Please give us more details, are you currently on a TOU tariff? If you’re paying 48p/kWh then that would suggest so. In which case there are some op...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi ecodan 11kW ridiculously expensive running costs. Help!

@parmstar tell your supplier you’re struggling to pay, they’ll put you onto prepayment and you’ll automatically end up on the backstop rate. Easy way ...

3 years ago
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Air Source Heat Pumps (ASHPs)
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