BUSCH COBRA BC 0200 F, Installation And Maintenance Instructions Manual

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l Make sure that the seal of the filler cap is not damaged and that
they sit properly. Replace it if necessary
l Screw on the filler cap again
Checking the colour of the oil
NOTE : The oil must be clear and transparent. A permanent milky co-
lour 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
contaminated with 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 contaminated oil.
Contaminated oil must be treated specially and must be disposed
of according to applicable regulations.
Draining used oil
NOTE : After switching off the vacuum pump at normal operating tem-
perature wait no more than 20 minutes before the oil is drained.
l Make sure that the vacuum pump is switched off and cannot
accidentally be switched on again
l Make sure that the vacuum pump is vented to atmospheric
pressure
l Put a drain tray underneath the oil drain plug
l
Unscrew the oil drain plug
l Drain the oil
When the oil flow has stopped:
u Refit the oil drain plug
l Switch on the vacuum pump for a few seconds
l
Make sure that the vacuum pump is switched off and cannot
accidentally be switched on again
l
Remove the oil drain plug again and drain any remaining oil
l Carefully unscrew and remove the magnetic plug
l Check that no metal swarf sticks to the magnet of the magnetic
plug, clean if necessary
l Make sure that the sealing washer of the magnetic plug is not
damaged, replace it if necessary
l Refit the magnetic plug and tighten up
l Make sure that the sealing washer on the drain plug is undamaged
and correctly positioned, replace it if necessary
l Refit the oil drain plug and tighten up
Dispose of the used oil according to applicable regulations
CAUTION
Because of wear and tear of the seal, it is recommended to replace
the drain plug whenever the oil is changed.
Filling in new oil
l Prepare the quantity of oil needed (see “Oil type/ quantity”)
WARNING
The use of chemically contaminated or polluted oil can lead to ha-
zardous pump conditions which could cause personal injury.
NOTE : The quantity of oil specified in the installation handbook is of
informative nature only. Check the oil level with the help of the oil
sight glass on the vacuum pump.
l Make sure that the drain plug has been fitted properly and that
they do not leak
CAUTION
Only fill in oil through the oil filler opening.
l Unscrew the oil filler cap (OFP)
l Fill in oil up to the middle of the oil sight glass
l Make sure that the oil level lies between the MIN and MAX
markings on the oil sight glass
l Make sure that the seal of the filler cap is not damaged and that it
sit properly. Replace it if necessary
l Screw on the filler cap again
Checking the cooling water
Checking the cooling water flow
l Check the cooling water flow regularly
If the flow drops, check for leaks
u Make sure that the specifications of the cooling water are fol-
lowed
Checking the nitrogen
Checking the nitrogen flow
l Check the nitrogen flow regularly
If the flow drops, check for leaks
u Make sure that the specifications of the nitrogen are followed
Checking the current consumption
l Check the current intensity of the motor
An increased intensity is an indication for a fault (see “Troubleshoo-
ting”)
Checking the sound absorber
(accessory)
l Make sure that the condensate does not collect at the exhaust of
the vacuum pump
l Drain the condensate at the drain opening and collect it in a
container
BC 0200 F
Maintenance
0870767417 (En)
Page 17