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Idiomas disponibles
Maintenance and Servicing
When maintaining these units and having such situa-
tions where personnel could be hurt by moving parts or
by live electrical parts the pump must be isolated by totally
disconnecting the electrical supply. It is imperative that the
unit cannot be re-started during the maintenance operation.
Do not maintain a pump that is at its normal operating
temperature as there is a danger from hot parts.
Handling of inflammable or aggressive gases and va-
pours is only possible with special versions, if the
safety instructions XE 1 are noted.
1. Lubrication (picture
)
The bearings of the blower units need to be greased every 6.000
operating hours or at least once a year with 30 g grease. (see
4 greasing points (L)). We recommend Esso Unirex N3, Chev-
ron SRI Grease 2 or other equivalent greases (see label for
recommended grease (M)).
2. Air filtration (picture
)
The capacity of the vacuum pump can be reduced if the
air inlet filters are not maintained correctly.
These inlet filter cartridges (f) should be cleaned monthly and
changed yearly depending on the degree of contamination.
Inlet cartridge cleaning: Remove thumb screws (m). Remove filter cover (d)
complete with gasket. Pull filter cartridges (f) off and clean either by knocking out
by hand or by using compressed air. Reassemble in reverse order.
3. Coupling (picture
)
The coupling rubbers (k) are wearing parts and should be checked regularly. When
the coupling rubbers are worn this can be detected by a knocking sound when the
vacuum pump is started.
Defective coupling rubbers can cause extensive damage and even in
some extreme cases break the blower shaft.
To check the coupling stop the motor (m) and isolate. Remove the screws (s
off the motor together with the motor side coupling half (q). If the coupling
rubbers (k) are damaged remove the circlips (l) from the coupling bolt (r) and
exchange the coupling rubbers (k). Leave the spacer (p) in place, check the
coupling bolts (r) for any wear and replace if necessary. To replace, screw off
motor flange cover (n), remove the countersunk screw (w
off the coupling (q
) from the blower shaft. Remove the nut (w) with washer (u) and
1
exchange the coupling bolts.
Re-assemble in reverse order.
4. Cooling (pictures
and
The space between the cooling fins (E
can be cleaned, by blowing out with compressed air, after removing the
grill (G
) and (G
) and the cover cap (G
1
3
Trouble Shooting:
1.
Blower does not reach operating speed when starting:
1.1 Check that the incoming voltage and frequency corresponds with the motor data plate.
1.2 Check the connections on the motor terminal block.
2.
Motor starter cuts out blower:
2.1 Problem as per 1.1 and 1.2.
2.2 Incorrect setting on the motor starter.
2.3 Motor starter trips too fast.
Solution: Use a motor starter with a time delay trip (version as per IEC 947-4).
2.4 Back pressure on the exhaust pipework is excessive.
3.
Insufficient suction capacity:
3.1 Inlet filters are obscured.
3.2 Suction pipe work is too long or too small.
3.3 Leak on the pump or on the system.
4.
Vacuum pump does not reach ultimate vacuum:
4.1 Check for leaks on the suction side of the pump or on the system.
5.
Vacuum pump operates at an abnormally high temperature:
5.1 Ambient or suction temperature is too hot.
5.2 Cooling air flow is restricted.
5.3 Problem as per 2.4.
) with washer (u
1
)
) may become clogged by dust. They
1
).
2
f
E
1
). Pull
5
), pull
1
d
m
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