Operation
22 300758785_002_C1 - 06/2019 - © Leybold
4.4 Switching off / Decommissioning
Switching off
Stop the pump using the start/stop switch or via an interface. If the pump is
to be disconnected from the supply voltage, switch off the mains switch.
If the gas ballast valve is closed, rapid ventilation of the attached vacuum
vessel and damage to any turbomolecular pump which may be attached are
prevented by means of a check valve.
Decommissioning
If the pump is to be decommissioned for an extended period of time, the
pump should first be run dry and then evacuated.
The pump should then be switched off and removed from the system.
When the pump has been used to pump hazardous gases, introduce
appropriate safety precautions before opening the intake or the discharge
connections.
Close off the inlet aperture using the blank flange supplied with the unit.
Leave the outlet flange open or, if necessary, connect it to a suitable
exhaust system.
Start the pump and, with the gas ballast switch open, let it run for at least
30 minutes.
Thereafter, close the gas ballast switch and run the pump for a further
5 minutes.
Then, stop the pump and leave it connected to the power supply for
another few minutes to cool down (the ventilator continues to run).
Next, close off the pump’s outlet aperture using the blank flange supplied
with the unit, switch of the MAINS switch and remove the mains plug.
DANGER
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