40 Issue 3.3.2 / April, 2011
Charging the Battery
The rechargeable batteries are automatically charged when the KSU is plugged in.
When System is in a full-load condition (eight CO Trunks and twenty-four Extensions all in use), the
batteries provide a minimum of 1 hour's consecutive use. Change the batteries every two years.
Installing or Replacing Batteries
Caution
To Reduce the Risk of Fire or Injury to persons, Read and Follow these Instructions.
1. Use only the following type and size batteries:
12 Volt 6.5 Amp/Hour "Gel-Cell" sealed batteries (2).
Dimensions, approximately 3 1/4" (H), 5 15/16" (W), 2 1/2" (D).
Power Sonic model PS660 or equivalent.
2. Do not dispose of the batteries in a fire. The cell may explode.
Check with local codes for possible special disposal instructions.
3. Do not open or mutilate the batteries. Released electrolyte is corrosive and
may cause damage to the eyes or skin. It may be toxic if swallowed.
4. Exercise care in handling batteries in order not to short the battery with
conducting materials such as rings, bracelets, and keys. The battery or conductor may overheat
and cause burns.
This product is defined as a secondary battery operated device. As such, the following
instructions should also be read and followed:
1. Charge the batteries provided with or identified for use with this product only in accordance with the
instructions and limitations specified in this manual.
2. Observe proper polarity orientation between the batteries and battery charger.
3. Do not mix old and new batteries in this product.
4. Do not mix batteries of different sizes or from different manufacturers in this product.
Before installing or replacing batteries, disconnect the battery supply unit to the KSU by removing the
polarized battery connector at the KSU. Due to the weight of the batteries, it is advised that the battery
cabinet be removed from the wall before working on it.
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