Instruction Manual

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Doc. #: 0260011-J0 Rev B
• A disconnect switch shall be provided by others for the AC input and AC output circuits.
• Risk of Electric Shock and Fire Hazard: replace fuse with the same type and rating.
1.3 External Battery Safety
• The power system requires an over-current protection device for the external batteries. The
maximum allowable current is typically 450A but can be less depending on the model. Follow
the local electrical codes.
• Ensure that the external battery connection is equipped with a disconnect.
• If the batteries are stored for extended periods before the installation, charge the batteries at
least once every three months to ensure optimum performance and maximum battery service
life.
• Refer to the battery manufacturer’s recommendation to select the correct float and equalize
charge voltage settings. Failure to do so can damage the batteries. Verify that the battery char-
ger’s float and equalize settings are correct.
• The batteries are temperature sensitive. During extremely cold conditions, a battery’s charge
acceptance is reduced and requires a higher charge voltage. During extremely hot conditions,
a battery’s charge acceptance is increased and requires a lower charge voltage. To allow for
changes in temperature, the battery charger must be equipped with a temperature compensat-
ing system. For 3i+1R shelf systems, refer to the rectifier manual for information about tempera-
ture compensation.
• If the batteries appear to be overcharged or undercharged, first check for defective batteries
and then verify that the charger voltage settings are correct.
• To ensure optimal performance, inspect the batteries according to the battery manufacturers
recommendations. Check for signs of cracking, leaking, or unusual swelling. Some swelling is
normal.
• Check the battery terminals and connecting wires. Periodically clean the battery terminal con-
nectors and retighten them to the battery manufacturer's torque specifications. Spray the termi-
nals with an approved battery terminal coating such as NCP-2 or No-Ox.
• Verify that the polarity of the cables are correct before connecting the batteries to the power
module. The polarity is clearly marked on the batteries. The battery breaker will trip and the recti-
fiers may be damaged if the cables are connected with the wrong polarity.
1.4 Utility Power Connection
Connecting to the utility must be performed by qualified service personnel only and must comply
with local electrical codes. The utility power connection must be approved by the local utility before
the installation.