Routine Maintenance, Record Log, Air Filters

Maintenance

4.3Routine Maintenance

You should become thoroughly familiar with the equipment, but at no time should you 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 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 have historical background.

•Keep it clean—Maintain the UPS free of dust and moisture.

•Keep it cool—Battery systems must be kept in the range of 72-77°F (22-26°C) in order to meet design specifications for capacity and longevity.

The UPS will reliably meet all performance specifications and design life at temperatures up to 104°F (40°C). However, performance and longevity will be optimized when the UPS is operated at the same temperature as the batteries. Contact your local Emerson® sales representative or call 1-800-LIEBERT for further details.

•Keep connections tight—Tighten all connections at installation and at least annually thereafter (see Table 6 - Battery retorque values.)

•Keep it inspected—Periodically inspect external upstream and downstream circuit breakers to assure that the trip current settings are correct.

Become familiar with typical ambient conditions surrounding equipment so that abnormal conditions may be more quickly recognized. Know what typical meter readings are and where adjustable settings should be.

4.3.1Record Log

Set up a maintenance log to record scheduled checks and any abnormal conditions.

The log should have space for all metered parameter indications including phase readings, alarm messages, UPS mode of operation, air filter replacement date and observation notes. A second log should be maintained for the DC source as directed by the DC source manufacturer.

A periodic walk-through inspection of the UPS and DC source rooms is advised to check for visible and audible indications of problems. Log the inspection, metered parameter indications and any discrepancies.

4.3.2Air Filters

The air filters must be inspected and serviced on a regular schedule. The period between inspections will depend upon environmental conditions. Under normal conditions, the air filters will require cleaning or replacement approximately every two months. Abnormal or dusty conditions will require more-frequent cleaning and replacement of air filters. Inspect installations in new buildings more often, then extend the inspection period as experience dictates.

All Liebert NX models have a replaceable air filter inside the front doors. These filters can be changed while the UPS is in operation.

NOTE

Service and maintenance work must be performed only by properly trained and qualified personnel and in accordance with applicable regulations as well as with manufacturers’ specifications.

Liebert®NX™