A746-02-885 Issue A
Page 2
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Introduction
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If the equipment is brought from cold environment into a room for operation, allow the equipment to warm
up (pay attention to water condensation on cold surfaces).
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Make sure ventilation is adequate if pump is installed in a housing or if ambient temperature is elevated.
Obey all relevant safety requirements (regulations and guidelines) and adopt suitable safety measures.
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Provide a firm level platform for the equipment and check that the system to be evacuated is mechanically
stable and that all fittings are secure.
Note:
Flexible elements tend to shrink when evacuated.
Due to the high compression ratio of the pumps, pressure at the outlet port might be generated being higher than
the max. permitted pressure compatible with the mechanical stability of the system.
Ensure that the system design does not allow the exhaust pipeline to become blocked:
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Avoid overpressure of more than 0.2 bar in case inert gas is connected.
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The diameter of the inlet and outlet pipeline should be at the least as large as the diameter of the pump
connection pipelines.
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Adopt suitable measures in case of differences, e. g. using the equipment outdoors, installation in altitudes
of more than 1000 m above mean sea level, conductive pollution or moisture.
WARNING
Obey maximum permitted pressures and pressure differences, see
Technical data. Do
not operate the pump with overpressure at the inlet.
WARNING
Do not permit any uncontrolled pressurizing (e. g. make sure that the exhaust pipeline cannot
become blocked). If you have an exhaust-isolation valve, make sure that you cannot operate the
equipment with the valve closed. Risk of bursting!
WARNING
Pay attention to symbol “hot surfaces” on the equipment. Adopt suitable measures to prevent any
danger arising from the formation of hot surfaces or electric sparks.
WARNING
The pumps are not suitable to pump dangerous or explosive gases or explosive or flammable
mixtures. Ensure that the materials of the wetted parts are compatible with the pumped
substances, see
Technical data.
Adopt suitable measures to prevent the release of dangerous, explosive, corrosive or polluting
fluids.
Use inert gas for gas ballast or venting if necessary.
The user must take suitable precautions to prevent any formation of explosive mixtures in the
expansion chamber. In case of a diaphragm crack, mechanically generated sparks, hot surfaces or
static electricity may ignite these mixtures.
Take adequate precautions to protect people from the effects of dangerous substances (chemicals,
thermal decomposition products of fluoroelastomers), wear appropriate safety clothing and safety
glasses.
Obey applicable regulations when disposing of chemicals. Take into consideration that chemicals
may be polluted.
