You can find your Atlas Copco rep at: http://www.atlascopco.com/getonboard/nasa/us_onboard.nsf/framebuilder. They will have the appropriate parts list and instruction manual for your Z compressor. Please remember that you will void the warranty if the work is not performed by a factory...
Call your Sullair representative. Most manufacturers offer recommendations such as "the ducting must be sized so that there is only .12 inches of water drop in or out of the air ducts" or may be able to give you a recommended layout.
CompressorProfessor http://www.compressoroils.com
A good resource for information is at www.compressedairchallenge.org They have tools and information to help industrial users lower their air needs. "The Compressed Air Challenge is a voluntary collaboration of industrial users; manufacturers, distributors and their associations; consultants...
Jakaodrz,
Oil carrover is typically 2-3 ppm in new oil lubricated rotary screw compressors, which means that over the course of a calendar year, you will be putting gallons of oil down your air line. As compressors age the oil carryover can be greater, and as the filters become clogged the oil...