linking a 3 zoned heating system to a indirect cylinder

[Mgrant]

Hey how would a zoned heating system with 3 zones heated by a system boiler be linked to an indirect hot water cylinder. Would a seperate flow and return need to be taken from the boiler to the cylinder. Or could the flow and return to the cylinder be off one of the heating zones? Thanks for any help on this I havent linked a boiler with multiple heating zoned to an indirect cylinder before. Just a single zoned one piped up like an S-plan.

 

[SimonG]

Seperate flow and return with 2 port valve.

 

[AWheating]

cylinder requires seperate controls via a timer, cylinder stat and whatever zone valve you want to fit.

i would either run boiler primarys to cylinder cub, and all heating zones aswell and fit the plan there or run all zones inc. cylinder to boiler and fit the plan next to the boiler.

It all depends on space really. But its always best to keep controls in one place.

 

[Mgrant]

ok thanks, so it would need a seperate flow and return from the boiler to the cylinder with a two port valve near the cylinder on the flow? All the heating zone valves will be near the boiler piped up through a low loss header each zone having its own pump.

 

[Mgrant]

Would the boiler primaryies going to the cylinder need a seperate pump too?

 

[chris watkins]

James1, the use of a LLH changes things some what. What kind of header are you using & why ? (is it just 2 in -2 out)
Depending on the size of the system you can just have one pump for the heating but I would stick to separate F&R to cylinder with pump & 2 port to suit.
IMHO the term primaries don't really apply in LLH unless you say it is the pipework to & from the boiler only ?