Instruction manual

EXT Split Flow Compound Turbomolecular Pumps
OPERATION
PAGE
19
Mar 07 19 Issue F
4OPERATION
4.1 Start-up
Use the procedure below to start up a basic, manually-controlled pumping system with a manual vent-
valve and an EXDC version controller. Refer to the EXDC Instruction Manual.
1. Ensure the manual vent-valve is closed (turn clockwise to close it).
2. Turn on the cooling-water supply (if water-cooling is used) and/or switch on the power to the air
cooler.
3. Start the backing-pump.
4. When the vacuum system pressure is approximately 10 mbar or less, switch on the power supply
to start the EXT Split Flow Pump.
5. The pump will then accelerate to full operating speed. Once nominal operating speed is reached,
the normal speed LED on the EXDC Controller will illuminate.
Note: Refer to the controller manual if using the EXC Controller.
WARNING
Do not operate the EXT Split Flow Pump unless it is connected to your vacuum system.
If you do, the pump rotor can cause injury. The pump rotor rotates at very high speeds
and the rotating blades might not be visible.
WARNING
Do not move the pump whilst it is running. The gyroscopic forces generated by this
movement can cause excessive use of the back-up bearing and may result in catastrophic
failure of the pump.
WARNING
When power is restored following a power cut, the pump will re-start automatically. The
pump must remain connected to the vacuum system to prevent risk of injury.
WARNING
After power to the pump has been switched off, either through emergency or as a
requirement, the rotor will continue to spin at very high speeds. Until the rotor has
stopped it possesses considerable mechanical energy.