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8. Commissioning
Fig. 14
1 Drive motorʻs direction of rotation
NOTE
In general, use the Stop button
the compressor (Fig. 15), and not the large
EMERGENCY STOP button. After switching off
the screw compressor unit, it will continue to
run for 30 -50 seconds (SOFT STOP).
Temperature start-up protection
The screw compressor unit will not start up if the
ambient temperature is lower than 33.8 °F.
8.2
Routine commissioning
Warning
Rotating parts inside the unit 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
motor/screw compressor!
• After doing work: Check that all safety
equipment is reinstalled and that all
tools have been taken out!
• Only operate the screw compressor with
the coverings closed!
to shut off
For routine commissioning, proceed as follows:
Check oil level in the pressure reservoir (see also
•
Section 7.5).
Open shut-off valves between the screw
•
compressor, reservoir and pipe.
Switch on the power supply master switch.
•
Once the power supply has been switched on, the
•
POWER LOSS fault appears. This fault must be
acknowledged using the
Press START button I (Fig. 15).
•
To switch off the compressor in the usual way use
•
the STOP button
emergency STOP button. After shutdown the
compressor has a run on time of 30 seconds (soft-
stop).
Start-up protection of the electric motor
The screw compressor unit will not start up if the final
compression pressure is more than 11, 6 PSI.
Temperature start-up protection
The screw compressor unit will not start up if the ambi-
ent temperature is lower than 33.8 °F.
8.3
Commissioning after malfunction
NOTE
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:
Turn master switch off.
•
Eliminate fault.
•
Turn master switch on.
•
Press acknowledgement push-button
•
Start the screw compressor unit by pressing the
•
START button
(Fig. 15).
I
key (Fig. 15).
(Fig. 15) and not the
(Fig. 15)
31
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