35
Maintenance of the air filter
The air filter must be cleaned intermediately or be re-
placed by a new one (refer to the instructions on inter-
mediate cleaning).
Intermediate cleaning of the air filter
Note
Intermediate cleaning can be done no more than five
times.
The air filter must be replaced when damaged, after
five intermediate cleaning procedures or after two
years at the latest.
Clean the filter carefully in order to avoid damage to
the filter material and ensure that no dust enters the
clean air side of the filter.
Intermediate cleaning is to be carried out as follows :
• Pull both spring latches at the lower part of the hou-
sing outwards and remove the lower part
• Remove the cover from the dust collector (lower part
of the housing) and empty it.
• The collector must not be more than half full - if re-
quired, shorten the maintenance intervals.
• Carry out an intermediate cleaning of the air filter
cartridge (observe the note on "intermediate cle-
aning") or replace it by a new one.
• Carefully slide the air filter cartridge into the housing.
When closing the housing, the air filter cartridge is
automatically placed in the correct position.
• Fit the cover into the dust collector (lower part of the
housing).
Attention: Take note of the marking for the correct
position.
• Close the air filter with the lower part of the housing.
The spring latches must snap into place.
Changing intervals of oil fine separators
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 SO
2
, solvent vapours, etc.) have a strong influ-
ence on the oil change intervals. For such applications,
the required changing intervals could be shorter.
8.7
Air filter change/check
Fig. 24
Danger
.
Only perform checks and carry out work on the
screw compressor when the unit is out of operation
and depressurized !
Important
Never operate the screw compressor unit without
air filter (even a short operating time without this fil-
ter can result in considerable damage to the machi-
ne) !
A clogged air filter must be cleaned or replaced when
the maintenance point has been reached.
If the air filter cartridge is monitored (option), a high
differential pressure is indicated on the operating pa-
nel. When the corresponding LED lights up, the air filter
cartridge is to be replaced.
Check the air filter for accumulated dust at least once
a week or, if required, daily.
During maintenance work, take care that no dirt en-
ters the clean air side of the air filter.
pull
push
8. Servicing and maintenance
