4.4 Floating relay contacts ..................................................................................................... 29
4.5 Options ............................................................................................................................. 29
4.5.1 Machine mountings ............................................................................................. 29
4.5.2 Prepared for external heat recovery ................................................................... 30
4.6 Operating modes and control modes ............................................................................... 30
4.6.1 Operating modes ................................................................................................ 30
4.6.2 Control modes .................................................................................................... 31
4.7 Refrigeration Dryer Control Modes .................................................................................. 32
4.8 Safety devices .................................................................................................................. 33
4.9 Keys and LEDs – SIGMA CONTROL BASIC .................................................................. 33
4.10 Functional description – SIGMA CONTROL BASIC ....................................................... 34
4.10.1 Display layout ..................................................................................................... 34
4.10.2 Parameters ......................................................................................................... 35
4.10.3 Messages ........................................................................................................... 36
5 Installation and Operating Conditions
5.1 Ensuring safety ................................................................................................................ 37
5.2 Installation conditions ....................................................................................................... 37
5.2.1 Determining location and clearances .................................................................. 37
5.2.2 Ensuring the machine room ventilation ............................................................... 38
5.2.3 Exhaust duct design ........................................................................................... 39
5.3 Operating the machine in a compressed air network ....................................................... 39
6 Installation
6.1 Ensuring safety ................................................................................................................ 40
6.2 Reporting Transport Damage ........................................................................................... 41
6.3 Connecting the machine with the compressed air network .............................................. 41
6.4 Connecting the power supply ........................................................................................... 41
6.4.1 Refrigeration dryer: Connecting the transformer according to the mains
supply. ................................................................................................................
42
6.5 Connecting the Condensate Drain ................................................................................... 42
6.6 Connecting the remote LOAD-IDLE control ..................................................................... 43
6.7 Options ............................................................................................................................. 44
6.7.1 Anchoring the machine ....................................................................................... 44
6.7.2 Connecting the external heat recovery system ................................................... 44
7 Initial Start-up
7.1 Ensuring safety ................................................................................................................ 45
7.2 Instructions to be observed before commissioning or re-commissioning ......................... 46
7.3 Checking installation and operating conditions ................................................................ 46
7.4 Setting the overload protection cut-out ............................................................................ 47
7.5 Pouring cooling oil into the airend .................................................................................... 47
7.6 Activating and deactivating the MODULATING control .................................................... 48
7.7 Checking the Door Interlock Switch ................................................................................. 49
7.8 Starting the machine for the first time .............................................................................. 50
7.9 Setting the setpoint pressure ........................................................................................... 50
8 Operation
8.1 Switching On and Off ....................................................................................................... 52
8.1.1 Switching on ....................................................................................................... 52
8.1.2 Switching off ....................................................................................................... 52
8.2 Switching off in an emergency and switching on again .................................................... 53
8.3 Setting parameters ........................................................................................................... 54
8.4 Acknowledging alarm and warning messages ................................................................. 55
9 Fault Recognition and Rectification
9.1 Basic instructions ............................................................................................................. 56
Contents
ii
Service Manual Screw Compressor
ASK T SIGMA CONTROL BASIC 9_5717 20 E