Hi Guys On one of our sites we have a NECS/BO904 chiller which has had numerous leaks on the coil normally where the copper pipe goes through the metal supports seems like when expanding and contracting its rubbing and eventually splitting the pipe the customer has yet to replace the coil so as you can imagine there is lots of sections been cut out. My question is has anyone else had this problem with these chillers or is it just ours? we have checked for excessive vibrations etc but all seems well so the only thing I can think of is the coils are dodgy esp because these units seem to been produced when R410A came in to play.