●
Firmly reinsert the drain plug (n, 95) together with the seal ring
(96)
●
Dispose of the used oil in compliance with applicable regulations
Flushing the Vacuum Pump
WARNING_ad
Degraded oil can choke pipes and coolers.
Risk of damage to the vacuum pump due to insufficient lubrica
-
tion.
Risk of explosion due to overheating.
If there is a suspicion that deposits have gathered inside the
vacuum pump the vacuum pump shall be flushed.
●
Make sure that all the used oil is drained
●
Make sure that the used oil filter (h, 100) is still in place
●
Create 1.0 litres flushing agent from 50 percent oil and 50 percent
paraffin or diesel fuel/fuel oil
●
Make sure that the drain plug (n, 95) is firmly inserted
●
Remove the filling plug (l, 88)
●
Fill in the flushing agent
●
Firmly reinsert the filling plug (l, 88)
●
Close the suction line
●
Run the vacuum pump for at least half an hour
● Drain the flushing agent and dispose of it in compliance with appli-
cable regulations
Note: Due to the use of paraffin and even more in case of using diesel
fuel/fuel oil, an unpleasant odour can occur after recommissioning. If
this is a problem, diesel fuel/fuel oil should be avoided and the vacuum
pump be run at idle in a suitable place until the unpleasant odour
vanishes.
Checking the Float Valve
(version with float valve and oil return line only)
Note: It is essential that the float valve (j, 200) works properly, so that
the vacuum pump will achieve the intended ultimate pressure and no
oil will be expelled out of the discharge connection (c, 155).
●
Make sure that the vacuum pump is shut down and locked against
inadvertent start up
●
Prior to disconnecting pipes/lines make sure that the connected
pipes/lines are vented to atmospheric pressure
●
Remove the discharge line, if necessary
●
Remove the exhaust cover (c, 155)
●
Remove the oil from the floater chamber with the aid of a suction
hose or a wash bottle
●
Undo the screws (341) and remove the fan cover (e, 340)
Note: While undoing the banjo fitting of the oil return line (j, 195) a
small amount of oil will leak out: keep a cleaning rag ready. Be careful
not to lose the sealing rings of the banjo fitting.
●
Undo the banjo fitting of the oil return line (j, 195) from the oil
separator (o, 75) and bend the oil return line a little bit aside
●
Undo the two screws of the flange of the float valve (j, 200) and
pull the float valve out of the oil separator (o, 75)
●
Check the cleanliness and function of the float valve (j, 200), blow
out with compressed air, if necessary
●
Make sure that the o-ring on the flange of the float valve is in
place and undamaged, replace with a new o-ring, if necessary
●
Insert the float valve (j, 200) in the proper orientation into the oil
separator (o, 75) and fasten it with two screws and lock washers
●
Connect the banjo fitting of the oil return line (j, 195) to the oil
separator (o, 75) with the hollow-core screw and two seal rings
●
Fasten the fan cover (e, 340) to the vacuum pump with the screws
(341)
Only if the exhaust filter (p, 122) is not meant to be changed, too:
◆
Make sure that the seal (141) under the exhaust cover (c, 155)
is clean and undamaged, if necessary replace with a new seal
(141)
◆
Mount the exhaust cover (c, 155) together with the seal (141),
hex head screws (146) and lock washers on the oil separator
(o, 75)
◆
If necessary connect the discharge line
Replacing the Oil Filter
●
Make sure that the oil is drained
●
Remove the oil filter (h, 100)
●
Apply a drop of fresh oil on the seal ring of the new oil filter (h,
100)
●
Mount the new oil filter (h, 100) and tighten it by hand
Filling in Fresh Oil
●
Keep 1.0 litres oil acc. to the table Ú Oil ready
Note: The amount given in these operating instructions is a guide. The
sight glass (m, 83) indicates the actual amount to be filled in.
●
Make sure that the oil outlet plug (n, 95) is firmly inserted
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.
● Remove the filling plug (l, 88)
● Fill in approx. 1.0 litres of oil
● 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)
Exhaust Filter
Checks during Operation
Busch recommends the use of a filter pressure gauge (available as ac
-
cessory, Ú Accessories). Without filter pressure gauge the filter resis
-
tance shall be assessed on the basis of the drive motor current drawn.
Version with exhaust filter pressure gauge:
◆
Remove the suction line from suction connection (d, 260) (un
-
restricted suction!)
◆
Check that the reading on the filter pressure gauge is in the
green field
◆
Reconnect the suction line to the suction connection (d, 260)
Version without filter pressure gauge:
◆
Make sure that the vacuum pump is running
◆
Check that the drive motor current drawn is in the usual range
Version with oil return valve (f, 280):
Note: The discharged gas will also contain oil if the vacuum pump is
operated without interruption for too long a period (Ú Installation and
Commissioning à Operation Notes).
●
Check that the discharged gas is free from oil
RA 0025 - 0040 F Maintenance
0870139077 / 051214 page 11
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