2. Important safety information
2.1 Mechanical hazards
CAUTION: LOSS OF STABILITY DURING TRANSPORT
Uncontrolled movement due to incorrect attachment / lifting / carrying / rolling or
movement of the vacuum pump. Only use the attachment points and conveying means
described in this manual for vertical and horizontal conveying.
WARNING: EJECTION OF PARTS
Ejection of parts through bursting of vacuum system due to excessive pressure caused by
incorrect direction of rotation. Pressure build-up in the vacuum system or in vacuum
chambers. Check the direction of rotation of the vacuum pumps before each start-up,
after each motor change and after each electrical connection change.
Ejection of parts through bursting of vacuum system as a result of excessive pressure
caused by clogged or constricted exhaust. Pressure build-up in the vacuum system or
exhaust pipes. Do not start up or operate the vacuum system with the outlet closed or
throttled.
Ejection of parts through bursting of vacuum system due to excessive pressure, caused by
faulty function at the gas inlet into the vacuum system. Pressure build-up in the vacuum
system or inlet lines. Check correct connection of inlet and outlet flanges before
commissioning. The inlet pressure at the suction port of the vacuum system must not
exceed atmospheric pressure. If seal gas or gas-ballast from pressure vessels is used,
secure the supply in such a way that no overpressure can occur in the vacuum system in
the event of a fault or power interruption.
Ejection of parts through bursting of vacuum system as a result of excessive pressure
caused by the pump running backwards after it has been switched off under vacuum.
Danger of overpressure in the inlet lines and recipients as well as uncontrolled backward
running of rotors. In the event of a fault or during service, separate the vacuum pumps
from the vacuum vessel and connecting lines before the inlet by means of suitable valves.
WARNING: RISK OF CUTTING AND CRUSHING
Risk of cutting and cutting off by contact with moving parts such as couplings, shafts and
rotors.
Risk of cutting and crushing when reaching into open flanges or covers.
Do not operate the vacuum pump with open flanges or covers. When installing, first
mechanically connect the inlets and outlets, close the covers of rotating parts and then
make the electrical connections. Disconnect the vacuum pump from the power supply
before servicing. Only use trained service personnel.
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A41802880_C - Important safety information
