Exide Technologies Section 92.61 - Manual (Page 8)

Annual Average Maximum Percent
Battery Battery Reduction
Temperature Temperature In Battery Life
77°F (25°C) 122°F (50°C) 0%
86°F (30°C) 122°F (50°C) 30%
95°F (35°C) 122°F (50°C) 50%
104°F (40°C) 122°F (50°C) 66%
113°F (45°C) 122°F (50°C) 75%
122°F (50°C) 122°F (50°C) 83%
For example: If a battery has a design life of 20 years at 77°F
(25°C), but the actual annual average battery temperature is
95°F (35°C), the projected service life of the battery is calcu-
lated to be only 10 years.
Temperature records shall be maintained by the user in accor-
dance with the maintanence schedule published in this manual.
The battery temperature shall not be allowed to exceed the
maximum temperature shown above. It is important to maintain
the battery temperature as close to 77°F (25°C) as possible to
achieve the optimum service life from your battery.
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
performance.
Heat sources such as heaters, sunlight or associated equipment
can cause such temperature variations. Similarly, air condition-
ing or outside air vents may cause cell string temperature varia-
tions. Every effort should be made to keep temperature varia-
tions within 5°F (3°C).
5.4 Ventilation
The Absolyte battery is a Valve Regulated Lead Acid (VRLA)
low maintenance design. Tests have confirmed that under
recommended 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
requirements 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 configuration involved. Prior to installa-
tion, 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
must be implemented.
Where non-seismic conditions are anticipated, anchoring of hori-
zontally stacked systems is recommended for maximum stability.
Four 9/16” (14.3 mm) holes are provided in each I-Beam
support 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 terminals.
Therefore, the shortest electrical connections between the
battery system and the operating equipment results in maxi-
mum total system performance.
DO NOT SELECT CABLE SIZE BASED ON CURRENT
CARRYING CAPACITY ONLY. Cable size selection should
provide no greater voltage drop between the battery system
and operating 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
minimize the difference in voltage drop between the battery
strings in parallel in order to promote equal load sharing upon
discharge. 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 battery configura-
tions. Please refer to Appendix D for additional information.
NOTE: Horizontal module arrangement only.
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 equip-
ment and cell terminals. Any attempt to connect load cables
directly to cell terminal may compromise battery system per-
formance 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.
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