Moving/lifting
Floor-mounted unit:
the compressor can be moved by a lift truck. Take care not to damage any installed
connections under the frame while moving the truck or compressor. For lifting make sure that the forks are
long enough to give a stable support for the compressor.
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.
9.3
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
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) if applicable.
6. Connect earth conductor bolt (PE).
On Full-Feature versions:
The supply voltage 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 and 3 x 230 V, the dryer is powered by a transformer.
Compressor control modes on compressors with Elektronikon® controller
Selection between local, remote and LAN control
if it is desired to switch to another
control mode.
The following control modes can be selected:
•
Local control:
The compressor will react to commands entered by means of the buttons on the
control panel. Compressor start/stop commands via Clock function are active, if programmed.
•
Remote control:
The compressor will react to commands from external switches. Emergency stop
remains active. Compressor start/stop commands via Clock function are still possible.
Options:
• Remote starting and stopping (switch S1')
• Remote loading/unloading (manual switch S4')
Contact Atlas Copco customer centre to activate it.
Have the modifications checked by Atlas Copco.
Stop the compressor and switch off the voltage before connecting external equipment.
Only potential free contacts are allowed.
•
LAN control:
The compressor is controlled via a local network. Consult Atlas Copco.
Instruction book
2920 7140 90
123
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