Liebert PX018 Installer's/User's Manual page 70

8. Remove the 4 hex bolts securing the humidifier assembly to the unit, see Figure 9.4 below,
then remove the humidifier from the unit.
9. Remove the panel located behind the humidifier's previous location. This will reveal the panel
and make it accessible. See Figure 9.4 below.
Figure 9.4 Bolt and panel removal
10. Remove the smoke detector tubing from the right side; remove the air sail tubing from the left
side.
11. Remove the high and low voltage wiring supplying the fan.
12. Remove the four hex bolts securing the mounting panel to the unit. Remove only the bolts
indicated in Figure 9.4 above.
13. Slide the EC fan assembly forward and out of the unit.
14. Place the new EC fan assembly in the unit on the mounting rails that supported the old
assembly.
15. Connect all high-voltage and low-voltage wiring.
16. Secure the new assembly using the same hardware removed in step 12.
17. Reattach smoke detector and air-sail tubing removed in step 10.
18. Reinstall the panel removed in step 9.
19. Reinstall the humidifier air-blocking panel removed in step 6.
20. Reinstall the humidifier assembly and reconnect the wire harness removed in step 8.
21. Run the drain humidifier drain that was removed in step
panel. Connect to the T-connection on the left side of the unit; reconnect the humidifier's
high-limit wires to the bottom of the humidifier pan that were removed in step 5.
22. Reconnect the actuator (if present) that was removed in step 5.
23. Replace the front panel of the unit. Turn main disconnect to On. Turn unit On at display and
verify the new fan starts.
Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |
Item Description
1 Hex bolt (4 places)
2 Panel behind humidifier
4 through the humidifier air-blocking
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