E
Ermintrude
Yeh pump on heating side and use pumps on boilers. If using LLH recommended to fit nrv on returns of boilers. As if using plate u will need to tee both boilers together before plate
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Yeh pump on heating side and use pumps on boilers. If using LLH recommended to fit nrv on returns of boilers. As if using plate u will need to tee both boilers together before plate
Thanks for that Erm, i suppose I shouldn't need the LLH if I'm using the plate ? as I noticed the Worcester LLH only has 3 zones & I need 4. First time I've used a plate so learning as I go here.
Sorry poorly explained. Both boilers will need to be linked so at the plate u have one flow and one return. To prevent boilers from pushing against each other or bypassing u will need nrv .
Why would u need bypass? Plate always open. Or were u going to zone the plate and the unvented?
Zones easy. S/l from timer ( master 7 day) each zone as prog stat in series. Then contacts all s/l back to boiler . Pump controlled by boiler s/l ( assuming single phase)?signal.
Wouldn't boilers last a little longer and wouldn't u feel a bit better running them to a small LLH and then pump off to plate And pump and valve off to cyl?
This was the one I was looking at
http://www.worcester-bosch.co.uk/cache/file/31/cascading-greenstar-regular-gas-boilers.pdf
Still a zone short though
appreciate your advise it's helped me get my head round it a bit more.
been following this without commenting what does a low loss header do that oversized pipework doesnt ?years ago we fitted 4 vaillants in a boiler room replacing a 300000 boiler and just run a 42mm flow and return with a bypass at the end and teed of of that for each circuit ,feed and vent and it worked fine pumps in each boiler and large circuit dual pump set
One on first page looked ideal. Two ports for unvented and one for plate?
Try VA heating for a LLH on 01782 845633.
Used them a fair few times for LLHs made to spec. Do the sizing, give them a drawing and away they go. Good value too!
Don't forget balancing valves on returns
Will you guys tell me how you intend to set up the DRVs please I would love to know, hold th'and onto F/R,
Gate valves have served us well on domestic for the last 60 years, why all of a sudden is UPK going commercial using DRV, WB went a bit over-board on their LLH drawing me thinks.
I've got to go back a replace. 5 28mm altech gate valves on a school used for balancing the gland nuts don't thread on properly and it looks a mess as they are weeping when hot
Nothing. It's a system-wide problem. Someone has turned off "add attachments". It's been reported but, so far, nothing has benn done about it.I can't upload any photos any more just get URL link only what am I doing wrong?
Nothing. It's a system-wide problem. Someone has turned off "add attachments". It's been reported but, so far, nothing has benn done about it.
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