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Liebert NXL UPS
Operation and Maintenance Manual
250-300-400-800kVA
Page 60
3.3.3
Limited Life Components
The Liebert NXL UPS has a design life well in excess of 10 years. Well-maintained units
can continue to provide economic benefits for 20 years or more. Long-life components are
used in the UPS wherever practical and cost-effective. However, due to the currently
available component material, manufacturing technology limitations and the general
function and use of the component, a few components in your Liebert UPS will have a
shorter life cycle and require replacement in less than 10 years.
The following components utilized in your UPS system have a limited life cycle and are
specifically exempt from warranty. To prevent a wear-out failure of one of these
components affecting your critical load operations, Liebert recommends these components
be periodically inspected and replaced before the expected expiration of their life cycle. The
expected life of each component listed below is simply an estimate and is not a guarantee.
Individual users may have site-specific requirements, maintenance and other
environmental conditions that affect the length of the component's useful life cycle.
Component
Expected Life
Replace in:
Power AC filter capacitors
> 7 years (~62,000 hours)
5 to 6 years
Power DC filter capacitors
> 7 years (~62,000 hours)
5 to 6 years
Low-profile fans
> 7 years (~62,000 hours)
5 to 6 years
Air filters
1 to 3 years
Check four times per year
Battery, lithium logic memory
backup
10 years (~87,600 hours)
8 to 9 years
Battery, storage
Lead-acid wet-cell (user
selection)
10 to 20 years
1 to 2 years before end-of-life
5 years
3 to 4 years
Valve-regulated, lead-acid
(VRLA)
10 years
6 to 8 years
Table 1:
UPS component service life
In most cases, replacement components must exactly match the original component
specifications.
These replacement components are not readily available from third-party component
distributors.
For assistance with your specific component specifications, replacement component
selection and sourcing, call Global Service Support. For customers using Liebert Services’
preventive maintenance services, periodic inspection of these components is part of this
service, as well as recommending component replacement intervals to customers to avoid
unanticipated interruptions in critical load operations.
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