7. Commissioning
35
7.4
Routine commissioning
Danger
Make sure before commissioning that nobody is in
the danger zone of the motor/screw compressor.
After completion of maintenance work: Verify that
all safety devices have been refitted and that all
tools have been removed.
Only operate the screw compressor unit with
closed access panels.
For routine commissioning, proceed as follows:
•
Open shut-off valves between the screw
compressor, reservoir and pipe.
•
Ensure cooling water supply (only water-cooled
units).
•
Switch on the power supply master switch.
•
After the power supply was switched on, all LEDs
on the compressor control DELCOS XL light up for a
display test. The fault shown on the display [power
supply fault] must be acknowledged in the fault
memory menu item prior to starting the unit. (The
display language can be set in the start screen
using the "globe icon".)
•
After the acknowledgement, the message [READY
TO START] appears on the display, unless another
fault is present.
•
Press START button [ I ] (- 2 - Fig. 18).
•
To switch off the compressor in the usual way use
the STOP button (-3- Fig. 18) and not the
emergency STOP button (-7- Fig. 18). After
shutdown the compressor has a run on time of
30 - 50 seconds (soft-stop). The time remaining is
counted down on the display.
Start-up protection of the electric motor
The screw compressor unit will not start up if the final
compression pressure is more than 1.0 bar (14.5 PSI).
Temperature start-up protection
The screw compressor unit will not start up if the ambi-
ent temperature is lower than + 2 °C (35.6 °F).
7.5
Commissioning after malfunction
Important
Do not switch the screw compressor on repeatedly
without having rectified the malfunction, since this
may cause considerable damage to the machine.
Re-start after an automatic shutdown due to a
malfunction as follows:
•
Faults are shown as text in the compressor control
DELCOS XL "fault memory" display menu.
•
Turn master switch off and secure it from being
switched on again.
•
Eliminate fault.
•
Turn master switch on.
•
Acknowledge the fault in the fault memory menu.
After the acknowledgement, the message [READY
TO START] appears on the display, unless another
fault is present.
•
Press START button [ I ] (-2- Fig. 18).
7.6
Shutoff
To switch off the compressor use the O key (-3- Fig. 18)
and not the EMERGENCY STOP button. After shutdown
the compressor has a run on time of 30-50 seconds (soft-
stop).
Note
The unit may only be shut down using the emergency
off button in real emergencies. When shutting down
normally, please use the
O
key.
7.7
Emergency stop
The EMERGENCY STOP button is situated next to the
DELCOS XL. It is used to immediately shut down the
unit. Only use the EMERGENCY STOP button (-7- Fig.
18) to shut down the unit in emergencies. When
shutting down normally, always use the [O] key.
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