4.2 Machine function .............................................................................................................. 27
4.3 Refrigerated dryer ............................................................................................................ 28
4.4 Air receiver ....................................................................................................................... 28
4.5 Safety devices .................................................................................................................. 28
4.6 Floating relay contacts ..................................................................................................... 29
4.7 Operating panel SIGMA CONTROL BASIC .................................................................... 29
4.8 Functional description – SIGMA CONTROL BASIC ....................................................... 30
4.8.1 Display layout ..................................................................................................... 30
4.8.2 Parameter ........................................................................................................... 31
4.8.3 Messages ........................................................................................................... 32
4.9 Operating modes and control modes ............................................................................... 33
4.9.1 Machine operating modes .................................................................................. 33
4.9.2 START-STOP control ......................................................................................... 33
4.10 Refrigerated dryer control modes ..................................................................................... 33
4.11 Options ............................................................................................................................. 33
4.11.1 Machine mountings ............................................................................................. 34
5 Installation and Operating Conditions
5.1 Ensuring safety ................................................................................................................ 35
5.2 Installation conditions ....................................................................................................... 35
5.2.1 Determining location and clearances .................................................................. 35
5.2.2 Ensuring the machine room ventilation ............................................................... 36
5.3 Operating the machine in a compressed air system ........................................................ 37
6 Installation
6.1 Ensuring safety ................................................................................................................ 38
6.2 Reporting Transport Damage ........................................................................................... 39
6.3 Connecting the machine with the compressed air network .............................................. 39
6.4 Connecting the condensate drain .................................................................................... 39
6.5 Refrigerated dryer: Connecting the transformer according to the power supply. ............. 41
6.6 Making the Power Supply Connection ............................................................................. 41
6.6.1 Changing main voltage connections ................................................................... 42
6.7 Options ............................................................................................................................. 43
6.7.1 Anchoring the machine ....................................................................................... 43
7 Initial Start-up
7.1 Ensuring safety ................................................................................................................ 44
7.2 Instructions to be observed before commissioning or re-commissioning ......................... 45
7.3 Checking installation and operating conditions ................................................................ 45
7.4 Setting the overload protection relay ................................................................................ 46
7.5 Pouring cooling oil into the airend .................................................................................... 46
7.6 Starting the machine for the first time .............................................................................. 47
7.7 Setting the network setpoint pressure .............................................................................. 47
8 Operation
8.1 Switching On and Off ....................................................................................................... 49
8.1.1 Switching on ....................................................................................................... 49
8.1.2 Switching off ....................................................................................................... 49
8.2 Switching off in an emergency and switching on again .................................................... 50
8.3 Setting parameters ........................................................................................................... 50
8.4 Acknowledging alarm and warning messages ................................................................. 51
9 Fault Recognition and Rectification
9.1 Basic instructions ............................................................................................................. 53
9.2 Fault messages (machine shut down) ............................................................................. 53
9.3 Warning messages .......................................................................................................... 54
9.4 Other faults ....................................................................................................................... 55
Contents
ii
Operator Manual Screw Compressor
AIRTOWER 3C–7.5C Tri-Voltage 9_6917 34 USE
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