Edwards nEXT240, Instruction Manual

Page: 4 / 81

B800-00-880 Issue A
Page ii © Edwards Limited 2009. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Contents
3.7.1 Connect the serial interface to your control equipment .........................................................32
3.7.2 Serial enable .............................................................................................................34
3.7.3 Serial protocol ...........................................................................................................35
3.7.4 Message structure .......................................................................................................36
3.7.5 Command set ............................................................................................................37
3.7.6 Simultaneous parallel and serial operation .........................................................................39
3.7.7 Multi-drop operation ...................................................................................................40
3.8 Vent options, vent valve connection and control ..................................................................40
3.8.1 Manual vent valve ......................................................................................................40
3.8.2 TAV5 or TAV6 solenoid vent valve ....................................................................................40
3.8.3 Controlled venting ......................................................................................................41
3.8.4 Alternative valve connected to the vacuum system ..............................................................42
3.9 Cooling ...................................................................................................................42
3.9.1 Introduction ............................................................................................................. 42
3.9.2 Forced air cooling ....................................................................................................... 42
3.9.3 Water-cooling ...........................................................................................................43
4 Operation ........................................................................................ 45
4.1 Configuring the nEXT pump using serial commands ...............................................................45
4.1.1 Power limit setting .....................................................................................................45
4.1.2 Powering a fan from the Controller ..................................................................................46
4.1.3 Controlled venting options ............................................................................................46
4.1.4 Standby speed setting ..................................................................................................47
4.1.5 Normal speed setting ...................................................................................................47
4.1.6 Timer setting and options .............................................................................................48
4.1.7 Analogue signal options ................................................................................................49
4.1.8 Factory settings ......................................................................................................... 49
4.1.9 Assigning a multi-drop address .......................................................................................49
4.2 Configuring the nEXT pump using a TIC .............................................................................50
4.3 Start-up ..................................................................................................................51
4.3.1 Close the vent valve ....................................................................................................51
4.3.2 Pre-start checks ......................................................................................................... 51
4.4 Operation with parallel control and monitoring ...................................................................52
4.4.1 Start the pump ..........................................................................................................52
4.4.2 Running at standby speed .............................................................................................52
4.4.3 Stop the pump ...........................................................................................................52
4.4.4 Parallel monitoring .....................................................................................................52
4.5 Operation with serial control and monitoring ......................................................................52
4.5.1 Delayed start ............................................................................................................ 52
4.5.2 Start the pump ..........................................................................................................53
4.5.3 Standby speed ...........................................................................................................53
4.5.4 Stop the pump ...........................................................................................................53
4.5.5 Temperature readings .................................................................................................53
4.5.6 Link parameter readings ...............................................................................................54
4.5.7 Measured motor speed .................................................................................................54
4.6 Simultaneous parallel and serial operation .........................................................................54
4.7 Operation with a TIC ...................................................................................................54
4.8 Decelerating and venting ..............................................................................................54
4.9 Operation at extreme conditions .....................................................................................55
4.9.1 Operation with high inlet pressure ...................................................................................55
4.9.2 Operation at high temperatures ......................................................................................55
4.9.3 Operation at over-speed ...............................................................................................55
4.9.4 Electrical supply failure ...............................................................................................55
4.10 Bakeout ................................................................................................................... 56
5 Maintenance ..................................................................................... 59
5.1 Introduction .............................................................................................................59
5.2 Bearing and oil cartidge maintenance ...............................................................................59
5.3 Rotor life ................................................................................................................. 59