How do you plumb a dual central heating system

[Fred]

Hi , I have an existing solid fuel heating system and I want to connect up an oil fired boiler to it.

Please advise on how I should plumb it, I believe I should use some check valves but not sure where they should go. Also do I need another circulating pump

thanks

Fred

[Greg-EE]

How do you expect someone to answer you post with so little information on such a complicated system?

[HA HA Budys Here]

You need to look at the system in 2 parts, heat source and distribution. Now you're adding a second heat source, so it has to be plumbed in tandem, or parallel with the existing source.

Use check valves to prevent one source from heating the other unused source.

[Fred]

Well I suppose I thought someone with more expierience than me might be able to give me some info. or perhaps a typical flow circuit showing where the check valves would go etc. Apologies if this is oversimplfying things. What more info would I need to give.

[Fred]

Is one type of check valve more suited than the other i.e. spring or flap type

Thanks for the reply,

Fred