I checked the DHW only information and it shows a COP of 3.27 so the system appears to be using 1 kWhr which is being wasted?  Over the next 6 months, that strikes me quite a lot.

Which has prompted a slightly less glamorous, but very real question… what do you actually do with an old heat pump when it’s come to the end of its life and died?

Ours has been sat there for nearly seven years, and while all the focus is usually on spec, performance and installation, nobody really talks about the exit strategy. Disposal, recycling, strip-out… who handles it, what it costs, what can be salvaged and what just gets scrapped.

So I thought it was worth opening this up as a thread.

If you’ve had a unit removed:

• Who dealt with it — installer, manufacturer, or third party?
• Was it recycled, scrapped, or refurbished?
• Any costs or surprises?
• Anything you’d do differently?

We’re working through our own plan now and I’ll share exactly what we end up doing once it’s sorted, but it’d be useful to gather some real-world experiences in the meantime to help others in similar situations.

We are currently in the process of having ASHP installed and I'm finding myself getting a bit frustrated and would appreciate a sense check. 

I'm using an umbrella scheme as my dad is a heating engineer with 30 years experience though not really had any involvement with ASHPs. I've completed my own heat loss which showed about 8.7 kw, umbrella scheme calculated 9.3kw. I've just completed the install of the rads which should work to a flow temp of 45c -3c, though I have upsized a few of them which should enable us to drop the flow a couple of degrees. 

My installer (umbrella scheme) has recommended a specific brand (Panasonic) and their quote for supplying was £9.5k (just for the equipment). He has been fairly open from the start that we can order ourselves if we can find it cheaper (obviously this would be inclusive of VAT). The umbrella scheme also covers Daikin, Valliant & Mitsubishi. 

I have enquired a couple of times about going for other brands but he's heavily pushing us to Panasonic. I've had a look yesterday and I can't see why we couldn't use the Mitsubishi Ecodan which have a 10kw unit and come with a preplumbed cylinder. All for about £7k. For the Pansonic I can get this for about £7,300, if I source it myself and obviously wouldn't be preplumbed. I've found as well that Pansonic really don't seem to be transparent with the equipment supplied as well as a lack of 3rd party integrations that have got me a bit concerned. 

Is there anything I should be aware of that would favour one brand over the other? We are trying to be as cost effective as possible. The property had no central heating system so we have had to install everything from scratch, along with a never ending list of other things to sink money into. My dad feels as though we can't push back to much as at the end of the day he's got to sign everything off to get the grant. 

Thank you in advance. 

Am i being paranoid? What are your thoughts?

Hamilton

My questions are what is a MIM unit, what version might I require, and is it possible to DIY change one? What do folk think might be an alternative solution, if there is one? It appears very strange to me that the actual voltage during the DHW to Ch phase is not a steady 240v, or how an intermittent voltage  could be produced? I have spoken to a very helpful Samsung tech and he suggests that the NO or NC wire contacts on the valve itself have not been connected to the correct terminal contacts B16, & B17 on the control unit board?

Any ideas would be most gratefully received, as the replacement MIM prices I've looked at are 'pricey'!!!