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We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
106R Basic Systems User Guide
6190770 (Rev B)
g) Check the non-return valve
Turn off the compressor on the mains switch and pull out the
plug .
Empty the receiver for compressed air by operating the safety
valve . When the receiver is empty, the reading of the pressure
gauge is 0 bar .
Dismount the non-return valve from the receiver .
Disassemble the non-return valve and remove the O-ring (1)
from the piston .
Clean the non-return valve .
Mount a new O-ring and re-assemble the non-return valve .
Re-install the non-return valve .
Please note that all service must be carried out by a qualified
person .
Adjustment of pressure switch
The working presure has been preset from the factory, and it is
normally not necessary to change this .
However, if it is necessary to change the preset settings, the
instructions mentioned below should be followed carefully .
Warning
The compressor is constructed and approved for a max.
pressure as stated under Technical Specifications - do not
adjust to a higher pressure.
Higher working pressure will reduce the lifetime of the
compressor.
The compressor will stop at max . pressure (stop pressure) and
start again at min . pressure (start pressure) . The difference
between max . and min . pressure is the differens pressure .
Unscrew the lid of the pressure switch . Adjust max . pressure
adjusting the two springs marked A (clockwise: higher pressure) .
Adjust the two springs identically .
Adjust the differens pressure adjusting the spring marked B
(clockwise: higher differens pressure, start pressure maintained) .
Test of pumping time
The pumping time indicates the condition of the compressor .
1 . Check that there are no leaks in the system .
2 . Empty the air receiver of compressed air so that the
pressure gauge shows 0 bar .
3 . Close the filter regulator and check that the drain valve is
closed .
4 . Start the compressor and note the time it takes until it is
turned off again by the pressure switch . Check that the
pumping time agrees with the technical specifications for
the actual compressor system .
Please note that the pumping time in this manual is given for 0 to
max pressure .
Important
Always test the pumping time when cold. If the compressor is
warm, the pumping time will be considerably longer.
