PeterW Posted May 28, 2016 Share Posted May 28, 2016 https://www.ebay.co.uk/itm/272209537849 6.7kw - not sure if use to anyone here but brand new Edit: just looked and has a couple of larger ones too Link to comment Share on other sites More sharing options...
ProDave Posted May 28, 2016 Share Posted May 28, 2016 That would suit me fine I am sure, but it's too early in my project. So do I buy it now, or take the gamble that in a year or whatever when I really need it that I will be able to find another at that price? Link to comment Share on other sites More sharing options...
Stones Posted May 28, 2016 Share Posted May 28, 2016 Link says the listing has been removed. Link to comment Share on other sites More sharing options...
ProDave Posted May 28, 2016 Share Posted May 28, 2016 I think the original link got corrupted. I just copied and pasted the item number. Try this link http://www.ebay.co.uk/itm/Delonghi-AWR-MTD-0011-Heat-Pump-/272209537849?hash=item3f60f3eb39:g:ESIAAOSwbwlXDP1I Link to comment Share on other sites More sharing options...
Stones Posted May 28, 2016 Share Posted May 28, 2016 (edited) Got it, thanks. Obviously someone else clearing out non ERP marked heat pumps. I've emailed to try and establish what comes with the heat pump in terms of a controller, spares availability etc. Edited May 28, 2016 by Stones Link to comment Share on other sites More sharing options...
Stones Posted May 28, 2016 Share Posted May 28, 2016 (edited) Data sheet for the unit here http://www.ecoheatjersey.com/MTD_AS_Data_Sheet__2_.pdf The brochure talks about a modulating fan, but not an inverter driven compressor (although it does refer to a soft start). Information on Delonghi heat pump products seems to be a bit thin on the ground. Edited May 28, 2016 by Stones Link to comment Share on other sites More sharing options...
Stones Posted May 30, 2016 Share Posted May 30, 2016 Just spoken to the vendor. These are FIXED speed units rather than inverter controlled. Control unit is integral to the heat pump itself. They are a good price, but I'm struggling to find a way of justifying the installation of a fixed speed unit. To make it work, I think a reasonable sized buffer would be required. Taking my house as an example, my heat loss calcs show that I'll need 1.3 kWh heat input at 0C ambient. A 200 litre buffer, assuming a target buffer tank temperature of 35C, and a delta T of 10C, would require 2.2kWh of heat input from the heat pump. Roughly speaking that would see it running for 20 - 25 minutes then off for an hour then back on. Not ideal compared to an inverter controlled heat pump. Link to comment Share on other sites More sharing options...
ProDave Posted May 30, 2016 Share Posted May 30, 2016 It would be the noise of a fixed speed one that bothers me. I would rather have an inverter driven one ticking over near silently for a long time, rather than a fixed speed one running at full chat for bursts. Link to comment Share on other sites More sharing options...
Stones Posted May 30, 2016 Share Posted May 30, 2016 That's the biggest issue for me as well, although having to fit a fairly large buffer tank would be a pain I would rather avoid. I've only ever heard ASHPs working under part load, and they have all been whisper quiet. The other concern is how prone are fixed speed units to icing up, compared to an inverter which will just be ticking over and under little stress. I know from the EAHP I had in my last house (small fixed speed compressor) that it iced up after 45 minutes and required 15 minutes defrosting. Link to comment Share on other sites More sharing options...
PeterW Posted June 3, 2016 Author Share Posted June 3, 2016 Just checked and these are Climaveneta units - made by Mitsubishi basically ! I've asked for the manual but they seem pretty reasonable - not sure where I'm going to put it yet... Link to comment Share on other sites More sharing options...
Stones Posted June 3, 2016 Share Posted June 3, 2016 Just to reiterate these are fixed speed rather than inverter driven units. Link to comment Share on other sites More sharing options...
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