Connection Warnings; Operation - LEGRAND NUMERIC ONFINITI User And Installation Manual

1-4. Connection Warnings

Please note that there is no standard backfeed protection inside. Therefore, isolate the UPS before working
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according to this circuit. Ensure that the isolation device can safely carry the UPS input current.
This UPS should relate to TN earthing system.
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The power supply for this unit must be single-phase rated in accordance with the equipment nameplate. It
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also must be suitably grounded.
Using this equipment in life support applications, where failure could cause life support equipment to fail or
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significantly affect its safety or effectiveness, is not recommended. Additionally, do not use this equipment
in the presence of a flammable anesthetic mixture with air, oxygen, or nitrous oxide.
Connect your UPS power module's grounding terminal to a grounding electrode conductor.
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The UPS is connected to a DC energy source (battery). The output terminals may be live when the UPS is not
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connected to an AC supply.
Before working on this circuit
- Isolate Uninterruptible Power System (UPS)
- Then check for Hazardous Voltage between all terminals including the protective earth.

1-5. Operation

Do not disconnect the earth conductor cable from the UPS or the building wiring terminals at any time, as
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this would cancel the protective earth of the UPS system and all connected loads.
The UPS system features its own internal current source (batteries). The UPS output sockets or output
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terminal blocks may be electrically live even if the UPS system is not connected to the building wiring outlet.
To fully disconnect the UPS system, press the 'OFF' button first, and then disconnect the mains.
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Ensure that no liquid or foreign objects can enter the UPS system.
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The UPS can be operated by individuals with no previous experience.
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Risk of Voltage Backfeed
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