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Maintenance and Servicing
Please pay attention to the valve arrangements (C) and (D)!
(A) – Connection suction side
(B) – Connection pressure side
(C) – Valve (400656)
(D) – Valve with hole (400656-4)
(E) – Gas ballast valve
Fig. 6 Valve arrangement
6.2.3
Test
• Connect the pump to the electrical supply.
• Connect a vacuum measuring device to the suction connector and measure the ultimate
pressure.
If the device is working properly, then the figure stated in the technical data must be at-
tained within a maximum of one minute.
• The pump must not make any abnormal noises.
• Moving parts must not touch each other.
16
400082
CAUTION !
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