BUSCH COBRA DS 0160 G, Installation And Maintenance Instructions Manual

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Checking the cooling liquid
Checking the level of the cooling liquid
l Make sure that the vacuum pump has been switched off and that
it cannot be switched on again accidentally
l Check the level of the cooling liquid.
u Unscrew purge valve on cylinder upper plate.
Cooling liquid level should be just under the plate.
If the level is below:
u Top up with cooling liquid (see “Refilling cooling liquid”)
Refilling cooling liquid
NOTE : Cooling liquid does not normally have to be refilled outside the
recommended change intervals. A drop in the level of the liquid
indicates a fault (see “Troubleshooting”).
l Make sure that the vacuum pump has been switched off and that
it cannot be switched on again accidentally
l Unscrew the filler cap (CLF) for the cooling liquid
l Open purge valve (CLV)
l
Fill in by filler hole (CLF) until cooling liquid flows by drain plug of
cylinder upper plate
l Stop fill in
l Fill in again by filler hole until cooling liquid flows by purge valve
of cylinder upper plate
l Close the puge valve (CLV)
l Screw on the cooling liquid filler cap again
l If liquid has run on to the outside surfaces of the vacuum pump,
wipe it off
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 (CLV) on cylinder upper plate
l Unscrew drain plug (CLD) of cooling liquid
l Drain the cooling liquid
When cooling liquid stops running out:
l Close the drain plug (CLD) for the cooling liquid
l Screw purge valve (CLV) and drain plug (CLD)
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 the drain plug (CLD) 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 (CLD) again
l Screw purge valve (CLV) and drain plug (CLD)
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 Unscrew filler cap (CLF) of cooling liquid on the expansion vessel
l Open the purge valve (CLV)
l Fill in the cooling liquid through the filler opening until the liquid
starts running out the purge valve (CLV)
l Stop filling in cooling liquid
l Close the purge valve (CLV)
l
Fill in more cooling liquid through the filler opening until the level
of the liquid is 5 mm above the bottom of the expansion vessel
l Check the level of the cooling liquid with the measuring scale loca-
ted under the filler. The level of the liquid must not lie above the
bottom marking.
NOTE: You can also check the level of the liquid with the help of a
ruler
l
Screw on the filler cap for the cooling liquid again.
l If cooling liquid has run on the outside surfaces of the vacuum
pump, wipe it off.
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
“Troubleshooting”)
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
DS 0080-2000 G
Maintenance
0870772712 (En)
Page 21
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Cooling liquid
drain plug (CLD)
Cooling liquid filling plug (CLF) Cooling liquid purge plug (CLV)