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4. Air filtration (picture
)
The capacity of the vacuum pump can be reduced if the air inlet filters are not maintained correctly.
The filter cartridges (e) and (f ➝ optional extras) have to be cleaned depending on the amount of contamination. This is achieved by blowing
compressed air from the inside of the cartridge outwards.
Even if the cartridges are cleaned their separating efficiency deteriorates. We would therefore recommend exchanging the cartridges half-yearly.
The filter cartridges (e) and (f) can be removed for cleaning after removing the thumb screws (h) and the filter housing cover (g).
5. 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 pump is started.
Defected coupling rubbers can cause extensive damage and even in some extreme cases break the rotor shaft.
To check the coupling, stop the motor (m) and isolate. Remove the screws (s
on the motor flange (n). Pull 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, remove the circlip (l
and fan (v) complete from the pumpshaft, remove the nut (w) with washer (u)
and exchange the coupling bolts.
Re-assemble in reverse order.
Trouble Shooting:
1.
Motor starter cuts out vacuum pump:
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.
1.3 Incorrect setting on the motor starter.
1.4 Motor starter trips too fast.
Solution: Use a motor starter with a time delay trip (version as per IEC
947-4).
2.
Insufficient suction capacity:
2.1 Inlet filters are obscured.
2.2 Suction pipe work is too long or too small.
2.3 Leak on the pump or on the system.
2.4 Blades are damaged.
3.
Vacuum pump does not reach ultimate vacuum:
3.1 Check for leaks on the suction side of the pump or on the system.
3.2 Blades are worn or damaged.
4.
Vacuum pump operates at an abnormally high temperature:
4.1 Ambient or suction temperature too high.
4.2 Cooling air flow is restricted.
4.3 Filter cartridge on the exhaust side is contaminated.
5.
Unit emits abnormal noise:
5.1 The pump cylinder is worn.
Solution: send your complete unit off for repair to the supplier or
approved service agent.
5.2 The regulating valve is noisy.
Solution: replace valve.
5.3 Blades are damaged.
Appendix:
Repair on Site: For all repairs on site an electrician must disconnect the motor so that an accidental start of the unit cannot happen.
All engineers are recommended to consult the original manufacturer or one of the subsidiaries, agents or service agents. The address of the nearest
repair workshop can be obtained from the manufacturer on application.
After a repair or before re-installation follow the instructions as shown under the headings "Installation and Initial Operation".
Lifting and Transport: To lift and transport the VTA units the eye bolt on the pump must be used.
The weight of the pumps are shown in the accompanying
table.
Storage: VTA units must be stored in dry ambient conditions
with normal humidity. We recommend for a relative humidity
of over 80% that the pump units should be stored in a closed
container with the appropriate drying agents.
Disposal: The wearing items (as listed in the spare parts
lists) should be disposed of with due regard to health and
safety regulations.
Spare parts lists: E 250 / 1 ➝ VTA 60 - VTA 140 (01)
E 250 / 2 ➝ VTA 60 - VTA 140 (31)
)
5
), pull off the coupling
1
VTA
Noise level (max.)
Weight (max.)
Length (max.)
Width
Height
e
g
h
60
50 Hz
78
dB(A)
60 Hz
80
kg
76
mm
737
mm
405
(01)
320
mm
(31)
366
f
80
100
140
78
79
81
80
82
83
80
97
111
771
853
870
405
405
405
320
320
320
366
366
366
8.03
/ PM7
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