9. Service and maintenance
39
9
Service and maintenance
9.1
Maintenance recommendations
Note
The screw compressor unit can only operate to your
complete satisfaction when the maintenance work is
carefully carried out at the specified intervals.
In order to facilitate this task, the scope of supply of the
screw compressor unit comprises the “Maintenance
and inspection manual for Gardner Denver
compressors”, in which you can list your performed
maintenance work at the specified intervals.
You can also have this maintenance work performed by
our trained technicians. Please ask your Gardner
Denver distributor for a maintenance contract.
9.2
Maintenance electric motor
The maintenance of the electric motor is to be
performed in line with the motor operating instructions.
9.3
Maintenance and inspection
schedule
Danger
When performing control, adjusting and mainte-
nance work, be careful with hot surfaces of
machine parts.
Checks and maintenance work may only be carried
out when the following points are observed:
Press the STOP button on the control panel and
wait until the screw compressor unit has come
to rest and the screw compressor unit is
depressurized
The pressure display does no longer indicate
pressures < 0.3 bar/4.4 PSI.
Shortly after switching the screw compressor
off, the system can contain a low residual
pressure.
The screw compressor unit must therefore be
depressorized prior to any maintenance work by
slowly opening the lock (oil filler cap) with
integral vents
The customer-installed main switch is set to "O"
(OFF) and locked off
Warning:
Electrical voltage: Only work on the screw
compressor unit when it is disconnected.
Only L07RS-L11RS:
Danger of electric shock from loaded
condensers!
Please always first disconnect the system from
the power supply and wait another 10 minutes
before touching the electrical components. The
power condensers require this time in order to
discharge!
Important
The maintenance intervals must be observed!
In the case of extreme operating conditions, it is
advisable to halve the service intervals.
Please contact authorized distributor of Gardner
Denver for instructions.
For order numbers see the spare parts list.
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