3. Keep the inlet and exhaust apertures free of obstructions so that the cooling air can flow freelythrough the room.4. Ensure clean air in order to support the proper functioning of the machine.5.2.3 Exhaust duct designThe machine can only overcome the air resistance at the cooling air inlet and exhaust determinedby the duct design. Any additional air resistance will reduce airflow and deteriorate machine cool‐ing.➤ Consult the KAESER service representative before deciding on:■ the design of the exhaust air ducting■ the intersection between the machine and the exhaust air duct■ the length of the ducting■ the number of duct bends■ the design of flaps or shuttersUse only motorised ventilation flaps and louvers on variable frequency drive (SFC) machines.Flaps or shutters that are opened by the the action of airflow against the force of gravity donot open sufficiently at low cooling fan speeds.Further information Further information on installation of exhaust air ducts can be found in chapter 13.3.5.3 Operating the machine in a compressed air networkIf the machine is supplying an air network, the network working pressure may not exceed 16 bar(China: 15.9 bar).When charging a fully vented air system there is generally a very high rate of airflow through the airtreatment devices. These conditions are detrimental to correct air treatment. Air quality suffers.To ensure the desired air quality when charging a vented air network, we recommend the installa‐tion of an air main charging system.➤ Consult KAESER for advice on this subject.5 Installation and Operating Conditions5.3 Operating the machine in a compressed air network9_5717 20 EService Manual Screw CompressorASK T SIGMA CONTROL BASIC 39
