Edwards nEXT nEXT85 - Operation with Parallel Control and Monitoring; Start the Pump; Run the Pump at Standby Speed; Stop the Pump

6.3 Operaon with parallel control and monitoring
6.3.1 Start the pump
WARNING: EXPOSED ROTOR
Risk of injury. Do not operate the pump with its rotor exposed. Connect the pump to
the vacuum system before you operate the pump. If the pump is operated with its
rotor exposed, the pump rotor can cause injury as it rotates at high speeds and the
rotang blades are not visible.
WARNING: PUMP RESTART AFTER POWER CUT
Risk of injury. When the power is restored aer a power cut, the pump will restart
automacally. Keep the pump connected to the vacuum system to prevent risk of
injury.
CAUTION: PUMP MOVEMENT
Risk of damage to equipment. Do not move the pump when it is in operaon. The
gyroscopic forces generated by this movement can cause more use of the back up
bearing and can result in catastrophic failure of the pump.
In parallel control, the pump will accelerate to full operang speed when started.
To start the pump, link the start/stop control input to the 0 V control reference on the
logic interface connector.
The green indicator on the motor controller illuminates when the pump reaches normal
speed. This is 80% of the full rotaonal speed by default, but a dierent value can be
selected to suit the applicaon.
6.3.2 Run the pump at standby speed
If the pump operates at less than or more than the standby speed it will accelerate or
decelerate unl standby speed is reached.
1.
To operate the pump at standby speed, link the standby control input to the 0 V
control reference on the logic interface connector.
2.
To return the pump to full speed, disconnect the standby control input from the 0
V control reference on the logic interface connector.
6.3.3 Stop the pump
WARNING: MECHANICAL ENERGY IN ROTOR
Risk of injury. Aer the pump is set to o, the rotor will connue to rotate at high
speeds through an emergency or as a requirement. The rotor has mechanical energy
unl it slows down and stops.
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B8G000880_D - Operaon