Draining the cooling liquid
l
Make sure that the vacuum pump has been switched off and that
it cannot be switched on again accidentally
l
Make sure that the vacuum pump has adjusted to atmospheric
pressure
l
Place a container under the drain plug (CLD) for the cooling liquid
l
Unscrew purge valve on cylinder upper plate
l
Unscrew drain plug on plate B-side
l
Unscrew drain plug of cooling liquid
l
Drain the cooling liquid
When cooling liquid stops running out:
l
Close the drain plug for the cooling liquid
l
Screw purge valve and drain plug
l
Switch on the vacuum pump and let it run for a few seconds
l
Make sure that the vacuum pump has been switched off and that
it cannot be switched on again accidentally
l
Unscrew again purge valve (CLV) on cylinder upper plate
l
Unscrew again purge valve (CLV) on plate B-side
l
Unscrew the drain plug for the cooling liquid again and drain the
remaining liquid
l
Make sure that the seal of the drain plug is not damaged and that
it sits properly. Replace it if necessary
l
Screw on the drain plug again
l
Screw purge valve and drain plug
l
Dispose of the used cooling liquid according to applicable environ-
mental protection regulations
Filling in new cooling liquid
l
Prepare the quantity of cooling liquid needed (see “Cooling liquid
type/quantity”)
NOTE
: The quantity of cooling liquid specified is of informative nature
only. Respect the procedure of filling the cooling liquid.
l
Make sure that the drain plug sits properly and does not leak
l
Unscrew purge valve on cylinder upper plate
l
Unscrew drain plug on plate B-side
l
Unscrew the filler cap for the cooling liquid
l
Fill in by filler hole until cooling liquid flows by drain plug of cylin-
der upper plate
l
Stop fill in
l
Close the drain plug
l
Fill in again by filler hole until cooling liquid flows by purge valve
of cylinder upper plate
l
Close the drain clock
l
Make sure that the seal of the filler cap are not damaged and that
they sit properly. Replace them if necessary
l
Screw on the filler cap again
l
Wipe cooling liquid that may have run on outside surfaces of va-
cuum pump
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
l
Dispose of the condensate according to applicable environmental
protection regulations
l
Check the sound absorber regularly and clean it if necessary
Checking the leak-protection
non-return valve (accessory)
l
Check the leak-protection non-return valve regularly and clean it if
necessary
CAUTION
Wear protective clothing when carrying out maintenance work on
the sound absorber and leak-protection non-return valve.
There could still be residues of contamination.
Overhaul
CAUTION
Inappropiate maintenance work on the vacuum pump can damage
the pump.
Danger of explosion!
If requirements are not met, the vacuum pump may not be switched
on!
Should work exceed the dismantling work described in this hand-
book, it may only be carried out by authorised persons.
DANGER
If the vacuum pump has pumped gases that were contaminated
with foreign bodies that are hazardous to health, the oil and
condensate are also contaminated with these foreign bodies.
These foreign bodies can penetrate into pores, openings and other
internal parts of the vacuum pump.
There is a health hazard when dismantling the vacuum pump.
There is also a danger to the environment.
Prior to shipping, the vacuum pump must imperatively be deconta-
minated and the degree of contamination must be documented in a
declaration of decontamination ("Declaration of Decontamination"),
which can be downloaded from www.buschvacuum.com.
DS 0600 E
Overhaul
0870772383 (En)
Page 17
Summary of Contents for COBRA DS 0600 E
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