Atlas Copco Standard Pneumatic reserves the right toalter the configuration of their compressors without notice1Installation and operating instructions for DirectaircompressorsRead all instructions carefully before starting the compressor1.1 General informationDirectair compressors exist in two types, D, which designatessingle-stage, and DT, which designates two-stage. The D'sare available 2 through 15 H P and the DT's, 2 through 25 H P.The D's are built for effective working pressures up to 150 psimax., and the DT's to 175 psi max. The compressors areavailable as power packs, which consist of the compressorblock, motor base, coupling, and motor, and as a completetank mounted unit1.1.1 Operation - D-seriesAir is drawn through the intake filter, intake manifold, andsuction discs into the cylinders. The air is compressed, thendischarged through the delivery discs to the temperaturereducer, where the heat of the compressed air Is partlyremoved. From the temperature reducer the compressed air isdischarged through the check valve into the tank.1.1.2 Operation - DT-seriesAir is drawn through the intake filter, intake manifold, and intothe low pressure cylinder where it is compressed, thendischarged through the delivery valve to the intercooler, wherethe heat from the first stage of compression is removed. Theair then enters the high pressure cylinder through the pulsationdamper and the suction disc where it is further compressed. Itis then discharged through the delivery disc to the cooling capsof the HP cylinder head and from there to the HP temperaturereducer. It is then discharged through the check valve into thetank1.2 VentilationThe compressor is equipped with a temperature reducer that isadequate under normal working conditions. Maximizingventilation at your installation will reduce condensation andgreatly enhance compressor life and efficiencyLocate compressor in a clean, cool, well ventilated area,preferably a separate room. DO NOT locate compressor neartoxic fumes, as they may affect compressor operationIf the compressor is placed in a room, it should be of adequatesize to allow for periodic maintenance. The room should havetwo openings for ventilation. One opening for intake of cool,clean outside air, preferably by using a fan (1). If a fan is notavailable the minimum size opening (1a) for the intake shouldbe 1'-6” x 1'-6” and should be placed on the lower portion ofthe wall. The other opening (2) allows for exhaust of hot, moistair, should be 1'-6” x 1'-6” and placed on the upper portion ofthe wall. See Drawing "A".If the compressor cannot be located in a separate room, somemeasures should be taken to allow outside air to be drawn inby the compressor intake. This can be accomplished by usingductwork (3). The ductwork should be canopied over theintake, as shown in Drawing "B". The smallest recommendedsize of the ductwork opening should be 1'-6” x1'-6”.3
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