Viesmann Vitola 200 Boiler

Anyone ever inspect a Viesmann Vitola 200 high efficiency Boiler, The inspection I am doing tomorrow has one of these boilers being used for 12 zones controlling radiant heating and also as part of a hydroair system. It sounds like it might be a pretty complicated system and was wondering if anyone out there had any experience with these boilers and what I should be looking for. Are the burners accessible, etc. Thanks