Clean the leak-protection non-return valve
Check the ventilator filter (RF), clean if necessary
If the cooling water line is equipped with a filter:
Check the filter and clean or replace if necessary
Check the seals and replace if necessary
Check the intake and discharge lines and clean or replace if
necessary
Every 16 000 hours of operation, at the latest
after 4 years:
Drain the oil (see “Draining the oil”)
A main inspection of the vacuum pump (Busch)
Lock Out/ Tag Out procedure
Stop the pump with the LCD control (press on STOP button during
10s)
Press on emergency stop button
Switch off the main circuit breaker
Switch off the customer’s power supply
Switch off the water and nitrogen quick connections (inlet first,
then outlet)
Put the label or warning board “Maintenance processing” on or
next to the pump
Safety Lockout procedure
Take off the label or warning board “Maintenance processing”
Check the oil level according to the chapter “Checking the oil
level”
Switch on the main circuit breaker
Release the emergency stop button
Switch on the water and nitrogen quick connections (outlet first,
then inlet)
Make sure that the “Necessary installation instructions” are
followed
Start the pump with the LCD control (press on START button)
Checking the oil
Checking the oil level
Make sure that the vacuum pump has been switched off and that
it cannot be switched on again accidentally
Indication of the oil level on the various oil sight glasses
If the oil level does not reach the MIN marking:
Top up with oil (see “Refilling oil”) If t
he oil level exceeds the MAX marking:
Check the condensate drain
Drain the oil (see “Draining the oil”)
Refilling oil
NOTE
: Oil does not normally have to be refilled outside the
recommended oil change intervals. A drop in the oil level indicates a
fault (see "Alarms and warnings" -> Busch PLC and Busch LCD).
CAUTION
Only fill in oil through the oil filler opening.
CAUTION
Danger of burns when the oil filler cap is open.
Danger of injuries when the oil filler cap is not screwed on properly.
Only unscrew the oil filler cap when the vacuum pump has been
switched off.
The vacuum pump may only be switched on when the oil filler cap
is properly closed and tight.
We recommend submitting the pump to a leakage rate test in order
to ensure the pump is leak tight.
Make sure that the vacuum pump has been switched off and that
it cannot be switched on again accidentally
Unscrew the oil filler cap (OFP)
Fill in oil up to the middle of the oil sight glass
Make sure that the oil level lies between the MIN and MAX
markings on the oil sight glasses
Make sure that the seals of the filler cap are not damaged and that
they sit properly. Replace them if necessary
Screw on the filler cap again
Checking the colour of the oil
NOTE
: The oil must be clear and transparent. A permanent milky
colour is an indication for contamination by foreign bodies. A dark
colour is an indication for oil that has been chemically altered or
contaminated by foreign bodies.
WARNING
Dark colored oil may indicate a hazardous pump condition which
could cause personal injury.
If dark oil similar to the example shown is observed, you have to
contact the Busch Customer Service without delay.
Oil change
DANGER
If the vacuum pump has pumped gases that were contaminated
with foreign bodies that are hazardous to health, the oil is also
contaminatedwith these foreign bodies.
There is a health hazard when changing contaminated oil.
There is also a danger to the environment.
Wear protective clothing when replacing contaminatedoil.
Contaminated oil must be treated specially and must be disposed
of according to applicable regulations.
Maintenance
Page 16
BC 0601 G
0870235875
(En)
Summary of Contents for COBRA BC 0601 G
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