Liebert 1000kVA manual Limited Life Components

Maintenance

4.3.3Limited Life Components

Your Liebert 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 your UPS wherever practical and cost-effective. However, due to current component material and manufacturing technol- ogy limitations, a few components in your Liebert UPS will wear out and require replacement in less than 10 years.

The following limited-life components are utilized in your UPS system. To prevent a wear-out failure of one of these components affecting your critical load operations, Liebert recommends these compo- nents be periodically inspected and replaced before their expected wear-out life. Individual users may have site-specific requirements that differ from these typical life expectations.

Component	Expected Life	Replace in:
Power AC filter capacitors	> 7 years	5 to 6 years
	(~62,000 hours)
Power DC filter capacitors	> 7 years	5 to 6 years
	(~62,000 hours)
Low-profile fans	> 7 years	5 to 6 years
	(~62,000 hours)
Squirrel-cage blowers	10 years	8 to 9 years
	(~87,600 hours)
Air filters, disposable	1 to 3 years	Check four times
(see also 4.3.2 - Air Filters)		per year
Battery, lithium	10 years	8 to 9 years
Logic memory backup	(~87,600 hours)
Battery, storage
Lead-acid wet-cell	10 to 20	1 to 2 years
(user selection)	years	prior to end-of-life
Valve-regulated lead-acid	5 years	3 to 4 years
(VRLA)	10 years	6 to 8 years

Power capacitors are considered “failed” when their measured capacitance is -5% below their name- plate rating. Typically, storage batteries are “worn out” when their full-load reserve time is -20% below rated. Site-specific battery plants may have different end-of-life requirements. Fans and blow- ers typically will stop rotating or rotate slower than expected.

In most cases, replacement components must exactly match the original component specifications and 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 Global Services (LGS) Preventive Maintenance Services, periodic inspec- tion of these components is part of this service, as well as recommending replacement intervals to cus- tomers to avoid unanticipated interruptions in critical load operations.

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