4.2 Functional Description of the Machine ............................................................................. 24
4.3 Refrigeration dryer ........................................................................................................... 26
4.4 Floating relay contacts ..................................................................................................... 26
4.5 Options ............................................................................................................................. 26
4.5.1 Machine mountings ............................................................................................. 26
4.5.2 Cooling air filter mat ............................................................................................ 27
4.5.3 Heat Recovery .................................................................................................... 27
4.5.4 Optional Filter Monitoring Set ............................................................................. 27
4.6 Operating States and Control Modes ............................................................................... 28
4.6.1 Operating states of the machine ......................................................................... 28
4.6.2 Control modes .................................................................................................... 28
4.7 Refrigeration Dryer Control Modes .................................................................................. 29
4.8 Safety Devices ................................................................................................................. 30
4.9 SIGMA CONTROL Keys and Indicators .......................................................................... 30
5 Installation and Operating Conditions
5.1 Safety ............................................................................................................................... 32
5.2 Installation Conditions ...................................................................................................... 32
5.2.1 Place of installation and distances ...................................................................... 32
5.2.2 Ensure adequate ventilation ............................................................................... 33
5.2.3 Exhaust duct design ........................................................................................... 33
5.3 Using the Compressor to Supply A Compressed Air System. ......................................... 34
6 Installation
6.1 Safety ............................................................................................................................... 35
6.2 Reporting Transport Damage ........................................................................................... 35
6.3 Making the Compressed Air Connection .......................................................................... 35
6.4 Connecting the condensate drain .................................................................................... 36
6.5 Making the Power Supply Connection ............................................................................. 37
6.5.1 Changing main voltage connections ................................................................... 37
6.6 Refrigeration dryer: Connecting the transformer according to the power supply. ............ 39
6.7 Options ............................................................................................................................. 39
6.7.1 Anchoring the machine ....................................................................................... 39
7 Initial Start-up
7.1 Safety ............................................................................................................................... 40
7.2 To be noted before commissioning .................................................................................. 40
7.3 Checking Installation and Operating Conditions .............................................................. 41
7.4 Setting the Overload Protection Cut-Out .......................................................................... 42
7.5 Setting the Motor Overload Protection Switch ................................................................. 42
7.6 Pouring Cooling Oil into the Airend .................................................................................. 42
7.7 Check Direction of Rotation ............................................................................................. 43
7.8 Starting the machine for the first time .............................................................................. 43
7.9 Setting the Setpoint Pressure .......................................................................................... 44
7.10 Changing the display language ........................................................................................ 44
8 Operation
8.1 Switching On and Off ....................................................................................................... 46
8.1.1 Switching on ....................................................................................................... 46
8.1.2 Shutdown ............................................................................................................ 46
8.2 Switching Off in an Emergency and Switching On again ................................................. 47
8.3 Remote On and Off Switching .......................................................................................... 47
8.4 Switching On and Off with the Clock ................................................................................ 48
8.5 Acknowledging Alarm and Warning Messages ................................................................ 49
9 Fault Recognition and Rectification
9.1 Basic Information ............................................................................................................. 51
Contents
ii
Service Manual Screw Compressor
ASD T Tri-Voltage 9_5721 06 USE
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