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13. Compressed air processing option (After cooler / Filter)
13.1 Safety regulations for alternate
compressed air processing
Danger
When operating the compressor, please
observe the general safety regulations
laid forth in the compressor operating
manual.
13.2 Design and operation
System function diagram:
see page 78, fig. 4
After cooler option
Fig. 38
1 Filter
2 Heat exchanger
3 After cooler
4 Condensate separator
In an air cooler (on the cooling air intake
side), the compressed air is cooled down
to a temperature close to the prevailing
ambient air temperature downstream of the
pressure vessel. A condenser is installed
downstream of the air cooler with automatic
condensation drainage.
Attention
When there is a danger of freezing or
when the machine is switched off for a
prolonged period, any remaining
condensation must be drained from the
secondary cooler. For doing this the
bottom cover of the secondary cooler
must be opened and it must be emptied
utilising the pressure remaining in the
machine.
Filter option (ZTV-SIB 90)
A residual oil contents in the compressed
air of < 0.01 ppm is achieved by means of
filtering. The filter assembly consists of a
fine filter and an extra-fine filter. Both filters
are equipped with a collecting receiver with
automatic evacuation. The separated or
filtered liquids are brought together to a
common drain.
Attention
The oil-containing condensate has to be
collected. Do not allow to enter into the
soil or into the drains!
13.3 Maintenance instructions
Danger
Prior to and when carrying out
maintenance and repair procedures,
please do observe the general safety
regulations in chapter 3 of the
compressor operating manual.
Attention
The filters have to be disposed of.
The post cooling systems is mainte-
nance-free. For cleaning procedures,
see 9.1 „General maintenance“ in the
compressor operating manual.
Post option
Filter change is required at latest when
a differential pressure of 400 mbar has
been reached or after approximately
500 operating hours - depending on the
degree of contamination.
1
2
4
3
13.4 Troubleshooting
Problem
Increased air humidity of the compressed
air
Oil in discharge air line
Possible cause(s)
Contaminated air cooler.
Defective discharge valve in the collecting
receiver of the condensate separator.
See chapter 10 "Troubleshooting" in this
manual.
Defective discharge valve in the filter.
Faulty filter cartridges.
Correction
Clean
Replace
Replace
Replace
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