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Safety information
Prevent backup in
the outlet line
Observe hazards
during venting
Possible residual
energy
18
ð Be aware of the max. pressures at the inlet and outlet of the
pump as well as the max. admissible differential pressure
between the inlet and outlet, according to the technical
data.
ð The system to be evacuated as well as all hose connections
must be mechanically stable.
ð Fix coolant hoses to the hose nozzles such that they cannot
inadvertently become loose.
Prevent condensate return
Condensate can damage the pump head. Condensate must not
flow back into the outlet and pump head through the hose line.
Liquid must not accumulate inside the exhaust gas hose.
ð Avoid condensate return by using a separator. Condensate
must not enter the inside of the housing via the hose lines.
ð Preferably route the exhaust gas hose with a fall from the
outlet, i.e., running downward so that no backup can form.
ð Incorrect measurements due to a blocked vacuum line, e.g.,
condensate in the vacuum line, can distort the measure-
ments taken by the vacuum sensor.
ð Avoid overpressure in the suction line (>/ 1060 mbar
[>/ 795 Torr]).
Hazards during venting
Depending on the application, explosive mixtures can form or
other hazardous situations can arise in systems.
Hazards due to residual energy
After the vacuum pump has been switched off and disconnected
from the power supply, there may still be dangers due to resid-
ual energy:
Thermal energy: motor waste heat, hot surface, compres-
n
sion heat.
Electrical energy: the installed capacitors have a discharge
n
time of up to 3 minutes.
Before any action:
ð Allow the vacuum pump to cool down.
ð Wait until the capacitors have discharged.
20901367_EN-US_PC3001 VARIO select Serie_V1.3_100720
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