Edwards nEXT 240D User Manual

B800-00-880 Issue D
Page ii © Edwards Limited 2013. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Contents
3.7.1 Connect the serial interface to the customer control equipment ..............................................36
3.7.2 Serial Enable .............................................................................................................39
3.7.3 Serial protocol ...........................................................................................................39
3.7.4 Message structure .......................................................................................................41
3.7.5 Command set ............................................................................................................42
3.7.6 multi-drop operation ...................................................................................................46
3.8 Connection for mixed parallel and serial operation ...............................................................46
3.9 Vent valve selection, connection and control ......................................................................46
3.9.1 Manual vent valve ......................................................................................................47
3.9.2 TAV5 or TAV6 solenoid vent valve ....................................................................................47
3.9.3 Vent valve control ......................................................................................................47
3.9.4 Alternative valve connected to the vacuum system ..............................................................48
3.10 Cooling ................................................................................................................... 49
3.10.1 Introduction .............................................................................................................49
3.10.2 Forced air cooling .......................................................................................................49
3.10.3 Water cooling ............................................................................................................49
4 Operation ........................................................................................ 51
4.1 Configuring the nEXT pump using serial commands ...............................................................51
4.1.1 Power limit setting .....................................................................................................51
4.1.2 Powering a fan from the Controller ..................................................................................52
4.1.3 Controlled venting options ............................................................................................52
4.1.4 Standby speed setting ..................................................................................................53
4.1.5 Normal speed setting ...................................................................................................53
4.1.6 Timer setting and options .............................................................................................54
4.1.7 Analogue signal options ................................................................................................55
4.1.8 Factory settings .........................................................................................................55
4.1.9 Assigning a multi-drop address .......................................................................................55
4.2 Configuring the nEXT pump using a TIC .............................................................................56
4.3 Before starting the pump ..............................................................................................57
4.3.1 Close the vent valve ....................................................................................................57
4.3.2 Pre-start checks .........................................................................................................57
4.4 Operation with parallel control and monitoring ................................................................... 58
4.4.1 Start the pump ..........................................................................................................58
4.4.2 Running at standby speed .............................................................................................58
4.4.3 Stop the pump ...........................................................................................................58
4.4.4 Parallel monitoring .....................................................................................................58
4.5 Operation with serial control and monitoring ......................................................................58
4.5.1 Delayed start ............................................................................................................58
4.5.2 Start the pump ..........................................................................................................59
4.5.3 Standby speed ...........................................................................................................59
4.5.4 Stop the pump ...........................................................................................................59
4.5.5 Temperature readings .................................................................................................59
4.5.6 Link parameter readings ...............................................................................................60
4.5.7 Measured motor speed .................................................................................................60
4.6 Mixed parallel and serial operation ..................................................................................60
4.7 Operation with a TIC ...................................................................................................62
4.8 Decelerating and venting ..............................................................................................62
4.9 Operation at extreme conditions .....................................................................................63
4.9.1 Operation with high inlet pressure ...................................................................................63
4.9.2 Operation at high temperatures ......................................................................................63
4.9.3 Protection against over-speed ........................................................................................63
4.9.4 Electrical supply failure ...............................................................................................63
4.10 Bakeout ...................................................................................................................64
5 Maintenance ..................................................................................... 67
5.1 Introduction .............................................................................................................67
5.2 Bearing and oil cartidge maintenance ...............................................................................67
5.3 Rotor life .................................................................................................................67

Edwards nEXT 240D Specifications

General

Brand	Edwards
Model	nEXT 240D
Category	Water Pump
Language	English