BUSCH 7180551, Installation And Maintenance Instructions Manual

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Recommendations on operation
Use
WARNING
The vacuum pump is designed for operation under the conditions
described below.
In case of disrespect of the above, risk of damage or destruction of
the vacuum pump!
The vacuum pump must only be operated under the conditions
described below.
The COBRA NC 400 B vacuum pump with the certification:
Inside II 2G Ex h IIB T3 Gb X
Outside No ATEX Zone
is certified for drawing explosive gases and vapour mixtures out of and
in zone 1. It should not be used in an environment around the pump
which is potentially explosive.
The vacuum pump can draw explosive gases or vapours of explosion
group IIB and temperature class T3 without restriction. Please also note
the corresponding explosion protection markings on the pump and the
switch-off temperature settings in the relevant chapters.
The vacuum pump should not be used for the handling of explosive
atmospheres that can auto-destruct or are chemically instable.
Max. permissible number of startings per hour: 6.
The maximum authorised ambient temperature is situated between
-20°C and +40 C.
The temperature of the drawn gases must be inferior to 100°C .
The authorised back pressure at the exhaust is 100 hPa. If there is a risk
that this back pressure could exceed 100 hPa, a pressure switch must
be fitted at the exhaust which will stop the pump as soon as the back
pressure exceeds the set value.
The vacuum pump must only be used when its components and
protective coatings are resistant to chemical influences (e.g. corrosion)
during operation, in order to maintain the explosion protection cover.
This is particularly applicable for the safety devices, such as the
temperature sensors and pressure switches.
WARNING
When using toxic, inflammable and/ or explosive gases, make sure
that the system corresponds to applicable local and national safety
regulations and that all applicable safety measures are followed.
All product-specific safety regulations must be observed.
Solid particles must not enter the vacuum pump. In case of process
errors, the pump can draw in a certain amount of liquids. If the pump
has drawn in liquid, a short drying run will be necessary at the end of
the process and, in case a silencer (accessory) is mounted at the outlet:
u
Drain the silencer (accessory)
The vacuum pump is thermally suitable for continuous use at any
pressure between atmospheric pressure and ultimate pressure.
CAUTION
During operation the surface of the vacuum pump can exceed
temperatures of 90°C.
Risk of burns!
The vacuum pump must be protected against contact during
operation. If touching the pump is unavoidable, wait until the
surface temperature has cooled down or wear protective gloves.
CAUTION
The sound level of the pump within a certain perimeter of the pump
is high.
Risk of hearing damage.
Users who are spending a longer period of time in the vicinity of a
non-insulated vacuum pump, must wear suitable ear protection.
CAUTION
The COBRA NC vacuum pumps are always delivered without oil.
Operation without oil will destroy the vacuum pump within a short
period of time.
The vacuum pump must remain in a horizontal position once it has
been filled with oil.
CAUTION
The COBRA NC vacuum pumps are always delivered without
cooling liquid.
Operation without cooling liquid will destroy the vacuum pump
within a short period of time!
l
Make sure that all provided covers, guards, hoods etc. remain
fitted
l
Make sure that protective devices will not be disconnected
l Make sure that there is no leakage in the system, the escape of
dangerous substances must be avoided
l Make sure that the “Installation Prerequisites” are complied with
and will remain so, and ensure that adequate cooling is guaranteed
If the pump is shut down for a longer period of time:
CAUTION
If there is a risk of frost, all the cooling water must be drained out of
the vacuum pump if the pump is shut down for a longer period of
time!
–
Drain the cooling liquid
u Remove the cooling liquid filler plug (CLF)
u
Remove the cooling liquid drain plugs (CLD)
u Drain the cooling liquid completely
u Refit the cooling liquid drain plugs again
u Refit the cooling liquid filler plug (CLF)
u Collect the cooling liquid and re-use it or dispose of it
according to local or national regulations
NOTE : When the pump has not been in operation for a few days or
when a sticky substance has been drawn, it is possible that the two
rotor screws of the COBRA NC vacuum pump stick to each other.
Unscrew the access cover to the rotor screws (situated on the
cylinder-cover at the inlet side (B-side)...). Loosen the rotors from each
other with an Allen key and an extension by turning them clockwise by
hand.
Switching the vacuum pump on/ off
First start-up of the vacuum pump
l
Make sure that the “Installation Prerequisites” are followed
l Preparation / Start-up of the vacuum pump
u Open the barrier gas
u Before the actual start-up of the vacuum pump, the inside of
the vacuum pump has to be inertised if it cannot be excluded
Installation and Commissioning
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