3
Compressed air prefilter for general purpose filtration, particle removal down to 1
micron, maximum oil carry-over 0.5 ppm
This filter provides extra protection of the dryer and extends the lifetime of the high
efficiency filter cartridge (4).
4
High efficiency filter, particle removal down to 0.01 micron, maximum oil carry-over
0.01 ppm
To remove remaining impurities.
5
Dust filter, particle removal down to 1 micron
To remove dust particles originating from the desiccant.
6
Water separator (optional)
To prevent free water from entering the dryer.
General recommendations
Keep the following in mind when installing the dryer:
• Place the dryer at a location where the temperature never exceeds the limits; see
.
• The dryer does not require extra ventilation.
• Fix the dryer as level as possible to the floor. Make sure the fixating bolts are tightened firmly and
that the floor is suitable for taking the weight of the dryer.
• Provide enough space around the unit to install and service the filter elements. A minimum free space
of 800 to 1000 mm (approx. 2.6 to 3.2 ft) is recommended - see the installation proposal drawings.
Provide sufficient space under the filter elements to be able to replace the filter cartridges without
having to disassemble the piping.
• Always install a high efficiency filter (4) at the inlet of the dryer. A prefilter (3) is recommended to
extend the lifetime of the high efficiency filter. The drain pipes (1) of the water separator and the
filters must not dip into the water. Use a dust filter (5) at the outlet of the dryer. Should oil vapor and
odors be undesirable, a carbon filter can be installed downstream the dust filter.
• If the compressor has no built-in water separator, a water separator (WSD) has to be installed before
the dryer in order to prevent free water from entering the dryer, as free water can damage the
desiccant. If the condensate contains oil, install an oil/water separator for draining of pure condensate
water.
• It is recommended to install bypass pipes with ball valves over the filters in order to isolate the filters
during service operations without disturbing the compressed air delivery.
• It is required to install pressure relief valves on each vessel of the dryer when ball valves are installed
at the inlet and the outlet of the dryer to isolate the dryer from the air net.
Never overload the dryer as a too high air speed will damage the desiccant. It may be
recommended to install the air dryer upstream of the air receiver to prevent overload (e.g.
after extending the dry air circuit). Consult your supplier if in doubt. See also section
for the correct operation procedure.
5.3
Electrical connections
The electrical wiring must comply with the local regulations. The air dryer must be earthed
and protected by fuses against short-circuiting.
Instruction book
2920 1891 00
49
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