VRLA Installation, Operation & Maintenance Manual
4 Subject to revision without prior notice. E.&.O.E V2.3
Two other factors are relevant when discussing battery
discharges. First, batteries must not be left in a
discharged state, and must be charged immediately after
a discharge. Second,
MPINarada battery discharge rates are given for a
reference temperature of 77°F (25°C). At temperatures
above the reference the capacity increases at the
expense of life, while at temperatures below the reference
capacity diminishes and extends battery life. Please refer
to industry standard IEEE 1188 for more information on
the effect of temperature on battery capacity.
7.
Maintenance and record keeping
MPINarada VRLA batteries do not require periodic
watering. However, for optimum life and performance they
must be kept clean; cleaning should be done with only a
damp cloth, avoiding the use of any organic solvents.
Below are the recommended maintenance procedures.
Monthly maintenance (Recommended)
Keep battery room /site clean.
Check each battery for cleanliness and look
for signs of damage due to overheating,
particularly at and around the terminals and
on the cables.
Record battery room /cabinet ambient
temperature.
Measure and record the total string float
voltage and float charge current at the
closest point to the battery or battery string
termination. The string voltage should read
(
N × Recommended float voltage
), where
N
is the number of cells in the series string.
Quarterly maintenance (Recommended)
Perform monthly maintenance procedures
Measure and record voltage of each
individual on-line battery/cell of the string. If
more than two cells or batteries vary by
more than 0.10 VPC (13V and 6.5V for a 12V
and 6V battery, respectively) equalize the
string as noted in the Section 4 on
equalizing charge. If the problem exists the
batteries may be given the yearly
maintenance noted below.
Annual maintenance (Required)
Perform quarterly maintenance procedures
Check all connections for looseness and
retorque them as necessary.
Conduct a load test to 30-40% depth of
discharge (DOD), or perform an
impedance /conductance /resistance test
to verify battery change from Baseline or
Reference.
3-year maintenance (Recommended)
Perform quarterly maintenance procedures
Check all connections for looseness and
retorque them as necessary.
Conduct a load test to 80% DOD or perform
an impedance/conductance /resistance
test to verify battery system capacity.
All of the records should be carefully kept in a logbook as
MPINarada will require all maintenance records in the event of
a warranty claim. The logbook should also record any unusual
activity such as power outages, rectifier/UPS alarms, etc.
After sales service
North America:
MPINarada
44 Oak Street, Newton, MA 02464
Tel: 800-982-4339
www.mpinarada.com
[email protected]
China:
NARADA POWER SOURCE CO.,LTD.
No.459 Wensan Road, Hangzhou, Zhejiang, P.R.China
Tel:+86-571-28827013 Fax:+86-571-85126942
www.en.naradapower.com
[email protected]
