Varian 969-9069 Serie Mode D'emploi page 38

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CAUTION
Exercise care when tightening nuts and bolts to
avoid creating dents in the envelope as this may
cause the pump rotor to lock.
High Vacuum Flange Connection Configurations
Fore-vacuum Pump Connection
A flange KF 25 NW is available to connect the
Turbo-V300SF to the fore-vacuum pump. A hose
or vacuum approved pipe can be used. If a rigid
pipe is used, any vibration generated by the me-
chanical pump must be eliminated through the use
of bellows.
NOTE
The Turbo-V300SF is characterized by its high
compression ratio also for oil vapors. When using a
mechanical oil-sealed pump, it is advisable to in-
stall a suitable trap between the turbopump and the
fore-vacuum pump in order to prevent oil back-
streaming.
Electrical Connection
The turbopump is connected to the controller
through an 6-pin connector. Pins B, C and D are
the 3-phase supply to the motor, pins A and F are
connected to the temperature sensor (NTC type,
30 KΩ resistance at 25° C) and pin E is connected
to the pump ground.
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TECHNICAL INFORMATION
87-900-882-01(B)