Hi guys, been on here for years but never really had anything to ask or add but love the site. ok so im 24 and a qualified refrigeration engineer but have only ever worked with ***** gases. i was out of work so i completed first year of a three year course studying building services in collage but i have been doing work experience for the summer with a company who does major ammonia installations. i have been offered full time work with this company, and this is great because a degree here dosnt mean a job, not by any means. so im looking for information on ammonia systems, how they work, system components, circuit diagrams, compressor pipework diagrams, oil circuits...ect. thanks v much in advance