Medway Multipoint & Thermal Store

DIYSOS · 2005-03-20T14:49:46+00:00

In a post a few days ago, off-topic I mentioned (in Jest!) using an old 23KWgas multipoint water heater to heat a thermal store for a new CH system. Itended with me thinking I'd ditch the multipoint to make way for thecylinder. Err, well... see below.First, a question relating to thermal stores. To promote a cool returntemperature I'm contemplating that I may (or may not!) need to run my1300mm/210L store at a lower temperature - say 70 degr rather than 80. Tocompensate, I was going to get Newarkcyl to add one or two alternativetappings a bit higher up the cyl for the space heating take-off. But I'mworking blind, I don't have the foggiest what the existing returntemperatures will be, or where to ask for the extra holes to be. Any ideas?And one other thing, what is the difference between a 'vented' CH boiler anda multipoint - both just heat water don't they (:->).I just couln't let go of the idea of a free (installed) CH boiler. There*will* be a thermal store - the only issue now is what & where the boilerwill be. If the council don't object on Part L (It's an existing boiler)then I'll hook up the multipoint. I now plan to put the store on the groundfloor, under the stairs in the middle of the house. The primary pipes willrun to the multipoint boiler along a path that will run close to the (groundfloor) siting of any new Condenser boiler - if and when that happens. F&Etanks in the loft. Pumps near to the store (maybe).At the moment I'm now planning on doing it as Dr Evil suggested - integratedwith common primary water to boiler, store and radiators. There might berisk of the Fernoxified, sludgy brown water affecting the multipoit'srubbery flow sensors? but I'll take a chance. And as the store is nowdownstairs, in the event of a catastrophic leak upstairs at least thecylinder contents wouldn't add to the flood.One thing that occurred to me is that the water in the multipoint wouldgenerally be hotter than if heating from the cold mains. And as the pressurevia the F&E...

Mar 20, 2005 20 Replies

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Doctor Evil 21 years ago

True, but don't help it along when you can avoid it. The innards are pretty rustproof.

I think there was. Wire the lot up using a terminal box. Have "all" components: cyl stats, programmers/stats, pumps, boiler, etc into the box. Then take a flex to a 3-pin plug.

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