Maintenance
Liebert
®
APM
™
124
12.2 Limited Life Components
The Liebert APM 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.
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 Emerson Network Power 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.
12.3 Routine Maintenance
Become thoroughly familiar with the equipment, but at no time go beyond the specific procedures in
this manual while performing maintenance or correcting a malfunction. If you have any doubt as to
what must be done, call Emerson
®
Network Power Liebert Services at 1-800-LIEBERT for further
instructions. The UPS is designed for unattended operation, but does require some common sense
maintenance.
• Keep good records—Troubleshooting is easier if you maintain historical service records.
• Keep the UPS free of dust and any moisture.
• Keep the UPS cool:
• Battery systems must be kept in the range of 72-77°F (22-25°C) in order to meet design speci-
fications for capacity and longevity.
• The UPS will reliably meet all performance specifications at temperatures up to 104°F (40°C),
and can be slightly derated for operation at even higher temperatures. However, performance
and longevity will be optimized when the UPS is operated at the same temperature as the
batteries.
• Keep connections tight.
• Tighten all connections at installation and at least annually thereafter. (See
12.3.1 Record Log
Set up a maintenance log to record scheduled checks and any abnormal conditions.
The log should have space for all metered data including phase readings, alarm messages, UPS mode
of operation, air filter replacement date, and observation notes. A second log should be maintained for
the battery module as directed by the battery manufacturer.
Emerson recommends a periodic walk-through inspection of the UPS and battery rooms to check for
visible and audible indications of problems. Log the inspection, metered parameter indications and
any discrepancies.
Table 51
Component service life
Component
Expected Life
Replace in:
Air filters
5 years
Check four times per year
Valve-regulated, lead-acid (VRLA)
10 years
6 to 8 years
