9. Service and maintenance
44
9.7.2 Changing of air intake filter L15-L22
Fig. 21 L15-L22
1 Air filter housing cover
2 Air filter housing
3 Air filter element
4 Fixing clip
Change the air filter as follows:
• Loosen and remove the air filter housing cover
( - 1 - Fig. 21)
• Remove the air filter ( - 3 - Fig. 21) and replace it
with a new one
• Insert the air filter cartridge into the air filter housing
(- 2 - Fig. 21)
• Screw the air filter housing cover on to the air filter
housing
Changing intervals for air filter cartridge
The operating conditions (e.g. coolant temperatures),
the operating modes and the quality of the intake air
(e.g. content of dust, content of gaseous foreign matter
such as SO2, solvent vapours, etc.) have a strong
influence on the service life of the filters (air filters, oil
filters, fine separators).
Where such conditions exist the filter element may
require changing more frequently.
9.8 Safety valve
Fig. 22
1 Safety valve
Testing the safety valve
The valve should be tested on a separate compressed
air line in accordance with local legislation.
Operate the safety valve depending on the type of
valve:
• by unscrewing the cap one or two turns and
retightening it
• or by pulling the valve lifting lever
Danger
Never operate a screw compressor system with a
defective safety valve or without safety valve!
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