Gardner Denver L Series Original User And Service Manual page 35

First commissioning is carried out as follows:

Remove transport guards, if fitted.

Check the oil level in the pressure reservoir (also see Section 7.5 Fig. 13)

Check settings of the fan motor protection switch (only L90RS-L132RS) (see Section 7.4.1)

Check and re-tighten all connecting terminals of the electrical control.

Open isolator valves between the screw compressor, reservoir and pipe.

Ensure cooling water supply in accordance with Section 7.3. (only water-cooled units).

Turn on the main power supply switch.

After the power supply was switched on, the compressor controller will boot to the home screen. The fault shown on
the display [power supply fault] must be acknowledged in the alarm screen prior to starting the unit.

After the acknowledgement, the message [READY TO START] appears on the display, unless another fault is
present.

The factory settings of the Load, Target and Unload set points are saved in the compressor controller and depend
on the pressure variant of the compressor (see nameplate fig. 1, stage pressures = maximum operating pressure).
These settings can be checked or changed in the Settings -> Control menu (further information can be found in the
compressor controller operating manual).

Temporarily remove the panel in order to check the direction of rotation. See (-1- Fig. 14) for the prescribed direction
of rotation of the drive motor of the geared compressor. See (-1 Fig. 14 a) for the prescribed direction of rotation of
the drive motor with direct drive. For the prescribed direction of rotation of the fan, see direction of rotation arrow on
the fan (-3- Fig. 14 b and c).

Use the jog motor function in the diagnostics menu to jog and check direction of rotation of the main and fan motor.

With a wrong direction of rotation, de-energize/lock out and correct the direction of rotation.
Fig. 14
1 Drive motor direction of geared compressors
13-25-639 v00 Page 34