NorthStar NSB BLUE+
Batteries
900-00264-01-001 Rev A
13
connection at the load or elsewhere in the cable system so that any resulting spark does not occur
in the battery enclosure.
Once hardware is installed and batteries are properly aligned, torque all connections to the
appropriate value for the battery model. (See the requirements on page 25.) Lightly coat the
surfaces with battery terminal grease. Reinstall the terminal covers if present.
IMPORTANT:
Before using the battery bank, commission the batteries as described below.
Commissioning
The commissioning charge applies when the batteries have been in transit or in storage for 24
months or more. (This applies at a storage temperature of 25°C or 77°F. The interval is shorter
at higher temperatures.) It is also needed when the battery system is intended for use at the
minimum float charging voltage or when the number of cells in series is greater than 24. Under
any of these conditions, it is recommended that the battery system is given a freshening charge
at 2.35 volts average per cell for 16 hours. This will assure higher initial performance and will
reduce the time period required for the cells to achieve proper voltage balance between the
individual units.
To apply a freshening charge:
Confirm the freshening (equalization) voltage from the charger/rectifier is set to a value equal to the
Absorb Charging Voltage shown on page 15.
Close the circuit from the charger to the battery and confirm that the battery accepts current.
Monitor the battery periodically and note that the operation is proceeding normally. Make certain
that the current acceptance is declining and that the batteries are not overheating (within ±5°F or
±2.8°C of each other and the ambient temperature). Make certain that the individual battery
voltages on equalization charge are 14.1 ± 0.50 Vdc.
Terminate the freshening charge in the case of any extraordinary situation or after 16 hours.
NOTE:
Never charge batteries in their packaging — always unpack and position with space
between batteries before charging.
OCV Recharge Time
Depending on the state of charge of the batteries it may take some time before they reach full
state of charge. See recommended charge times below based on OCV values of the batteries:
>12.80 Vdc
3 day charge 2.27 VpC
12.6 to 12.8 Vdc
3 day charge 2.27 VpC
12.3 to 12.6 Vdc
1 day charge 2.41 VpC
12.1 to 12.3 V dc
1 day charge 2.41 VpC