Elmo Rietschle S-VSI 300(42) - Manual (Page 19)

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Installation
5.3 Connecting pipes
a) Vacuum connection at (Fig. 2/A, 3/A).
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.
b) The discharged air can be blown out through the
exhaust silencer at (Fig. 3/B) or conducted away
using a hose or a pipe.
NOTICE
The air vent (Fig. 3/B) must not be closed or
restricted.
Counter pressures on the outlet side are only
permissible up to:
S-VSI (42) 7.5 kW < + 0.2 bar
S-VSI (42) 5.5 kW < + 30 mbar
Prevent liquids accumulating in the exhaust
line.