Table Of Contents - Atlas Copco GA55 Instruction Book

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 always 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.
Contents
1 Leading particulars . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 General description . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1.1 Air flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1.2 Oil system . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1.3 Cooling and condensate drain systems . . . . 7
1.2 Unloading/loading system . . . . . . . . . . . . . . . . . . . 7
1.2.1 Unloading . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2.2 Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Elektronikon regulator . . . . . . . . . . . . . . . . . . . . . . 7
1.3.1 Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3.2 Control panel . . . . . . . . . . . . . . . . . . . . . . . 11
1.3.3 Function keys . . . . . . . . . . . . . . . . . . . . . . . 12
1.3.4 Menu-driven control programs . . . . . . . . . 13
1.4 Air dryer on GA Full-feature . . . . . . . . . . . . . . . . 14
1.4.1 Compressed air circuit . . . . . . . . . . . . . . . . 14
1.4.2 Refrigerant circuit . . . . . . . . . . . . . . . . . . . 14
2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.1 Dimension drawings . . . . . . . . . . . . . . . . . . . . . . . 15
2.2 Installation proposal . . . . . . . . . . . . . . . . . . . . . . . 16
2.3 Electric cable size . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.3.1 For GA55/GA55 W . . . . . . . . . . . . . . . . . . 18
2.3.2 For GA75/GA75 W . . . . . . . . . . . . . . . . . . 18
2.3.3 For GA90C/GA90C W . . . . . . . . . . . . . . . 18
2.4 Electrical connections . . . . . . . . . . . . . . . . . . . . . . 19
2.5 Pictographs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.6 Cooling water requirements . . . . . . . . . . . . . . . . . 20
3 Operating instructions . . . . . . . . . . . . . . . . . . . . . . . . 20
3.1 Initial start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.1.1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.1.2 User Manual . . . . . . . . . . . . . . . . . . . . . . . 20
3.1.3 Outdoor/altitude operation . . . . . . . . . . . . 20
3.1.4 Moving/lifting . . . . . . . . . . . . . . . . . . . . . . 21
3.1.5 External compressor status indication . . . . 21
3.1.6 Compressor control modes . . . . . . . . . . . . 21
3.2 Before starting . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.3 Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.4 During operation . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.4.1 Checking the display . . . . . . . . . . . . . . . . . 24
3.5 Manual control . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
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3.6 Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.7 Taking out of operation at end of compressor
service life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.1 Drive motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.2 Preventive maintenance schedule for the
compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.3 Oil specifications . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.3.1 Atlas Copco Roto-injectfluid . . . . . . . . . . 28
4.3.2 Mineral oil . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.4 Oil and oil filter change . . . . . . . . . . . . . . . . . . . . 28
4.5 Storage after installation . . . . . . . . . . . . . . . . . . . . 28
4.6 Service kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5 Adjustments and servicing procedures. . . . . . . . . . . 30
5.1 Air filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.2 Coolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.3 Safety valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6 Problem solving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7 Principal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.1 Readings on display . . . . . . . . . . . . . . . . . . . . . . . 31
7.2 Settings of safety valve . . . . . . . . . . . . . . . . . . . . . 31
7.3 Maximum settings of overload relay,
circuit breaker and fuses . . . . . . . . . . . . . . . . . . . . 32
7.3.1 For GA55/GA55 W . . . . . . . . . . . . . . . . . . 32
7.3.2 For GA75/GA75 W . . . . . . . . . . . . . . . . . . 32
7.3.3 For GA90C/GA90C W . . . . . . . . . . . . . . . 32
7.4 Settings of dryer switches . . . . . . . . . . . . . . . . . . . 33
7.5 Compressor specifications . . . . . . . . . . . . . . . . . . 33
7.5.1 Reference conditions . . . . . . . . . . . . . . . . . 33
7.5.2 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.5.3 GA55/GA55 W Pack . . . . . . . . . . . . . . . . . 34
7.5.4 GA55/GA55 W Full-feature . . . . . . . . . . . 34
7.5.5 GA75/GA75 W Pack . . . . . . . . . . . . . . . . . 35
7.5.6 GA75/GA75 W Full-feature . . . . . . . . . . . 35
7.5.7 GA90C/GA90C W Pack . . . . . . . . . . . . . . 36
7.5.8 GA90C/GA90C W Full-feature . . . . . . . . 36
7.6 Conversion list of SI units into US/British units . 36
Instruction book
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