Exide Technologies Section 92.80 - Manual (Page 9)

5.3 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 perfor-
mance.
Heat sources such as heaters, sunlight or associated equipment
can cause such temperature variations. Similarly, air conditioning
or outside air vents may cause cell string temperature variations.
Every effort should be made to keep temperature variations with-
in 3°C (5°F).
5.4 Ventilation
The Absolyte battery is a Valve Regulated Lead Acid (VRLA)
low maintenance design. Tests have confirmed that under rec-
ommended operating conditions in stationary applications, 99%
or more of gases generated are recombined within the cell. In
most cases, no special ventilation and or battery room is
required. Consult your local building and fire codes for require-
ments that may apply to your specific location.
Hydrogen and oxygen gases can be vented to the atmosphere
under certain conditions. Therefore, the battery should never be
installed in an air-tight enclosure. Sufficient precautions must be
taken to prevent excessive overcharge.
5.5 Floor Loading
The floor of the area where the battery system is to be installed
should have the capability of supporting the weight of the battery
as well as any auxiliary equipment. The total battery weight will
depend on the cell size, number of cells, as well as module con-
figuration involved. Consult layout/wiring diagram for the battery
system weight
Prior to installation, a determination should be
made that the floor integrity is adequate to accommodate the
battery system.
5.6 Floor Anchoring
Where seismic conditions are anticipated, floor anchoring should
be provided. Such anchoring is the responsibility of the user.
Where non-seismic conditions are anticipated, anchoring is rec-
ommended for maximum stability.
Four 9/16” (14.3 mm) holes are provided in the I-Beam for
anchoring. To maintain seismic certification, use four anchor
bolts per horizontal support. Anchor design is the responsibility
of the purchaser/installer.
5.7 Connecting Cables:
Battery System to Operating Equipment
The Absolyte cell is a UL recognized component.
Battery performance is based on the output at the battery termi-
nals. Therefore, the shortest electrical connections between the
battery system and the operating equipment results in maximum
total system performance.
DO NOT SELECT CABLE SIZE BASED ON CURRENT CAR-
RYING CAPACITY ONLY. Cable size selection should provide
no greater voltage drop between the battery system and operat-
ing equipment than necessary. Excess voltage drop will reduce
the desired support time of the battery system.
5.7.1 Paralleling
Where it is necessary to connect battery strings in parallel in
order to obtain sufficient load backup time, it is important to min-
imize the differences in voltage drop between the battery strings
in parallel in order to promote equal load sharing upon dis-
charge. Therefore, equal resistance of cable connections for
each parallel string is important.
When paralleling multiple
strings to a load or common bus, please follow these guidelines:
• Each parallel string must have the same number of cells (same
string voltage).
• The cables connecting the positive and negative terminals of
each string to the load (or bus) should be of the
same size (i.e.
same capacity/cross-sectional area).
• The cables connecting the positive and negative terminals of
each string to the load (or bus) should be of the
same length.
Choose the shortest cable length that will connect the battery
string that is furthest from the load, and cut all cables used to
connect each string to the load to this same length.
5.8 Stacking Limitations
There are recommended limits on stacked (horizontal only) bat-
tery configurations, see Table B and consult your layout/wiring
diagram.
TABLE B
Absolyte GX Stacking Limitations for the 2-Cell Tray
GX System Non-Seismic Seismic
GX2000 6 High 6 High
GX3000 6 High 6 High
GX4000 6 High 6 High
GX5000 6 High 6 High
GX6000 6 High 6 High
3-Cell GX2000 trays provide UBC Zone 4 compliance when
stacked 4 modules high and UBC Zone 1 compliance at 8 mod-
ules high.
5.9 Terminal Plates
Each system is supplied with a terminal plate assembly for the
positive and negative terminations. These should always be used
to provide proper connection to the operating equipment and cell
terminals. Any attempt to connect load cables directly to cell ter-
minal may compromise battery system performance as well as
the integrity of cell post seals.
5.10 Grounding
It is recommended that the modules or racks be grounded in
accordance with NEC and/or local codes. See Appendix C for
recommended procedure.
9