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Maintenance 113
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 manufactu rer’s manual.
Valve-regulated lead-acid (sealed-top) batteries do require periodic maintenance. Though they do not require
maintenance of electrolyte levels, battery voltage and connection resistance checks should be made.
Since 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.
The equalizing charge time period is adjustable from zero to 72 hours and can be initiated automatically or man-
ually. Refer to 3.0 - Operation.
NOTE
Do not use equalize charging with valve-regulated lead-acid batteries.
Consult the battery manufacturer's manual for specific information about equalize
charging.
Battery Voltage Record
Dat e
Float Voltage
(Volts DC)
Nominal Voltage
(Volts DC)
Ambient Temp.
(°F)
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* To be completed by Liebert Customer Service Representative at time of start-up.
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