•
Oil filter: An additional oil filter removes oil and oil-containing aerosols from the
compressed air.
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Compressed air lines: The nominal diameter of the compressed air lines at the
individual compressed air connections of the airWiper must be at least as large as
the nominal diameter of the corresponding channel. The nominal diameter of the
compressed air lines between the compressor and the valves must be sufficiently
dimensioned so that all connected channels can be adequately supplied with
compressed air. Otherwise the air flow will be limited and the cleaning effect
reduced.
Condensate
Ambient air is compressed in the compressor. The humidity in the air can condense in
the process. The condensate must be drained regularly.
Water condenses in the following cases, for example:
•
During gas compression: When air is compressed, its water absorption capacity
decreases and excess water condenses. Compressors therefore usually have a
condensate drain.
•
During gas cooling: When air cools, its water absorption capacity also decreases
and excess water condenses. If zones with different temperatures occur in the sys‐
tem, it must be ensured, especially at the transitions, that condensate is avoided
or discharged. When air is compressed, it becomes warm and usually cools down
again after the compressor. Water can therefore also condense in the compressed
air line behind the compressor. Possible countermeasures include a condensate
drain, or a line layout that ensures this condensate flows back to the compressor.
•
If the compressor draws in warm air, which then cools down in the system (e.g.,
when changing from indoors to outdoors or when air is drawn in from warm areas
of the vehicle), water can also condense in other parts of the system. To prevent
water from collecting in a compressed air line, the compressed air lines should
not contain any U-shaped segments. The compressed air lines should consistently
slope downwards toward either the compressed air tank or the airWiper so that
condensate drains either into the compressed air tank or to the airWiper.
Complementary information
If condensate has collected in the compressed air lines, for example after a long
downtime, system cleaning is recommended. Compressed air is passed through the
compressed air lines to remove condensate from the lines and from the airWiper.
Further topics
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10
ANNEX
36
O P E R A T I N G I N S T R U C T I O N S | airWiper
8027429/2022-05-20 | SICK
Subject to change without notice