Industrial Air Division
2920 5997 03
2
This instruction book describes how to handle the machines to ensure safe operation, optimum efficiency and long service life.
Read this book before putting the machine into operation to ensure correct handling, operation and proper maintenance from the
beginning. The maintenance schedule comprises measures for keeping the machine in good condition.
Keep the book available for the operator and make sure that the machine is operated and that maintenance is carried out according to the
instructions. Record all operating data, maintenance performed, etc. in an operator's logbook available from Atlas Copco. Follow all
relevant safety precautions, including those mentioned on the cover of this book.
Repairs must be carried out by trained personnel from Atlas Copco who can be contacted for any further information.
In all correspondence mention the type and the serial number, shown on the data plate.
For all data not mentioned in the text, see sections "Preventive maintenance schedule" and "Principal data".
The company reserves the right to make changes without prior notice.
Page
5 Servicing and adjustment procedures ........................... 10
5.1 Unloader or check valve ........................................... 10
5.2 Valves .................................................................... 10
5.3 Air filter ................................................................... 12
5.4 Setting of the air pressure switch ............................... 12
5.4.1 Air pressure switch MDR5 ............................. 12
5.4.2 Air pressure switch MDR4 ............................. 12
5.5 Safety valve ............................................................ 12
5.6 Relief valve (only LT) ............................................... 14
6 Problem solving ............................................................ 14
7 Principal data ................................................................ 15
8 Conversion list of SI units into British units .................. 17
9 Electrical diagrams ........................................................ 18
10 Dimension drawings ...................................................... 21
Contents
Page
1 Leading particulars .......................................................... 3
1.1 General description .................................................... 3
1.1.1 Compressor variants ....................................... 3
1.2 Air flow ..................................................................... 3
1.2.1 LE and LEN ................................................... 3
1.2.2 LT ................................................................. 3
1.3 Regulating system ..................................................... 3
1.3.1 LE/LT5 and -6 ................................................ 3
1.3.2 LE/LT7 up to -12 and LEN ............................... 3
2 Installation ...................................................................... 7
2.1 Electrical connections ................................................ 7
3 Operating instructions ..................................................... 8
3.1 Initial start-up ............................................................ 8
3.2 Starting ..................................................................... 8
3.3 Stopping ................................................................... 8
4 Maintenance .................................................................... 9
4.1 Preventive maintenance schedule ............................... 9
4.2 Lubrication (not for LEN) .......................................... 10
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