Atlas Copco GX 11, Инструкция, Страница: 47 / 76

Position of oil sight glass and filler plug on GX 7 and GX 11
Step Action
1 Before starting, the oil level sight-glass (SG) should be between 1/4 and 3/4 full.
2 Switch on the voltage.
3 Open air outlet valve (2).
4 Push the start button (1). The motor starts running after 25 seconds and automatic
operation led (3) alights.
On compressors with a star-delta starter, the drive motor switches over from star to delta
10 seconds after starting.
The maximum number of motor starts must be limited to 20 per hour.
It is strongly recommended to operate the compressor with a load factor of more than 10%
to avoid condensate in the oil.
5 Regularly check the oil level. 10 to 15 minutes after stopping, the sight-glass (SG) should
be between 1/4 and 3/4 full.
If the oil level is too low, stop the compressor, depressurise the oil system by unscrewing
oil filler plug (FC) one turn and wait a few minutes. Remove the plug and top up the oil,
until the sight-glass is 3/4 full. Do not overfill. Fit and tighten plug (FC).
6 When automatic operation LED (3) is lit, the regulator is automatically controlling the
compressor, i.e. loading, unloading, stopping of the motors and restarting.
7 Regularly check the working pressure (Gpa) and the dew-point gauge (Gdp) (FF units).
8 Regularly check that condensate is drained (Da) during running.
During normal operation, the oil level should be at approximately half of the sightglass. Under
certain conditions it is possible that only foam is visible. In that case, the oil level can only be
checked after stopping, following the described procedure.
Always stop the compressor as explained in
Stopping . Never use the emergency stop button
for normal stopping.
Instruction book
2920 7054 00 45