Owners manual for Chicago Pneumatic Quiet Rotary Screw compressor units 10 to 15 HP. Includes part A: information for the user. General characteristics, operation, safety standards, danger zones, compressor room, transport and handling, installation, maintenance, list of spare parts, trouble shooting and emergency repairs. Part B: information for technically skilled personnel. Starting up, maintenance, changing oil and separating filter, belt tension, replacing the belt, flow diagram, pressure switch adjustment, dryer calibrations, wiring diagrams. 44 pages.