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 (the oil shall still be warm when being
drained)
●
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
page 9: 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 (
Ú
page 10: 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 replace
In case of operation in a dusty environment:
◆
Clean as described under
Ú
page 9: 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 cowling, the fan wheel, the ventilation grille and the
cooling fins
Every Year:
●
Make sure that the vacuum pump is shut down and locked against
inadvertent start up
●
Replace the exhaust filter (
Ú
page 10: Exhaust Filter)
In case an inlet air filter is installed:
◆
Replace the inlet air filter
●
Check the inlet screen, clean if necessary
Version with gas ballast with paper filter:
◆
Replace the filter.
Every 500 - 2000 Operating Hours:
(
Ú
page 10: Oil Life):
●
Change the oil (
Ú
page 10: Oil Change)
Checking the Oil
Checking the Level
●
Make sure that the vacuum pump is shut down and the oil has col-
lected at the bottom of the oil separator (e)
●
Read the level on the sight glass (j)
In case the level has dropped below 50 percent of the sight glass (j):
◆
Top up oil (
Ú
page 9: Topping up Oil)
In case the level exceeds 75 percent of the sight glass (j):
◆
Excessive dilution with condensates - change the oil and check
the process
◆
If appropriate retrofit a gas ballast (Busch Service) and observe
the chapter Conveying Condensable Vapours (
Ú
page 8)
In case the level exceeds 75 percent of the sight glass (j) despite proper
use of the gas ballast:
◆
Replace t
he filter.
Topping up Oil
Note
: Under normal conditions there should be no need to top up oil
during the recommended oil change intervals. A significant level drop
indicates a malfunction (
Ú
page 13: Troubleshooting).
Note
: During operation the exhaust filter gets saturated with oil. It is
therefore normal that the oil level will drop slightly after replacement
of the exhaust filter.
CAUTION
_a
Filling oil through the suction connection (h) will result in breakage
of the vanes and destruction of the vacuum pump.
Oil may be filled through the filling port (d) only.
CAUTION
_a
During operation the oil separator is filled with hot, pressurised oil
mist.
Risk of injury from hot oil mist with open filling port.
Risk of injury if a loosely inserted filling plug (d) is ejected.
Remove the filling plug (d) only if the vacuum pump is stopped.
The vacuum pump must only be operated with the filling plug (d)
firmly inserted.
●
Make sure that the vacuum pump is shut down and locked against
inadvertent start up
●
Remove the filling plug (d)
●
Top up oil until the level reaches 75 percent of the sight glass (j)
●
Make sure that the seal ring is inserted into the filling plug (d) and
undamaged, replace if necessary
●
Firmly reinsert the filling plug (d) together with the seal ring
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