Commissioning; First Commissioning - Gardner Denver L Series Service Manual

8.1

First commissioning

DANGER
The rotational direction of the motor can
only be checked with the casing open.
Rotating parts may lead to injuries,
e.g., cutting of finger or hand.
 Before commissioning make sure that no
one is located in the danger zone of the
screw compressor!
 Be careful of rotating parts!
 Keep a sufficient distance from rotating
machine parts!
 Wear ear protectors
 Always operate system with the casing
closed except when performing this test.
CAUTION
When the compressor system is connected to a
power source for the first time, always check the
drive direction of the drive motor. The compressor
controller provides a jogging function under the
diagnostics menu. See the controller manual for
additional instruction. Incorrect rotation of the
compressor may cause serious damage, even
during short periods of operation.
The screw compressor unit is completely factory-
assembled. It can be directly connected to the
compressed air mains by means of a flexible
connection.
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 L55RS-L75RS) (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.

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 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.
13-25-638 v03 Page 34