Emerson Liebert NX 50 and 60 Hz - Manual (Page 121)

Options—For Assembly Inside the UPS Cabinet
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9.1.7 Replacing Dust Filters
Installing the two dust filters in the Liebert NX requires only a Phillips screwdriver. Each filter is
held in place by a bracket on either side of each filter. To install each filter:
1. Open the UPS door and locate the filters on the back side of the front door (see Figure 75).
2. Remove one bracket and loosen the screw on the second bracket. The second bracket need not be
removed (see Figure 75).
3. Remove the dust filter to be replaced.
4. Insert the clean filter.
5. Reinstall the bracket, tightening the screw securely.
6. Tighten the screw on the second bracket.
Figure 75 Replacing the dust filters
9.1.8 Redundant Fan for Power Module
In addition to the monitored fans installed in the UPS cabinet to ensure sufficient cooling power at
various operation modes with 100% rated load, a redundant power module fan set can be supplied,
thus ensuring continuity of UPS operation even with the failure of some fans. No extra footprint is
required.
Bracket Sems screw
Bracket