Biomass connection to wood boiler stove

[Madmaxjsy]

Hello

I already have a Charnwood island 3b in a sealed system with all the necessary safety bits in place IE: ladomat LTC100, 100 degrees escape valve etc, without a buffer tank, working great for 10 years.

Question: half my house ( big house) isn't heated so I'm wanting to add a biomass boiler/ buffer tank to the system, any official diagrams out there?
Appreciate your time.
I'm in France Normandy btw.

Tony