Edwards nEXT730D User Manual

List of Figures
Figure
1: nEXT Model overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 2: Pumping speed curves for nEXT730D. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 3: Pumping speed curves for nEXT930D. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 4: Pumping speed curves for nEXT1230H. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 5: Dimensional drawing for nEXT730-930D. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 6: Dimensional drawing for nEXT1230H. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 7: Maximum allowed rate of pressure rise during venng: pressure against me. 30
Figure 8: Maximum relave humidity to avoid condensaon with water cooling. . . . . . . 32
Figure 9: Cooling requirements for nEXT730D/930D. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 10: Cooling requirements for nEXT1230H. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 11: Interface circuits for nEXT turbo pump controllers. . . . . . . . . . . . . . . . . . . . . . . 37
Figure 12: Conceptual diagram for mul-drop connecon using RS232 interface. . . . . . . 46
Figure 13: RS485 mul-drop connecon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 14: Valve connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 15: Typical pumping system with a nEXT pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 16: Connecons and controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Figure 17: Mounng orientaon for nEXT1230H. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Figure 18: Mounng orientaon for nEXT1230H INV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Figure 19: Controller view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 20: Power supply connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Figure 21: Logic interface connecons - parallel control. . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Figure 22: Simplied logic interface connecons - parallel control. . . . . . . . . . . . . . . . . . . 59
Figure 23: Logic interface connecons - RS232 serial control. . . . . . . . . . . . . . . . . . . . . . . . 61
Figure 24: Logic interface connecons - RS485 serial control. . . . . . . . . . . . . . . . . . . . . . . . 61
Figure 25: Logic interface connecon - mixed parallel and serial operaon. . . . . . . . . . . . 63
Figure 26: Aaching the water cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Figure 27: Serial and parallel control owchart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
08/2021 - ©Edwards Limited
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Edwards nEXT730D Specifications

General

Brand	Edwards
Model	nEXT730D
Category	Water Pump
Language	English