Thomas Industries Rietschle Thomas MACRO VTB 180 Instrucciones De Uso página 8

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 vacuum pump is started.
Defective 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
should also be removed. 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
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 Pump is trying to operate against a closed exhaust or without an unloading
valve on start/delta starting.
Solution: Optional extra, unloading valve model ZAE.
1.4 Incorrect setting on the motor starter.
1.5 Motor starter trips too fast.
Solution: Use a motor starter with a time delay trip (version as per IEC 947-4).
1.6 Back pressure on the exhaust pipework is excessive.
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 Problem as per 1.6.
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 (if fitted) 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 vacuum pump the eye bolts on the housing and motor must be used. If an eye bolt is missing use
suitably rated strops. The weight of the pumps are shown in the accompanying table.
Storage: VTB units must be stored in dry ambient conditions with normal humidity. We recommend for a relative humidity of over 80% that the pump
should be stored in a closed container with the appropriate drying agents.
Disposal: The wearing parts (as listed in the spare parts lists) should be disposed of with due regard to health and safety regulations.
E 267 / 1 ➝ VTB 180 - VTB 500 (01)
Spare parts lists:
E 267 / 2 ➝ VTB 180 - VTB 500 (31)
VTB
Noise level (max.) /
Sound power*
Weight (max.)
Length (max.)
Width
Height (max.)
), pull off the coupling and fan (v) complete from the pumpshaft, remove the nut (w) with
1
180
50 Hz 77
dB(A)
60 Hz 79
(01) 220
kg
(31) 230
(01) 1073
mm
(31) 1072
mm 568
(01) 450
mm
(31) 647
) on the motor flange (n). For motors secured by the feet, screws (s
5
250
78
80
220
230
1073
1072
568
450
647
340 500
80 86 / 96*
84 89 / 99*
390 495
410 515
1243 1444
1243 1444
704 714
575 575
807 807
)
6
8.03 / PM7