Maintenance
CAUTION
In case the vacuum system has conveyed gases that have been con-
taminated 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 system.
Danger to health when the vacuum system 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 system itself must be flushed with nitrogen.
CAUTION
Only authorised personnel may carry out dismantling work on the
vacuum system. Before work begins, the operator of the vacuum
system must fill in a form or a “Declaration Regarding Contamina-
tion of Equipment and Components” that provides information on
possible dangers and appropriate measures.
If this form has not been filled in completely and signed, the
vacuum system may not be dismantled.
CAUTION
Before maintenance work is started, a safety area of at least 610
[mm] around the machine must be set up.
CAUTION
The surface temperature of the vacuum system can exceed 50°C
when the vacuum system is in operation.
Danger of burns!
Before starting maintenance work, make sure that the vacuum system
has been switched off and that it cannot be switched on again acciden-
tally. Follow the shutdown procedure in the section “Lock Out/ Tag
Out procedure” depending on the needs of maintenance:
–
in REMOTE mode, the start/ stop drive of the vacuum system
passes through the main machine interface of the vacuum system
(the one connected to TOOL) and the COMBI COBRA DS start
simultaneously.
–
in LOCAL mode, the start/ stop drive of the COMBI COBRA DS is
done independently. For safety reasons, execute the start of the
COMBI COBRA DS simultaneously.
–
stop the vacuum system with the remote control (press on STOP
button during 10s)
–
press on emergency stop button
–
switch off the main circuit breaker
–
open the power box and switch off the circuit breakers
–
switch off the customer’s power supply
–
switch off the water (inlet first, then outlet) and nitrogen quick
connections (cooling of the pumps is quickly done by not switching
off the water connections).
–
depending on the maintenance type, let the vacuum system cool in
order to avoid burn (rapid cooling of the vacuum pump wished or
not)
–
put the label or warning board “Maintenance processing” on or
next to the vacuum system
CAUTION
The oil temperature can reach a value of 90°C!
Danger of burns!
l
Make sure that the oil circuit and the coolant circuit have been
emptied before moving the vacuum system
l
Make sure that there are no cleaning tools in the vacuum system
anymore according to local and national regulations
Before pulling off the different connections, make sure that the intake
and exhaust lines of the vacuum system correspond to atmospheric
pressure.
When the maintenance work has been finished, follow the procedure
"Safety Lockout Procedure":
–
take off the label or warning board "Maintenance processing"
–
check the cooling liquid and oil levels according to the chapters
"Checking the oil level"
–
open the power box cover and check that the thermal relays are
on position “ON”
–
close the cover
–
release the emergency stop button and the lock
–
switch on the main circuit breaker
–
switch on the water (outlet first, then inlet) and nitrogen quick
connections
–
make sure that the "Necessary installation instructions" are
followed
–
start the vacuum system with the LCD or interface box (press on
START button)
Maintenance program
NOTE
: The maintenance intervals depend on the operating conditions.
The following intervals are basic values, which can be shortened or
lenghtened depending on operating conditions. In especially difficult
operating conditions such as, for example, a very dusty environment
the maintenance intervals must be shortened considerably.
Daily:
l
Check the oil level and the colour of the oil (see "Checking the
oil")
l
Check the level of the cooling liquid (see "Checking the cooling
liquid")
l
Check the cooling water (see "Checking the cooling water")
l
Check the nitrogen flow (see "Checking the nitrogen")
Weekly:
l
Inspect the vacuum system for oil leaks - if there are leaks, repair
the vacuum system (Busch)
l
Inspect the vacuum system for leaks of cooling liquid - if there are
leaks, repair the vacuum system (Busch)
l
Inspect the vacuum system for oil cooling water - if there are leaks,
repair the vacuum system (Busch)
Monthly:
In the case of operation in a dusty environment:
u
Make sure that the operating room is clean and free of dust;
clean if necessary
l
Make sure that the vacuum system has been switched off and that
it cannot be switched on again accidentally
l
Check the electrical connections
l
Carry out a visual inspection of the vacuum system
Maintenance
COBRA DS 8163 A
Page 26
0870772605
Содержание COBRA DS 8163 A
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