Vertiv Liebert EXM2 - Life Parameters and the Proposed Replacement Time of Key Components; Replacement of Air Filter

11.3.1 Life Parameters and the Proposed Replacement Time of Key Components
Key components in Table 11.1 below are used in the UPS system. To prevent system failures due to some of the devices'
failure by wear, it is proposed to carry out regular inspection and replacement during its estimated life.
Key co m po nen ts Estim ated life P rop ose d rep lacement tim e Pro posed inspectio n period
Fan Not less than seven years Six years One year
Bus capacitor Not less than seven years Six years /
Air filter One year to three years One year to two years Two months
VRLA battery (5-year life) Five years Three year to four years Six months
VRLA battery (10-year life) Ten years Six years to eight years Six months
Table 11.1 Life p arameters and the prop osed replacement tim e of key com ponents
11.3.2 Replacement of Air Filter
The air filters need regular inspection and replacement. The inspection and replacement intervals are related to the
environmental conditions of the UPS. Under normal environmental conditions, the air filters should be cleaned or replaced
once every two months and need more frequent cleaning and replacement in dusty or other harsh environments. Frequent
inspection or replacement should also be made in new buildings.
The UPS provides air filters on the back of the front door of the cabinet, and the user can replace the air filter during the UPS
operation.
Each air filter is fixed by a fixing bar on both sides. Refer to Figure 11.3 on the facing page, the following is the air filter
replacement procedures:
1. Open the front door of the UPS to reveal the air filter on the back of the front door.
2. Remove a fixing bar on one side and loosen the fixing screws of the fixing bar on the other side, with no need to
remove this fixing bar.
3. Remove the air filter to be replaced, and insert a clean one.
4. Re-install the removed fixing bar in the original place and tighten the fixing screws.
5. Tighten the fixing screws of the fixing bar on the other side.
11 Service and Maintenance
180
Vertiv™ Liebert® EXM2 UPS User Manual