If the vacuum pump is equipped with a system shut-off valve at the
inlet:
u
Close the system shut-off valve
u
Apply inlet pressure between atmospheric pressure and 650
hPa (abs.) in order to guarantee that the outlet gas tempera-
ture will not exceed 80°C.
l
Close the injection of cooling liquid (INJ) in the cylinder
u
Let the vacuum pump run for 1 minute
l
Stop the vacuum pump
l
Close the cooling liquid supply (CL)
l
The system must be disconnected from the power supply
Re-start procedure following an Emergency Shut Down
of the system
Prior to attempting to restart the system, ascertain the reason for the
emergency shut down and rectify the fault.
u
With the pump electrically isolated from the power supply and
vacuum system, all appropriate safety precautions, work per-
mits, warning boards, safety equipment and perimeter must be
put into place.
u
Drain and collect any residual liquids from the pumping cham-
ber, in compliance with all local restrictions and requirements.
Ensure the pump is free to rotate by hand. Once assured that
the pump is empty, replace all previously removed drain plugs.
When the work has been completed follow the procedure "Start-up
procedure after maintenance"
l
Remove the warning board and safety perimeter
l
Check the lubrication oil levels according to chapters "Checking
the oil level"
l
Connect the pump to the power supply
l
Make sure that the "Installation Prerequisites" are followed
l
Open the cooling liquid supply (CL)
l
Start the vacuum pump
l
Open the injection cooling liquid into the cylinder (INJ), adjust the
flow rate to the required amount to maintain the pump outlet tem-
perature <80°C.
Maintenance
DANGER
In case the vacuum pump has conveyed gases that have been
contaminated with foreign materials that are dangerous to health,
the oil and condensates will also be contaminated.
These foreign materials can infiltrate the pores, recesses and other
internal spaces of the vacuum pump.
Danger to health when the vacuum pump is dismantled.
Danger to the environment.
Always wear protective clothing when carrying out maintenance
work.
Before any maintenance work, the inlet and outlet piping as well as
the vacuum pump itself must be flushed with nitrogen.
General information
Please follow the comments and recommendations given below:
WARNING
The inside of the vacuum pump must regularly be checked for de-
posits and be cleaned as and when necessary, for example by pur-
ging the pump. Deposits can cause friction and sparks inside the
pump, which must be avoided under all circumstances. Danger of
explosion!
Control points exist at the inlet and outlet of the vacuum pump.
For better control, the use of endoscopes is recommended.
DANGER
Any intervention on the pump must be carried out under scupu-
lous observation of the applicable safety regulations, and must
only be executed by qualified and trained personnel. If dangerous
substances of any kind are present, the operator must imperatively
inform the personnel charged with the maintenance and give them
the necessary instructions before work can begin.
Prior to any intervention on the pump, it is important to make sure
that there is no risk coming from processed substances or other
substances inside or outside the pump for the personnel charged
with maintenance.
WARNING
Opening the vacuum pump is only authorised after it has stopped,
and in absence of explosive atmospheres.
WARNING
The bearings must be changed every 16’000 operating hours, be-
cause damage to the bearings would increase the risk of explosion.
All other assembly, repair or maintenance work must be carried out by
specialised mechanics of the BUSCH After Sales Service.
The electrical installation
must be controlled every 8’000 operating
hours for correct operation and possible damage. This also includes the
monitoring system of the vacuum pump and the potential equaliser.
NOTE:
This maintenance procedure is not obligatory if the vacuum
pump is not used for drawing explosive gases or vapours. However, it
can be carried out if the operator believes it to be necessary.
CAUTION
Only authorised personnel may carry out any dismantling on the va-
cuum pump. Before work begins, the operator of the vacuum pump
must fill in a form or a “Declaration Regarding Contamination of
Vacuum Equipment and Components” that provides information on
possible dangers and appropriate measures.
If this form has not been filled in completely and signed by a res-
ponsible person, the vacuum pump may not be dismantled.
CAUTION
Before any maintenance work is started, a safety perimeter of at
least 1 [m] around the machine must be set up.
CAUTION
During operation the surface of the vacuum pump may reach tem-
peratures in excess of 70 °C.
Risk of burns!
Maintenance
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