8 | Maintenance
26 | 44
Instruction Manual R5 RA 0165-0305 D_EN_en
●
Disconnect all connections.
DANGER
Maintenance work without disconnecting the variable speed drive.
Risk of electrical shock.
●
Disconnect and isolate the variable speed drive before attempting any work on it.
High voltages are present at the terminals and within the variable speed drive for up to 10
minutes after disconnection of the electrical supply.
●
Always ensure by using a suitable multimeter that no voltage is present on any drive power
terminals prior to commencing any work.
DANGER
Live wires. Carry out any work on the variable speed drive and motor.
Risk of electrical shock!
●
Electrical installation work must only be executed by qualified personnel.
8.1
Maintenance Schedule
The maintenance intervals depend very much on the individual operating conditions. The intervals
given below are considered as starting values which should be shortened or extended as
appropriate. Particularly harsh applications or heavy duty operation, such as high dust loads in the
environment or in the process gas, other contamination or ingress of process material, can make it
necessary to shorten the maintenance intervals significantly.
Maintenance work
Interval
Normal application
Harsh application
●
Check the oil level, see
27].
Daily
●
Check the vacuum pump for oil leaks - in case
of leaks have the machine repaired (contact
Busch).
In case of an inlet filter being installed:
●
Check the inlet filter cartridge, replace if
necessary.
Monthly
●
Change the oil*, the oil filter* (OF) and the
exhaust filters (EF).
Max. after 4000 hours,
at the latest after 1
year
Max. after 2000
hours, at the latest
after 6 months
●
Clean the vacuum pump from dust and dirt.
In case of a gas ballast valve (GB) being installed:
●
Clean the gas ballast valve.
If the vacuum pump is equipped with an air-oil
heat exchanger (AHE):
●
Check and/or clean the air-oil heat exchanger.
If the vacuum pump is equipped with a water
cooling system:
●
Check and/or clean the water cooling system.
Every 6 months
