2. On water-cooled compressors, close the cooling water drain valves.
Open the cooling water inlet valve and the regulation valve.
3. Switch on the voltage. Start the compressor and stop it immediately. Check the rotation direction of drive
motor (M1) while the motor is coasting to a stop. The correct rotation direction of the drive motor is
indicated by an arrow shown on the motor fan cowl.
If the rotation direction of the drive motor is incorrect, open the isolating switch and reverse two incoming
electric lines.
Incorrect rotation direction of the drive motor may cause damage to the compressor.
4. On air-cooled compressors, check also the rotation direction of the fan motor. Rotation arrows, visible
through the grating in the roof, are provided on the plate below the fan to indicate the correct rotation
direction of the fan motor.
If the rotation direction of the fan motor is incorrect, open the isolating switch and reverse two incoming
electric connections at the terminals of circuit breaker (Q15).
5. Check the programmed settings. For compressors equipped with an Elektronikon® controller, consult
section Programmable settings.
Check the programmed settings. For compressors equipped with an Elektronikon® Graphic controller,
consult section Programmable settings.
6. Start and run the compressor for a few minutes. Check that the compressor operates normally.
8.2 Before starting
Procedure
1. If the compressor has not run for the past 6 months, it is strongly recommended to improve the lubrication
of the compressor element before starting. See section Initial start.
2. Check oil level. Top up if necessary.
Instruction book
2920 7109 60 163
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