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Illustrious Member
Joined: Jan 20, 2022
Last seen: Aug 25, 2025
Profile Activity
Topics: 16 / Replies: 2434
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RE: Ecodan Legionella cycle - immersion heater problem

OK @clockworks - I agree with your analysis. So what you're seeing here is due to the relatively slow rate at which heat is rising in the tank. ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan Legionella cycle - immersion heater problem

I've just superimposed those and adjusted the x-axis to make the time-frames coincide... I think Mitsubishi need to justify the need to send the i...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Double heat pump for DHW?

Thanks Bob. For such an elderly plate heat exchanger, yours is in a cupboard which is remarkably free of cobwebs! So that others can see what we'r...

7 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Double heat pump for DHW?

Can we have a photo of that plate heat exchanger please @bobtskutter ? Plus your comments on why this is preferable to having a coil inside the cyli...

7 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Ecodan Legionella cycle - immersion heater problem

You are making all the 'right' points @clockworks ... which gives me a dilemma because I'm meant to be installing an internal-insulation wall this aft...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan Legionella cycle - immersion heater problem

There are randomised delays available... but they're not properly implemented,and sometimes not at all. All Smart Meters have a randomised offset to...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan Legionella cycle - immersion heater problem

I'll raise that with the DESNZ committee who are creating the 'Standard' for Demand Side Response de-coupling of heat-pumps from the grid. There are...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecidan Legionella cycle - immersion heater problem

Yes. You've got it. And you should definitely throw the problem back at the installers.You musn't have the thermostat in the immersion heater and th...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecidan Legionella cycle - immersion heater problem

Hi Clockworks. Have a look at this existing discussion about Ecodan - Legionella Operation Time and Target Temperature. Not only is there heaps of ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Insulating brass fittings in Loft

That's a fair point.The people we really need doing this pipe insulation work have OCD! "Felt'' may or may not be made from sheeps' wool.Its the...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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