Operation
21300758785_001_C1 - 06/2019 - © Leybold
After a pumpdown cycle leave the pump to operate for at least 30 minutes
approx. with the gas ballast open and the intake line closed until it is dry
again.
With the gas ballast valve opened the vacuum vessel will be vented in the
event of a power failure.
Swapping out the gas ballast switch
The gas ballast switch can be swapped for a solenoid valve or a purge gas
connector.
To do this, unscrew the gas ballast switch from the pump using a 6 mm Allen
key.
Then, screw in a suitable solenoid valve or purge gas connector with a quar-
ter-inch thread. Max torque = 8 Nm.
Following assembly, check for leaks in the pump in order to ensure optimum
vacuum performance.
When connecting a gas supply to the gas ballast, reduce the pressure to 0.5
bar(g).
NOTICE
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