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33 Liebert
®
NX
™
4.3.3 Limited Life Components
The Liebert NX 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 NX 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, Emerson 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.
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 1-800-LIEBERT. For customers using Liebert Services’ preventive maintenance,
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.
4.4 Battery Maintenance
Table 4 UPS component service life
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) 20-Year Design Life 12 to 15 years
Valve-Regulated, Lead-Acid (VRLA)
5-Year Design Life 2 to 3 years
10-Year Design Life 3 to 5 years
20-Year Design Life
8 to 12 years
Confirm need for replacement via load test or
continuous battery performance monitoring.
!
WARNING
Risk of electric shock and high short circuit current. Can cause equipment damage, personal
injury and death.
• These maintenance procedures will expose hazardous live parts. Refer servicing to properly
trained and qualified personnel working in accordance with applicable regulations as well
as with the manufacturers’ specifications.
• DC fuses operate at the rated battery voltage at all times. A blown DC bus fuse indicates a
serious problem. Serious injury or damage to the equipment can result if the fuse is
replaced without knowing why it failed. Contact Liebert Services for assistance.