Wartung.pm6.5 - USA
Page 5.19
Maintenance
BOGE Operating instructions for S 40-2...S 341 / SF 40-2...SF 220 series screw compressors
Fig. 5.13: Cleaning the compressed air/oil cooling unit Note:
5.3 Regular maintenance work
Note: Demonstration example. Compressor may only be operated with the switch cabinet
closed and all panels fitted.
Check: – After approx. 3000 operating hours,
however, at least once a year.
1. Setting the operating pressure sensor
Switch-on pressure: P
min
= Final compression pressure – 14 psig.
Switch-off pressure: P
max
= Final compression pressure.
2. Setting the proportional controller
Displace the control range of the proportional controller by turning cap .
– Increase pressure level:
Turn cap clockwise.
– Reduce pressure level:
Turn cap counterclockwise.
Always set the proportional controller higher than the bottom operat-
ing pressure value (P
min
)!
3. Pressure switch for infinitely variable capacity control
The low pressure switch for the infinitely variable capacity control limits the
reduction of the delivered quantity and switches the compressor in the event
of less than 50 % delivered quantity into idling operation or off.
Proportional controller
(option for S-series)
1
1
2
For water-cooled versions
a cleaning is not necessary
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