Edwards nEXT730D User Manual

If the nEXT pump is being controlled with an Edwards TIC Turbo and Instrument
Contr
oller or TIC Turbo Controller, the TAV solenoid valve can be driven from the TIC.
Refer to the TIC Instrucon Manuals for more informaon.
7.2.4 Alternave valve connected to the vacuum system
When using another vent valve, ensure that a suitable vent restrictor is ed to the
vacuum system to limit the rate of pressure rise.
Refer to Table: Vent restrictor orice diameter if venng the vacuum system chamber for
informaon about vent restrictor sizes. If a suitable vent restrictor is not ed, open the
vent valve only aer the speed of the pump has fallen to 50% of full rotaonal speed.
Vacuum system volume (litres) Orice diameter (mm)
< 20 < 1.0
< 10 < 0.7
< 5 < 0.5
< 2 < 0.35
7.3 Operaon with parallel control and monitoring
7.3.1 Start the pump with parallel control
CAUTION:
Do not opera
te the pump with its rotor exposed. Before operang the pump it must
rst be connected to the vacuum system. If the pump is operated with its rotor
exposed, the pump rotor can cause injury as it rotates at very high speeds and the
rotang 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.
CAUTION:
When pow
er is restored following a power cut, the pump will restart automacally.
The pump must remain connected to the vacuum system to prevent risk of injury.
In parallel control the pump will accelerate to full operang speed when started.
Start the nEXT pump by linking the start/stop control input to the 0 V control reference
on the logic interface connector.
The green indicator on the motor controller will illuminate when the pump reaches
normal speed. This is 80% of full rotaonal speed by default but a dierent value may
have been selected to suit the applicaon.
08/2021 - ©Edwards Limited
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aon

Edwards nEXT730D Specifications

General

Brand	Edwards
Model	nEXT730D
Category	Water Pump
Language	English