Emerson 250-400kVA manual Battery Maintenance, Limited Life Components, UPS component service life

Maintenance

3.3.3Limited 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, manufactur- ing 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 criti- cal 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.

Table 1 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	10 years (~87,600 hours)	8 to 9 years
backup
Battery, storage
Lead-acid wet-cell (user selection)	10 to 20 years	1 to 2 years before end-of-life
Valve-regulated, lead-acid (VRLA)	5 years	3 to 4 years
	10 years	6 to 8 years

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 ser- vices, periodic inspection of these components is part of this service, as well as recommending compo- nent replacement intervals to customers to avoid unanticipated interruptions in critical load operations.

3.4Battery Maintenance

! WARNING

Risk of electrical 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 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.

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