Instruction Book
9829 2115 69 90
5.4 Piping
Recommendations
When installing the piping, make sure that all pipes are clean.
Make sure that the dryer is protected against overpressure by safety valves
which are capable of blowing off the total volume flow of all connected
compressors. The safety valves must be installed as close as possible to the
dryer without any obstruction in between.
All connections to the dryer must be mounted stress-free. If necessary,
additional flexible connections must be foreseen.
To ensure correct operation of the dryer, it has to be fitted properly into the compressed air
system consisting of a compressor, the dryer and an application.
To prevent free water from entering the dryer, a water separator must always be installed in
case of Standard Pack units.
It is required to install pressure relief valves on each vessel of the dryer when there are ball
valves installed at the inlet and the outlet of the dryer to isolate the dryers from the air net.
Never overload the dryer as this 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
system). Consult Atlas Copco if in doubt.
Concerning the piping, following checks should be carried out:
• plugs and pipes must be removed before connecting the pipes
• make sure that all pipes, filters, valves, etc. are clean and are installed correctly with
or without bypass system
• make sure that no external force is exerted on the piping
• make sure that the piping is installed stress-free
5.5 Electrical Wiring
Description
The electrical wiring must comply with the local regulations. The air dryer must be earthed and
protected by fuses against short-circuiting.
• Before switching on the main power supply, check the voltage requirements
in the technical specifications or on the dryer data plate.
• Local regulations remain applicable if they are stricter than the values
proposed below
The voltage drop must not exceed 5 % of the nominal voltage. It may be necessary to use cables with a
larger size than those stated to comply with this requirement.
Electric cable size
Minimum 2X 0.75 mm
2
+ 0.75 mm
2
Maximum 2X1.5 mm
2
+ 1.5 mm
2
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