Maintenance
9 --- 40
Oil mist can escape when the oil separator tank is vented.
When inserting the maintenance hose into the compressor’s hose
couplings, always have the ball valve closed and the hose end se-
cured before slowly opening the ball valve. Beware of air/oil mist that
could blow out of the hose. Unrestricted air/oil flow through the hose
end will result in a whipping action which could cause severe injury or
death.
Insert the maintenance hose (6) --- ball valve closed --- in the hose coupling (3) on the
oil separator tank (5).
Slowly open the ball valve (7). The residual pressure in the oil separator tank escapes.
Remove the maintenance hose (8) from the hose coupling (3) on the oil separator
tank.
Venting the air cooler:
After a compressor package is vented, there is still line pressure up to
the minimum pressure/check valve. For this reason, the compressor
package must be shutoff from the air main (downstream shutoff valve).
If no shutoff valve is installed, the complete air distribution network
must be vented.
With the ball valve (7) closed, insert the male coupling of a maintenance hose in the
connecting point of the minimum pressure/check valve, then slowly open the ball
valve to vent the air cooler.
Disconnect the maintenance hose from the hose from the minimum pressure/check
valve.
Close all maintenance doors and panels correctly before starting the
compressor package.
9.10 Oil Filter Change
Hot oil; beware of scalding.
Changing the oil filter element is recommended after the interval quoted in the regular
maintenance table (see chapter 9.3) or when the corresponding service message is dis-
played on SIGMA CONTROL (see chapter 8.1). The element must be changed after every
oil change.
9.10.1 Removal and replacement of the oil filter cartridge
Stop the compressor package under full load (see chapter 8.4).
Lock the main disconnect in the ”off” position in accordance with ap-
plicable lock out/tag out procedures (example: OSHA CFR 29
§ 1910.147) to ensure the compressor does not restart.
Before opening or removing pressurized components (pipes, hoses,
tanks, etc.) it is imperative that the compressor package is completely
depressurized.
Venting the compressor package (see chapter 9.9).
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