Operating and Maintenance Manual 09/2019 – part I
Screw compressors
28
of operation or after
4 years from the
purchase date
(if the compressor
has not operated
12000 hours during 4
years)
Carry out the same operations as in the inspection
every 6000 hours and additionally the following:
- Replace
• contactors in electric installation.
of operation or after
5 years from the
purchase date
(if the compressor
has not operated
15000 hours during 5
years)
Carry out the same operations as in the inspection
every 3000 hours
Every next 3000
hours of operation
Carry out the same operations as in the inspection
every 3000 hours
Every next 6000
hours of operation
Carry out the same operations as in the inspection
every 6000 hours
After 24000 hours
of operation
Carry out the same operations as in the inspection
every 12000 hours and additionally the following:
- Replace
• bearings in screw air end.
* in screw compressors with motor power from 75 kW
During the warranty period, the inspections must only be performed by the
manufacturer service or authorised service centre listed in the Warranty
Book.
If the machine is operated in severe conditions, the maintenance work must be carried out
more often.
The severe conditions include:
- Too low / high temperature in a room,
- Dusty environment,
- Frequent switching of the machine between idle and loaded running.
8.2.5 General remarks
- In case of short compressing cycles and long intervals between switching (the compressor
does not reach the operating temperature between 70°C and 90 °C), there is a risk of
condensate (water) accumulation inside the screw block or oil tank. The condensate should
be regularly drained, every 100 hours of operation or once a week.
- Failure to perform and document the inspections will void the warranty.
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