Safety information
20901118_EN-US_PC301x VARIO select Serie_V1.3_100720
19
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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.
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Avoid overpressure in the suction line (>/ 1060 mbar
[>/ 795 Torr]).
Hazards during venting
Observe hazards
during venting
Depending on the application, explosive mixtures can form or
other hazardous situations can arise in systems.
Hazards due to residual energy
Possible 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:
n
Thermal energy: motor waste heat, hot surface, compres-
sion heat.
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Electrical energy: the installed capacitors have a discharge
time of up to 3 minutes.
Before any action:
ð
Allow the vacuum pump to cool down.
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Wait until the capacitors have discharged.
Hazards due to hot surfaces or overheating
Surface tempera-
tures
The surface of vacuum pumps can reach temperatures > 70 °C
during operation, in particular when pumping out heated media.
ð
Avoid direct contact with the surface.
ð
Use protection against accidental contact if the surface tem-
perature is regularly elevated.
ð
Allow the vacuum pump to cool down before performing
maintenance work.
Overheating
The vacuum pump can be damaged due to overheating. Possi-
ble causes include insufficient air supply to the fan and/or failure
to maintain minimum distances.
ð
When installing the device, ensure that there is a minimum
distance of 5 cm between the fan and adjacent parts (such
as the housing, walls, etc.).
ð
Always ensure a sufficient air supply; if applicable, provide
external forced ventilation.
