Every Year:
●
Make sure that the vacuum pump is shut down and locked against
inadvertent start up
●
Replace the exhaust filter (p, 122) (à Exhaust Filter)
In case an inlet air filter is installed:
◆
Clean (with compressed air) or replace the inlet air filter
●
Check the inlet screen (261), clean if necessary
Version with gas ballast with sinter metal filter:
◆
Clean the sinter metal filter (compressed air)
Every 500 - 2000 Operating Hours (à Oil Life):
●
Change the oil and the oil filter (h, 100) (à Oil and Oil Filter
Change)
Version with float valve (j, 200) and oil return line
◆
Check the float valve (j, 200) (à Oil and Oil Filter Change
à Checking the Float Valve)
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 (o, 75)
●
Read the level on the sight glass (m, 83)
In case the level has dropped underneath the MIN-marking:
◆
Top up oil (à Topping up Oil)
In case the level exceeds the MAX-marking:
◆ Excessive dilution with condensates - change the oil and check
the process
◆ If appropriate retrofit a gas ballast (Busch Service) and observe
the chapter Ú Installation and Commissioning à Operation
Notes à Conveying Condensable Vapours
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 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 (d, 260) will result in
breakage of the vanes (r, 22) and destruction of the vacuum pump.
Oil may be filled through the filling port (l, 88) 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 (l, 88) is ejected.
Remove the filling plug (l, 88) only if the vacuum pump is stopped.
The vacuum pump must only be operated with the filling plug (l,
88) firmly inserted.
●
Make sure that the vacuum pump is shut down and locked against
inadvertent start up
●
Remove the filling plug (l, 88)
●
Top up oil until the level reaches the middle of the sight glass (m,
83)
●
Make sure that the level is between the MIN and the MAX-mark
-
ings of the sight glass (m, 83)
●
Make sure that the seal ring (89) is inserted into the filling plug (l,
88) and undamaged, replace if necessary
●
Firmly reinsert the filling plug (l, 88) together with the seal ring
(89)
Checking the Colour of the Oil
Note: The oil should be light, either transparent, a little foamy or a little
tarnished. A milky discolouration that does not vanish after sedation of
the oil indicates contamination with foreign material. Oil that is either
contaminated with foreign material or burnt must be changed (à Oil
Change).
Oil Life
The oil life depends very much on the operating conditions. A clean
and dry air stream and operating temperatures below 100 °C are ideal.
Under these conditions the oil and the oil filter (h, 100) shall be
changed every 500 to 2000 operating hours or after half a year.
Under very unfavourable operating conditions the oil life can be less
than 500 operating hours. Extremely short life times indicate malfunc
-
tions (Ú Troubleshooting) or unsuitable operating conditions, though.
Chosing a synthetic oil instead of a mineral oil can extend the oil life.
To select the oil best suited for your process please contact your Busch
representative.
If there is no experience available with regard to the oil life under the
prevailing operation conditions, it is recommended to have an oil ana
-
lysis carried out every 500 operating hours and establish the change in
-
terval accordingly.
Oil and Oil Filter Change
DANGER_age32
In case the vacuum pump conveyed gas that was contaminated
with harmful foreign material the oil and the oil filter will be con-
taminated with harmful material.
Danger to health during the changing of contaminated oil and oil
filters.
Danger to the environment.
Wear personal protective equipment during the changing of con
-
taminated oil and oil filters.
Contaminated oil and oil filters are special waste and must be dis
-
posed of separately in compliance with applicable regulations.
Draining Used Oil
Note: After switching off the vacuum pump at normal operating tem
-
perature wait no more than 20 minutes before the oil is drained.
●
Make sure that the vacuum pump is shut down and locked against
inadvertent start up
●
Make sure that the vacuum pump is vented to atmospheric pres
-
sure
●
Put a drain tray underneath the drain port (n, 95)
●
Remove the drain plug (n, 95) and drain the oil
When the oil stream dwindles:
●
Reinsert the drain plug (n, 95)
●
Switch the vacuum pump on for a few seconds
●
Make sure that the vacuum pump is shut down and locked against
inadvertent start up
●
Remove the drain plug (n, 95) again and drain the remaining oil
●
Make sure that the seal ring (96) is inserted into the drain plug (n,
95) and undamaged, replace if necessary
Maintenance RA 0025 - 0040 F
page 10 0870139077 / 051214
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