Elmo Rietschle V-VTA 60/80/100/140 - Manual (Page 15)

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Installation
5.3 Connecting pipes
a) Vacuum connection at (Fig. 2/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.
Bei zu enger und / oder langer Saugleitung
vermindert sich das Saugvermögen der Vaku-
umpumpe.
b) Check to ensure the suction pipe is connected
correctly
NOTICE
Length of the connection pipes
With connection pipes that have the same pipe
cross section as the machine connection and are
more than 3m long, a non-return valve especially
for the purpose must be installed in order to avoid
reverse operation when the machine has stopped.
5.4 Control and relief valve
The vacuum can be set by turning the control knob
(Fig. 2/C) as shown on the symbol fi tted to the but-
ton.
NOTICE
Do not operate without the standard control
and relief valve.
If the permissible fi nal compression pressure is
exceeded (see data plate) the machine may be
damaged.