Exide Technologies Section 92.30 - Manual (Page 7)

However, should the battery be subjected to excessive overcharge, hydrogen and oxygen can be
vented to the atmosphere. Therefore, the battery should NEVER BE INSTALLED IN AN AIRTIGHT
ENCLOSURE. Sufficient precautions must be taken to prevent excessive overcharge. Normal
ventilation sufficient for human occupation will be adequate to avoid hazardous conditions.
Tests have confirmed that more than 99% of gases generated are recombined within the battery.
Under normal operating conditions, no special ventilation and/or battery room is required.
MARATHON/SPRINTER/SUNLYTE batteries can be installed in close proximity to electronic equipment
only when the heat generated by this equipment is removed by ventilation.
5.2 TEMPERATURE VARIATIONS
Sources of heat or cooling directed on portions of the battery can cause temperature variations within the
strings resulting in cell voltage differences and eventual compromise of battery performance. Heat
sources, such as heaters, sunlight or associated equipment, can cause such temperature variations.
Similarly, air conditioning or outside air vents should not directly influence portions of battery string
temperatures. Every effort should be made to keep temperature variations within 3°C (5°F).
5.3 FLOOR LOADING
The area where the battery system is to be installed should have the capability to
support the weight of the battery as well as any auxiliary equipment. The total battery weight will
depend on the battery size, number of batteries, as well as the configuration involved. Prior to
installation, a determination should be made that the floor integrity is adequate to accommodate the
battery system.
5.4 FLOOR ANCHORING
Where seismic conditions are anticipated, floor anchoring should be provided. Such anchoring is the
responsibility of the user.
5.5 OPEN CIRCUIT VOLTAGE CHECK
The voltage of each unit should be checked to insure the average cell voltage is at least 2.1 volts. If
any unit has an average cell voltage lower than 2.1 volts, contact your local GNB representative for
instructions.
Example: A 6 cell (12 V nominal) battery should have an open circuit voltage of
at least 2.1 x 6 = 12.6 VDC.
A 3 cell (6 V nominal) battery should have an open circuit voltage of
at least 2.1 x 3 = 6.3 VDC.
SECTION 6 - RACK SYSTEM - INSTALLATION
6.0 PLACEMENT OF UNITS ON RACK
When installing units on a rack, start on the lower tier for stability and safety reasons. Place units on
the rack so that the positive (+) of one unit is connected to the negative (-) of the next unit. Standard
spacing is 12mm (1/2 inch) minimum between units.
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