PeterW Posted October 6, 2020 Share Posted October 6, 2020 That’s the puppy. All the way down to 30c and it will be fine. 1 Link to comment Share on other sites More sharing options...
Pete Posted October 7, 2020 Author Share Posted October 7, 2020 4 minutes ago, PeterW said: Zone valves aren’t your problem - it’s the mixer valve. As the water warms in the pipes it needs less “hot” water from the ASHP so the blending valve starts to close. Without either a low loss header or a buffer, the blending valve will restrict the flow, potentially causing you flow issues on the ASHP. On 20/07/2020 at 22:11, PeterW said: @Pete questions for you.. size of house Insulation levels Heat loss calcs done ..? Number of showers / bathrooms Plant room ..? UFH / Rads / Towel rails ..? Lets have that lot and then work out what’s needed ..! Moving forward now I am ready to start making decisions on what type of ASHP/tank and associated valves etc for my installation. You mentioned 9kw ASHP and a 400l cylinder so were is the best place to get these? I will also need buffer tanks so again what size/type do I need please? Hope this is an easy ask, if not then just direct me as to who ask please? TIA Link to comment Share on other sites More sharing options...
PeterW Posted October 7, 2020 Share Posted October 7, 2020 Cylinders2Go for the cylinder - 400 litre Heat Pump cylinder is change of £800. Mention the forum ... ASHP - depends on what you want (Mitsubishi/Panasonic etc) and how much you want to do yourself. Some need the unit to be installed by a registered installer to get the warranty, but a lot are just rebadged Carrier units and basically need one or two NVR switches to control them. Link to comment Share on other sites More sharing options...
Moonshine Posted October 7, 2020 Share Posted October 7, 2020 @PeterW i think i am going to have to ask you similar questions when i get that my information together! ? Link to comment Share on other sites More sharing options...
Pete Posted October 9, 2020 Author Share Posted October 9, 2020 On 07/10/2020 at 15:44, PeterW said: Cylinders2Go for the cylinder - 400 litre Heat Pump cylinder is change of £800. Mention the forum ... ASHP - depends on what you want (Mitsubishi/Panasonic etc) and how much you want to do yourself. Some need the unit to be installed by a registered installer to get the warranty, but a lot are just rebadged Carrier units and basically need one or two NVR switches to control them. Git a quote from Trevor for a 400l indirect cylinder with twin immersion for £1300 which is a tad more than £800. Trevor said it comes with expansion vessel etc so I assume this is a pre plumbed cylinder? Link to comment Share on other sites More sharing options...
PeterW Posted October 9, 2020 Share Posted October 9, 2020 4 hours ago, Pete said: Git a quote from Trevor for a 400l indirect cylinder with twin immersion for £1300 which is a tad more than £800. Trevor said it comes with expansion vessel etc so I assume this is a pre plumbed cylinder? nope they come as a box of bits so will be a 40 litre expansion vessel with a control set and two thermostats. Can’t see a bare 400 litre on the website but there is this : https://www.cylinders2go.co.uk/shop/renewable-energy/300-litre-telford-tempest-heat-pump-cylinder-twin-immersion-version/ £786 ex VAT..? They do a pre plumb at £1290 - sure he’s not quoted that ..?? Link to comment Share on other sites More sharing options...
Pete Posted October 9, 2020 Author Share Posted October 9, 2020 8 minutes ago, PeterW said: nope they come as a box of bits so will be a 40 litre expansion vessel with a control set and two thermostats. Can’t see a bare 400 litre on the website but there is this : https://www.cylinders2go.co.uk/shop/renewable-energy/300-litre-telford-tempest-heat-pump-cylinder-twin-immersion-version/ £786 ex VAT..? They do a pre plumb at £1290 - sure he’s not quoted that ..?? Will try him again. Thanks Link to comment Share on other sites More sharing options...
scottishjohn Posted October 9, 2020 Share Posted October 9, 2020 (edited) loking at that tank ,but twin coil -for solar and ASHP - set ASHP to 35c and that would allow solar to work most days of the year ,probably? maybe a thought - separate tank for DHW? Edited October 9, 2020 by scottishjohn Link to comment Share on other sites More sharing options...
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