A533-23-880 Issue C
Page 4
© Edwards Limited 2009. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
INTRODUCTION
the cooling purge flow when the dilution purge is switched off or the inlet-purge is switched on. Variable restrictors
(10 to 14 and 18) limit the purge flow rates.
A pressure transducer (21) monitors the pressure of the shaft-seals purge flow, and another pressure-transducer (7)
monitors the pressure in the exhaust pipeline. The outputs of the pressure transducers are used to display the shaft-
seals purge and exhaust pressures on the Pump Display Terminal.
If there is a pressure rise in the exhaust pipeline, the outputs of the pressure transducer (7) will cause the iF system
to be shut down at the appropriate alarm pressure.
The front panel has three pressure status LEDs (Figure 6, items 3, 5 and 6). These LEDs indicate whether the nitrogen
supply pressure is too high, too low or is in the acceptable range, refer to Section 5.6.
Figure 1 - The iF system (iF1800 shown without panelwork)
1. Inlet
2. HMB oil filler plug
3. Inverter
4. HMB pump-motor
5. HMB oil-level sight-glass
6. Not used
7. FDP pump-motor
8. FDP oil filler-plug
9. Levelling-foot
10. Castor
11. FDP oil-level sight-glass
12. FDP pump
13. Nitrogen pressure regulator
14. Pump display terminal
15. Emergency stop switch
16. HMB pump
17. Outlet
18. Check-valve
19. Exhaust-silencer
20. Elbow
21. NW40 trapped ’O’ ring
22. NW40 clamping ring
23. Not Used
24. Not used
25. Not Used
26. Exhaust enclosure
27. Drip tray
28. Anchor bracket
29. Control module
30. HMB cooling water Solenoid
valve
31. FDP Oil Drain Plug
