Maintenance
6.4
Maintenance work at fixed service intervals
Page 70
Operating instructions for S 40-3...S 150-3 series screw compressors
Every 9,000 operating
hours / every 2 years:
Oil change
Change
the oil:
– In the case of Syprem S:
After 9,000 operating hours, but after two years at the latest.
Oil change (see also Figs. 6.9 to 6.11):
Before changing the oil, an air cushion must be built up. The combined com-
pressed air/oil receiver is located at the lowest point of the system. Therefore,
a light air cushion (approx. 22 psig system pressure) must be applied to drain
the oil. This pressure forces the oil through the drain hose into a suitable col-
lecting vessel. To build up an air cushion:
1. Switch the compressor off with the OFF button.
2. Remove the cover on the maintenance side.
3. Place the end of the oil drain hose into a suitable collecting vessel (6).
4. Remove the cap nut (5) from the switch cabinet.
5. Close off the vent hole of the solenoid valve with the cap nut.
6. During the output phase, press the OFF button on the compressor, and
after approx, 3 seconds, or after a residual pressure of 29 psig, shut down
the compressor with the emergency stop button.
WARNING!
If you use a different oil instead of Syprem S:
it is essential that you contact the BOGE service department to determine the
required oil change intervals.
NOTICE!
The service life of the oil, the oil filter and oil separators is reduced under the
following conditions:
– When the compressor is operated at extreme ambient temperatures.
– When the intake air is extremely contaminated.
WARNING!
Never use any tools to screw on the cap nut!
They might damage the solenoid valve.
WARNING: Risk of injury!
Danger of burning due to hot oil!
Always wear protective gloves when working on the compressor!
WARNING: Risk of injury!
Press the emergency stop button, use the mains disconnection device to iso-
late the compressor from the power supply and fix a padlock to prevent the
power from being switched on again unintentionally.