Edwards nEXT400 - Page 108

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Table of Contents3
Safety and Compliance8
Definition of Warnings and Cautions8
Safety Symbols9
Trained Personnel9
Introduction11
Overview11
Pump Model Description12
Pump Controller12
Figure 1 Pump Model Description12
Operational Features13
Power Limit Setting13
Standby Speed13
Timer14
Analogue Output14
Automatic Vent Options15
Normal Speed Setting15
Logic Interface15
Parallel Control and Monitoring16
Serial Control and Monitoring16
Serial Control with Parallel Monitoring16
Parallel Control with Serial Monitoring or Serial Configuration17
Controller Configuration (Serial Configuration)17
Technical Data18
General Technical Data18
Figure 2 Next240 Performance Curve22
Figure 3 Next300 Performance Curve23
Figure 4 Next400 Performance Curve23
Figure 5 Next 240 Dimensions (MM)24
Figure 6 Next 300 Dimensions (MM)25
Figure 7 Next 400 Dimensions (MM)26
Operation and Storage Environment27
Vent Gas Specification and Vent Control Data27
Purge Gas Specification28
Cooling Water28
Figure 8: Max Allowed Rate of Pressure Rise During Venting: Pressure against Time28
Electrical Data29
Pumping Media29
Materials Exposed to Gases Pumped31
Logic Interface Connector31
Controller Connector Socket34
Figure 9 Interface Circuits for Next Turbo Pump Controllers34
Indicator Led's35
Figure 10 Controller Connector Showing Pin Numbers35
Installation37
Unpack and Inspect37
Typical Installation38
Connect to the Vacuum System38
Inlet Screen (Installed on CF Only)39
Figure 11 Typical Pumping System with a Next Pump39
Mechanical Fixing40
Inlet Connection and Orientation41
Figure 12 Installation Orientation41
Base Mounting42
Backing Port Connection42
Interstage Connection (Variants Only)43
Purge Gas Connection43
Recommended Purge Gas Flow43
Connect the Purge Gas43
Electrical Installation43
Ground the Connections44
Connect the Logic Interface to the TIC44
Connect the Logic Interface to the Customer Control Equipment44
Connect the Electrical Supply45
Connect the Parallel Control and Monitoring46
Figure 13 Logic Interface Connections - Parallel Control46
Connection for Serial Control and Monitoring47
Connect the Serial Interface to the Customer Control Equipment47
Figure 14 Controller Status Information48
Serial Enable49
Figure 15 Logic Interface Connections - RS232 Serial Control49
Figure 16 Logic Interface Connections - RS485 Serial Control49
Serial Protocol50
Figure 17 Conceptual Diagram for Multi-Drop Connection Using RS232 Interface51
Message Structure52
Command Set52
Figure 18 RS485 Multi-Drop Connection52
Multi-Drop Operation55
Connection for Mixed Parallel and Serial Operation56
Vent Options, Vent Valve Connection and Control57
Figure 19 Logic Interface Connection - Mixed Parallel and Serial Operation57
Manual Vent Valve58
TAV5 or TAV6 Solenoid Vent Valve58
Vent Valve Control59
Alternative Valve Connected to the Vacuum System60
Cooling60
Introduction60
Forced Air Cooling61
Water Cooling61
Figure 20 Maximum Relative Humidity to Avoid Condensation with Water Cooling62
Configuration63
Configure the Pump Using Serial Commands63
Power Limit Setting63
Power Supply to the Fan from the Controller64
Controlled Venting Options64
Standby Speed Setting65
Normal Speed Setting65
Timer Setting and Options66
Analogue Signal Options67
Factory Settings67
Assigning a Multi-Drop Address67
Configuring the Next Pump Using a TIC68
Operation70
Before Starting the Pump70
Close the Vent Valve70
Pre-Start Sequence70
Operation with Parallel Control and Monitoring71
Start the Pump71
Running at Standby Speed71
Stop the Pump71
Parallel Monitoring71
Operation with Serial Control and Monitoring71
Delayed Start71
Start the Pump72
Standby Speed72
Stop the Pump72
Temperature Readings73
Link Parameter Readings73
Measured Motor Speed73
Mixed Parallel and Serial Operation74
Operation with a TIC75
Decelerating and Venting75
Figure 21 Serial and Parallel Control Flowchart75
Operation at Extreme Conditions76
Operation with High Inlet Pressure76
Operation at High Temperatures76
Protection against Over-Speed76
Electrical Supply Failure77
Bakeout77
Maintenance80
Introduction80
Bearing and Oil Cartridge Maintenance80
Rotor Life80
Clean the External Surfaces of the Pump81
Fault Finding82
Flashing Service Codes85
Decoding Service Status Words86
Controller Run Time87
Pump Run Time87
Pump Cycles87
Bearing Run Time88
Oil Cartridge Run Time88
Flashing Error Codes88
Decoding System Status Words89
Useful Service Information91
Storage93
Disposal94
Service95
Return the Equipment or Components for Service95
Bearing and Oil Cartridge On-Site Maintenance96
Spares97
ISX Inlet Screen97
Inlet Strainer97
Inlet-Flange Seals and Integrated Inlet Screens97
NW16 and NW25 Ports98
Accessories99
Installation99
Figure 22 Next Exploded Accessories View99
ACX Air Cooler100
Figure 23 Next Exploded Accessories View100
WCX Water Cooler101
BX Bakeout Band101
TAV Vent Valve and Vent Port Adaptor101
VRX Vent Restrictor101
Vent Port Adaptor102
PRX Purge Restrictor102
C-Clamp Adaptor Kit102
Interface Cable103
TIC PC Program103

Edwards nEXT400 - Page 108

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