CAUTION_ac
During operation the surface of the vacuum pump may reach tem
-
peratures of more than 70 °C.
Risk of burns!
The vacuum pump shall be protected against contact during opera
-
tion, it shall cool down prior to a required contact or heat protection
gloves shall be worn.
CAUTION_a
The gas conveyed by the vacuum pump contains remainders of oil.
Aspiration of process gas over extended periods can be harmful.
The room into which the process gas is discharged must be suffi
-
ciently vented.
●
Make sure that all provided covers, guards, hoods etc. remain
mounted
●
Make sure that protective devices will not be disabled
●
Make sure that cooling air inlets and outlets will not be covered or
obstructed and that the cooling air flow will not be affected ad
-
versely in any other way
●
Make sure that the installation Prerequisites (Ú Installation and
Commissioning à Installation Prerequisites) are complied with and
will remain complied with, particularly that a sufficient cooling will
be ensured
Oil Return
Only for version with oil return valve (f, 280):
During operation oil accumulates at the bottom of the upper chamber
of the oil separator (o, 75), which cannot flow down into the bottom
chamber, as long as the vacuum pump runs (for detailed description
Ú Product Description à Oil Recirculation).
At the latest after 10 hours of continuous operation, in case of high
pressure difference between suction side and pressure side after a
shorter period, the vacuum pump must be shut down for at least
15 minutes, so that the oil can run down from the upper chamber of
the oil separator (o, 75) into the bottom chamber. Note: This is a good
time to check the temperature, the level and the colour of the oil.
Conveying Condensable Vapours
CAUTION_a
Residual condensates dilute the oil, deteriorate its lubricating prop
-
erties and can cause a seizure of the rotor.
Apply a suitable operating method to make sure that no conden
-
sates remain in the vacuum pump.
In order to use the vacuum pump for the conveyance of
condensable vapours, the vacuum pump must be equipped with a
shut-off valve in the suction line and with a gas ballast valve.
Version with gas ballast device with ball-cock:
◆
Make sure that the ballast valve is open and will remain open
during operation
●
Close the shut-off valve in the suction line
●
Operate the vacuum pump with the suction line shut off for
approx. half an hour, so that the operating temperature rises to
approx. 75 °C
At process start:
●
Open the shut-off valve in the suction line
At the process end:
●
Close the shut-off valve in the suction line
●
Operate the vacuum pump for another approx. half an hour
Maintenance
DANGER_age32
In case the vacuum pump conveyed gas that was contaminated
with foreign materials which are dangerous to health, harmful ma
-
terial can reside in filters.
Danger to health during inspection, cleaning or replacement of fil
-
ters.
Danger to the environment.
Personal protective equipment must be worn during the handling
of contaminated filters.
Contaminated filters are special waste and must be disposed of
separately in compliance with applicable regulations.
CAUTION_ac
During operation the surface of the vacuum pump may reach tem
-
peratures of more than 70 °C.
Risk of burns!
●
Prior to action that requires touching of the vacuum pump, let the
vacuum pump cool down, however, if the oil is to be drained, for
no more than 20 minutes
● Prior to disconnecting connections make sure that the connected
pipes/lines are vented to atmospheric pressure
Maintenance Schedule
Note: The maintenance intervals depend very much on the individual
operating conditions. The intervals given below shall be considered as
starting values which should be shortened or extended as appropriate.
Particularly heavy duty operation, such like high dust loads in the envi-
ronment or in the process gas, other contaminations or ingress of pro-
cess material, can make it necessary to shorten the maintenance
intervals significantly.
Daily:
●
Check the level and the colour of the oil (Ú Checking the Oil)
Weekly:
●
Check the vacuum pump for oil leaks - in case of leaks have the
vacuum pump repaired (Busch service)
Monthly:
●
Check the function of the exhaust filter (p, 122) (Ú Exhaust Filter)
●
Make sure that the vacuum pump is shut down and locked against
inadvertent start up
In case an inlet air filter is installed:
◆
Check the inlet air filter, if necessary clean (with compressed
air) or replace
In case of operation in a dusty environment:
◆
Clean as described under à Every 6 Months:
Every 6 Months:
●
Make sure that the housing is free from dust and dirt, clean if nec
-
essary
●
Make sure that the vacuum pump is shut down and locked against
inadvertent start up
●
Clean the fan cowlings, fan wheels, the ventilation grilles and cool
-
ing fins
RA 0025 - 0040 F Maintenance
0870139077 / 051214 page 9
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