Infrared Humidifier Maintenance; Cleaning Humidifier Pan And Float Switch - Liebert PX018 Installer's/User's Manual

8. With the mounting plate lowered, remove the fan from the unit by sliding it forward on the rails
as shown in Figure 9.7 below. Take note of how the fan slid from the unit.
9. A service loop has been added to the wire harness, cut the wire ties to loosen.
Figure 9.7 Slide the fan assembly out the front of the unit
10. Slide the new fan assembly into place along the guide rails until it is in the correct position.
11. Re-install the bolts that were removed in step
12. Tight the bolts that were loosened in step
13. Close the unit and re-install any panels that were removed.
14. Turn main electrical disconnect to On, turn the unit On at the iCOM display.
15. Place the unit into a call for cooling and verify that the new fan starts.

9.3 Infrared Humidifier Maintenance

During normal humidifier operation, deposits of mineral solids will collect in humidifier pan and on the float
switch. These must be cleaned periodically to ensure proper operation. Frequency of cleaning must be
locally established since it is dependent on humidifier usage and local water quality. A spare pan is
recommended to reduce maintenance time at unit. The Liebert autoflush system can greatly increase the
time between cleanings, but does not eliminate the need for periodic checks and maintenance (see
Liebert iCOM™ user manual SL-18841 for autoflush setup). To help reduce excessive scaling in locations
with difficult water quality, the use of Vapure™ is recommended (contact your local sales representative).
CAUTION: Risk of contact with extremely hot water and part surfaces. Can cause burn injury.
The infrared humidifier bulbs, metal enclosure, humidifier water, water reservoir pan and drain
tubing are very hot during and shortly after operation. Allow sufficient time for these parts to
cool to a touch-safe temperature before handling. Use extreme caution, and wear appropriate,
OSHA-approved PPE when performing maintenance on the infrared humidifier.

9.3.1 Cleaning Humidifier Pan and Float Switch

Before turning the unit Off:
1. With unit operating, remove call for humidification at the Liebert iCOM control.
2. Let the blower operate 5 minutes to allow the humidifier and water to cool.
3. If unit has a condensate pump, turn unit OFF at Liebert iCOM control.
4. Pull out the humidifier standpipe in pan.
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5 to secure the fan assembly to the unit.
7 to raise the mounting plate back into position.
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