Tank-mounted unit: Move the compressor by a lift truck by positioning the forks below the lifting supports
that are mounted between the feet of the air receiver. Make sure that the forks are positioned in the centre of
the air receiver and lift carefully.
5.3 Electrical connections
Important remark
To preserve the protection degree of the electric cubicle and to protect its components from dust
from the environment, it is mandatory to use a proper cable gland when connecting the supply
cable to the compressor.
Instructions
Also see section Electrical diagrams.
1. Provide an isolating switch.
2. Check that the motor cables and wires inside the electric cabinet are clamped tight to their terminals.
3. Check the fuses and the setting of the overload relay. See section Settings of overload relay and fuses.
4. Connect the power supply cables to their terminals L1, L2, L3.
5. Connect neutral conductor to connector (N).
6. Connect earth conductor bolt (PE).
On GA 15 up to GA 22 Full-Feature:
• The voltage supply to the dryer must be 230 V single-phase. The voltage to the dryer is supplied over the
contacts of relay (K11), which close when the compressor is started. For compressor supply voltages
different from 3 x 400 V plus neutral, 3 x 230 V, the power to the dryer is supplied by a transformer.
Compressor status indication on compressors equipped with an Elektronikon® controller
The Elektronikon controller is provided with an auxiliary relay (K05) for remote indication of a shutdown.
Contacts rating: max. 10 A / 250 V AC. Stop the compressor and switch off the voltage before connecting
external equipment. Consult Atlas Copco.
Compressor status indication on compressors equipped with an Elektronikon® Graphic controller
The Elektronikon regulator is provided with auxiliary contacts (K05, K07 and K08) for remote indication of:
• Manual load/unload or automatic operation (K07)
• Warning condition (K08)
• Shut-down condition (K05)
Contacts rating: max. 10 A / 250 V AC. Stop the compressor and switch off the voltage before connecting
external equipment. Consult Atlas Copco.
Compressor control modes
Stop the compressor and switch off the voltage before connecting external equipment. Only
voltage-free contacts are allowed.
Contact Atlas Copco.
Instruction book
2920 7083 31 119
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