Emerson Liebert NXL series Operation And Maintenance Manual page 62

Liebert NXL UPS
• After replacing battery jars in a battery cabinet, replace the retaining straps that hold the
jars in place on the shelves. This will limit accidental movement of the jars and connectors
should the cabinet ever need to be repositioned or relocated.
Regular maintenance of the battery module is an absolute necessity. Periodic inspections of
battery and terminal voltages, specific gravity and connection resistance should be made.
Strictly follow the procedures outlined in the battery manufacturer's manual, available on
the manufacturer's Web site.
Valve-regulated lead-acid (sealed-cell) batteries do require periodic maintenance. Although
maintenance of electrolyte levels is not required, visual inspections and checks of battery
voltage and connection resistance should be made.
Risk of equipment damage. Batteries should be cleaned with a dry cloth or a cloth lightly
moistened with water. Do not use cleaners on the batteries. Solvents can make the battery
cases brittle.
Because individual battery characteristics are not identical and may change over time, the
UPS module is equipped with circuitry to equalize battery cell voltages. This circuit
increases charging voltage to maintain flooded type battery cells at full capacity.
Risk of electric shock, explosive reaction, hazardous chemicals and fire. Can cause
equipment damage, personal injury and death.
Do not use equalize charging with valve-regulated, lead-acid batteries. Refer to the battery
manufacturer's manual, available on the manufacturer's Web site, for specific information
about equalize charging.
Page 62
Operation and Maintenance Manual
NOTICE NOTICE NOTICE NOTICE
WARNING
250-300-400-800kVA