Elmo Rietschle V-VCB 20/25 - Manual (Page 15)

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Installation
5.3 Connecting pipes
NOTICE
Material damage resulting from the forces and
torques of the pipes on the unit being too high.
Only screw pipes in by hand.
The pumping capacity of the vacuum pump
is reduced if the suction pipe is too narrow
and/or too long.
The air vent (Fig. 1/B) must not be closed or
restricted.
Counter pressures on the outlet side are only
permissible up to + 0.1 bars.
Prevent liquids accumulating in the exhaust
line.
a) Vacuum connection (Fig. 2/A).
b) The extracted air can blow freely through the
exhaust air opening (Fig. 2/B).
5.4 Filling with lubricating oil
a) Fill the lubricating oil (for suitable types see the
“Maintenance” section) via the oil fi lling point
(Fig. 2/H) up to the upper edge of the sight glass
(Fig. 2/I).
b) Close the oil fi lling point.