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CHAPTER 1: SAFETY AND GENERAL INFORMATION
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Deenergizing Safety
The UPS contains internal batteries and may present a shock hazard even when disconnected
from the branch circuit (mains). Before installing or servicing the equipment, ensure that the
system enable switch and input circuit breaker are set to stand-by (OFF), that internal battery
modules are removed, that external extended run batteries are disconnected and the branch
circuit (mains) is disconnected.
Electrical Safety
• The protective earth conductor for the UPS carries the leakage current from the load devices
(computer equipment). Therefore, the size of the conductor must be at least as large as the
wire required by IEC 950. An insulated grounding conductor that is identical in size, insulation
material, and thickness to the grounded and ungrounded branch-circuit supply conductors,
except that it is green with or without a yellow stripe is to be installed as part of the branch
circuit that supplies the UPS.
• The grounding conductor described above is to be grounded to earth at the service
equipment, or if supplied by a separately derived system, at the supply transformer or motor-
generator set.
• The attachment-plug receptacles near the unit or subsystem are all to be of a grounding type,
and the grounding conductors serving these receptacles are to be connected to earth ground
at the service equipment.
Battery Safety
• Each battery module is a 120 V, 7.2 Ah battery pack. There is a risk of energy hazard. Before
installing or replacing battery nodules, remove jewelry such as wristwatches and rings. High
short -circuit current through conductive materials could cause severe burns.
• Do not dispose of batteries in a fire. The batteries may explode.
• Do not open or mutilate batteries. Released electrolyte is harmful to the skin and eyes, and
may be toxic.
Do not install the battery modules in the frame until you are ready to power up the UPS. Failure
to do so can result in a deep discharge of the batteries, which may cause permanent damage.
• Batteries are recyclable. Used batteries can be sent to APC for recycling or delivered to a
recycling facility.
• Store the battery module(s) at a cool ambient temperature of < 25 °C.
• Only use APC batteries when adding or replacing battery modules in the UPS.