Deka unigy - System Operation; System Voltage and Temperature; Equalizing Charge; Periodic Maintenance

7. When paralleling valve-regulated batteries, the capacity,
arrangement and external circuit length should be
identical for each battery string because a wide variation
in battery circuit resistance can result in unbalanced
charging (i.e., excessive charging currents in some
batteries, and undercharging in others). As a conse-
quence, a single battery failure in one battery string
and the subsequent loss of performance capabilities
of that string, will result in higher loads in the other
parallel string(s), which may exceed the ratings of the
battery connections. This can damage the battery
system and dramatically shorten battery life.
SYSTEM
OPERATION
These batteries are designed for continuous float
application. The charger must be able to sustain the
system voltage within ± .01 volts per cell of the desired
level at all times. The desired float voltage varies with
temperature according to the table below.
Equalizing
Upon installation of the high rate battery series, an
optional boost charge of 13.80 volts ± .06 volts for a
maximum of 24 hours can be applied.
If this is done, be sure to reset the charging equipment
to the proper float voltage. The average battery
operating temperature should not exceed 95°F (35°C)
and should never exceed 105°F (40.5°C) for more than
an eight-hour period.
Operating at temperatures greater than 77°F (25°C)
will reduce the operating life of the battery. If operating
temperatures are expected to be in excess of 95°F
(35°C), contact East Penn for recommendations.
Battery Battery
High Rate
Temperature Temperature Per Battery Float Voltage
Degrees F Degrees C ± .06 volts
50° . . . . . . . . 10° . . . . . . . . . . . . . . . . . 13.50
59° . . . . . . . . 15° . . . . . . . . . . . . . . . . . 13.50
68° . . . . . . . . 20° . . . . . . . . . . . . . . . . . 13.50
77° . . . . . . . . 25° . . . . . . . . . . . . . . . . . 13.50
86° . . . . . . . . 30° . . . . . . . . . . . . . . . . . 13.50
95° . . . . . . . . 35° . . . . . . . . . . . . . . . . . 13.38
PERIODIC
MAINTENANCE
(Always wear eye protection;
keep sparks and flames away.)
Annual Inspection
1. Conduct a visual inspection of the battery(ies).
2. Record the battery string voltage.
3. Record the charger voltage.
4. Record the individual battery voltages.
Batteries should be within ± 0.18 volts of float voltage.
5. Record the ambient temperatures.
6. Record all inter-battery and terminal connections.
Micro-ohm readings should be taken during this
inspection. If any reading differs by more than 20%
from the inital reading taken, retorque the connection
to 60 ± 5 inch-pounds. Recheck the micro-ohm reading.
If the reading remains high, clean the contact surfaces
according to Step 2 under Battery Assembly.
Capacity Testing
Capacity tests may be run if operation is questionable.
Do not discharge the batteries beyond the specified
final voltage. Record all findings.
Should it be determined that any individual battery
need be replaced, contact your nearest Unigy I agent
or East Penn Service Center.
BATTERIES
AND RELATED PARTS
CONTAIN LEAD
California Proposition 65 Workplace Warning Sign 1/99
Must be posted in workplace near batteries.
WASH HANDS
AFTER HANDLING !
CALIFORNIA PROPOSITION 65 WARNING:
Battery posts, terminals and related accessories
contain lead and lead compounds, and other
chemicals known to the State of California to cause
cancer and birth defects or other reproductive harm.