hello guys im new to the forum ,

can i ask you more experienced air con engineers a quick question?

Im at college doing my NVQ2 in air con / refrigeration and was wondering does anybody know where i can get a basic piping diagram of a VRV air con system?
ive tried daikin but no look,
What does the BEV unit do??The guy i work with is really un-helpfull and doesnt really explain why im doing what im doing , i just get told to do it

it would really help me if i could look at a diagram so i could see what im doing!!

any help would be greatly appreiciated

thanks alan