Module Front Shield Assembly
1. Remove clear protective covering from the shields.
2. Attach the standoff through the shield and fasten
the nuts. (See Fig. 4-9 on pg. 5 and 4-8 on pg. 11.)
NOTE: Use the long standoff for the four corners
and the short standoffs for the center holes.
3. Insert the fully assembled shield through the holes in
the battery module until the standoff locks in place.
(See Fig. 4-8 on pg. 11, and 4-10 on pg. 5.)
Terminal Plate Shield Assembly
1. For side terminal shield assembly, refer to Fig. 4-3
on pg. 9 and 4-12 on pg. 5.
1. For top terminal shield assembly, refer to Fig. 4-4
on pg. 10 and 4-14 on pg. 5.
Module Top Shield Assembly
1. For side terminal assembly, attach the top shield to
the highest front shield. (Refer to Fig. 4-11 on pg. 12
and 4-12 on pg. 5.)
2. For top terminal assembly, cut the top shield to fit
between the terminal shields and attach it to the face
shield. (See Fig. 4-13 on pg. 12 and 4-14 on pg. 5.)
SYSTEM OPERATIONS
Float Voltages
These batteries are designed for 20-year life when
floated at 2.25 ± 1% volts per cell (VPC) at 77˚F
(25˚C) or less. The charger must be able to sustain the
system voltage within ± 1% of the desired level at all
times. The desired float voltage varies with the temper-
ature according to the table below.
Operating Temperatures
Temperature
Temperature
Per Cell Float
Degrees F
Degrees C
Voltage ± 1%
50˚
10˚
2.25
59˚
15˚
2.25
68˚ 20˚
2.25
77˚
25˚
2.25
86˚
30˚
2.25
95˚
35˚
2.23
Equalizing
Upon installation of the battery, an optional boost
charge of 2.30 VPC ± 1% 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 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 remain in excess of
95˚F (35˚C), contact East Penn for recommendations.
RECORD KEEPING
Voltages, Temperatures & Micro-Ohm
Readings
Record keeping is an important part of stationary
battery maintenance. This information will help in
establishing a life history of the battery and inform the
user if and when corrective action needs to be taken.
(Refer to Appendix C.)
While it is acceptable to operate at temperatures less
than 77˚F (25˚C), it will require longer charging time to
become fully recharged. Also the capacity will be less
at operating temperatures below 77˚F (25˚C). (See
pg. 17.)
After installation and when the batteries are on float
charge for one week, the following data should be
recorded on the sticker located closest to the positive
terminal.
1. Battery terminal voltage
2. Charger voltage
3. Individual cell voltages
4. Ambient temperatures
5. Terminal connection should be checked to verify that
the installer did torque all connections properly (100
± 5 in.-lbs.).
®
6
Fig. 6-2
Summary of Contents for Unigy II
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Page 14: ...14 Fig A 3 Fig A 4 APPENDIX A...
