Prerequisite
● Required mains connection established
Switching on the vacuum pump
1. If required, switch the vacuum pump on in each pressure range at the mains switch.
2. Allow the vacuum pump to warm up prior to process start, with the vacuum connection closed.
The vacuum pump achieves the specified throughput and final pressure values once the operating tem-
perature has been reached.
6.3 Operating the vacuum pump with gas ballast
WARNING
Explosion hazard from reactive, potentially explosive or other hazardous gas/air mixtures
Uncontrolled inlet of gas at the gas ballast valve leads to sparks generated mechanically following
diaphragm rupture, hot surfaces or to potentially explosive gas/air mixtures in the vacuum system
caused by static electricity.
► If necessary, use inert gas for supplying the flushing gas in order to avoid a potential ignition.
WARNING
Risk of poisoning due to toxic process gases escaping
For intake pressures > 500 hPa, process gas may escape from the open gas ballast valve. There is a
risk of injury and fatality due to poisoning in processes with toxic process media.
► If necessary, use inert gas to avoid potential contamination.
► If necessary, use an extraction line.
NOTICE
Risk of damage from condensation in vacuum pump
During operation without gas ballast, condensation may form as a result of the vapor compatibility of
the vacuum pump being exceeded.
► Pump condensable vapors only when the vacuum pump is warm and the gas ballast valve open.
► Allow the vacuum pump to run on after process end for another 30 minutes with the gas ballast
valve open.
– This protects the vacuum pump against corrosion.
Vapors or moisture from pumped media impair the throughput after condensation in the vacuum pump.
Operation
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