Operating and Maintenance Manual 09/2019 – part I
Screw compressors
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5
6
6. Start-up
6.1. Start-up preparation
Each compressor unit is tested in the factory and carefully inspected to ensure proper
machine performance and meeting the specifications declared.
Strictly obey the following rules before starting the machine for the first time:
- Get thoroughly familiar with the compressor Operating and Maintenance Manual and the
Warranty Book.
- Check the power cables for possible damage, short-circuits and electrical breakdowns.
Only authorised / qualified electrician can perform work on electrical equipment and
components.
- Make sure the power supply voltage is correct and the required protections are in place;
do not connect the compressor to a power source of different voltage than that specified in
the Operating and Maintenance Manual.
- Connect the phase wires correctly so that the rotation direction is as indicated on the screw
block, motor, belt transmission guard or coupling guard.
Checking - in the electrical box on relay K1 (photo below) the upper diode should be green
(confirmation of 3 phases), the lower diode should be yellow / orange (confirmation of
correct phase connection in accordance with the correct direction of rotors rotation, marked
on the screw block, belt transmission cover or clutch cover).
- Check the oil level in the screw block or in the oil tank and top it up, if necessary.
- Check the tension of V-belts or inspect the elastic coupling condition.
green diode
yellow/orange diode
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