Elmo Rietschle VWP 2500 Betriebsanleitung Seite 8

4. Coupling (picture )
The tooth rim (k) is a wearing part and should be checked once a year.
Caution – defected tooth rim
Defected tooth rim can cause extensive damage and even in some
extreme cases break the rotor shaft.
To check the coupling, stop the motor and isolate. Remove the screws (s
Pull off the motor (m) together with the motor side coupling half (q). If the
tooth rim (k) is damaged or worn then exchange the rim.
Re-assemble in reverse order.
Trouble Shooting:
1. Motor starter cuts out Roots pump:
1.1 Check that 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 Protection mesh (optional extras) obscured.
2.2 Suction pipe work is too long or too small.
3. Pre-pump does not reach ultimate vacuum:
3.1 Check for leaks on the suction side of the Roots pump or on the system.
4. Roots pump operates at an abnormally high temperature:
4.1 Ambient or suction temperature too high.
4.2 Cooling air flow is restricted.
5. Sealing oil degrades rapidly:
5.1 Change sealing rings and the wearing sleeve of the shaft feedthrough (see under "servicing").
6. Roots pump emits abnormal noise:
6.1 The tooth rim is worn (see under "servicing").
6.2 Contamination of the piston.
Solution: Clean pumping chamber and piston.
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 Roots pump the eye bolts on the pump
planned tapped holes (X) (see picture
When setting down the pump take care on a safe stand.
or
Pump has a stable 4-point-support, but used to slightly cant when set-
ting down until the motor hangs up. The stability can only achieved
through screwing tightly.
The weight of the pumps is shown in the accompanying table.
Storage: The Roots pump 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 201 ➝ VWP 2500
Spare parts lists:
7
).
).
m
. For it must be screwed 2 eye bolts M 20 in the
must be used
VWP
Noise level (max.)
dB(A)
Sound power
Weight (max.)
Length
Width
Height
Oil capacity
s
1
q k
2500
50 Hz 82
60 Hz 87
60 Hz 92
kg 342
mm 1192
mm 535
mm 454
l 2,8
2.08 / PM7