4.2 Function description ......................................................................................................... 26
4.3 Frequency converter ........................................................................................................ 27
4.4 Floating relay contacts ..................................................................................................... 27
4.5 Options ............................................................................................................................. 28
4.5.1 Water cooling ...................................................................................................... 28
4.5.2 Machine mountings ............................................................................................. 28
4.5.3 Cooling air filter mat ............................................................................................ 28
4.6 Operating modes .............................................................................................................. 29
4.6.1 Operating modes ................................................................................................ 29
4.7 Variable speed with frequency converter (SFC) .............................................................. 29
4.8 Safety Devices ................................................................................................................. 29
4.9 Operating panel SIGMA CONTROL 2 ............................................................................ 30
5 Installation and Operating Conditions
5.1 Ensuring safety ................................................................................................................ 33
5.2 Installation conditions ....................................................................................................... 33
5.2.1 Determining location and clearances .................................................................. 33
5.2.2 Ensuring the machine room ventilation ............................................................... 34
5.2.3 Exhaust duct design ........................................................................................... 35
5.3 Operating the machine in a compressed gas network ..................................................... 35
6 Installation
6.1 Ensuring safety ................................................................................................................ 37
6.2 Reporting Transport Damage ........................................................................................... 38
6.3 Checking the tightness ..................................................................................................... 38
6.4 Installing gas connections ................................................................................................ 38
6.4.1 Installing inlet and outlet gas connections .......................................................... 38
6.5 Connecting the power supply ........................................................................................... 39
6.6 Connecting the external pressure transducer .................................................................. 40
6.7 Options ............................................................................................................................. 40
6.7.1 Anchoring the machine ....................................................................................... 40
6.7.2 Connecting the cooling water ............................................................................. 41
7 Initial Start-up
7.1 Ensuring safety ................................................................................................................ 42
7.2 Instructions to be observed before commissioning or re-commissioning ......................... 43
7.3 Checking installation and operating conditions ................................................................ 43
7.4 Commissioning the Frequency Converter ....................................................................... 44
7.5 Filling with cooling oil ....................................................................................................... 44
7.6 Filling cooling oil into the airend ....................................................................................... 44
7.7 Setting the motor overload protection switch ................................................................... 46
7.8 Evacuating the machine ................................................................................................... 46
7.9 Starting the machine for the first time .............................................................................. 46
7.10 Checking the direction of rotation ..................................................................................... 47
7.11 Setting the display language ............................................................................................ 47
8 Operation
8.1 Switching on and off ......................................................................................................... 48
8.1.1 Switching on ....................................................................................................... 48
8.1.2 Switching off ....................................................................................................... 48
8.2 Switching off in an emergency and switching on again .................................................... 49
8.3 Switching on and off from a remote control centre ........................................................... 49
8.4 Switching on and off with the clock .................................................................................. 50
8.5 Interpreting operation messages ...................................................................................... 51
8.6 Acknowledging alarm and warning messages ................................................................. 51
Contents
ii
Service Manual Screw Compressor
ESD 442/14 bar (abs) SFC SIGMA CONTROL 2 ESD_2C_10357405_10–LIN_00 E