Dahua NVR52-4KS2 Series User Manual page 7

The Device must be installed in a location that only professionals can access. Non-professionals
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are not allowed to enter the installation area.
The Device must be reliably grounded by professionals. They must install the grounding
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conductor in the building floor and verify the grounding connection of the output receptacle.
Do not place the Device in a place exposed to sunlight or near heat sources.
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Keep the Device away from dampness, dust, and soot.
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Install the Device on a stable surface to prevent it from falling.
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Put the Device in a well-ventilated place, and do not block its ventilation.
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The Device is a class I electrical appliance. Make sure that the power supply of the Device is
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connected to a power socket with protective earthing.
Use power cords that conform to your local requirements, and are rated specifications.
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Before connecting the power supply, make sure the input voltage matches the server power
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requirement.
When installing the Device, make sure that the power plug can be easily reached to cut off the
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power.
It is prohibited for non-professionals and unauthorized personnel to open the device casing.
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Affix the controller securely to the building before use.
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Operation Requirements
The Device or remote control contains button batteries. Do not swallow the batteries
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due to the risk of chemical burns.
Possible result: The swallowed button battery can cause serious internal burns and death within
2 hours.
Preventive measures (including but not limited to):
Keep new and used batteries out of reach of children.
If the battery compartment is not securely closed, stop using the product immediately and
keep out of reach of children.
Seek immediate medical attention if a battery is believed to be swallowed or inserted inside
any part of the body.
Battery Pack Precautions
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Preventive measures (including but not limited to):
Do not transport, store or use the batteries in high altitudes with low pressure and
environments with extremely high and low temperatures.
Do not dispose the batteries in fire or a hot oven, or mechanically crush or cut the batteries
to avoid an explosion.
Do not leave the batteries in environments with extremely high temperatures to avoid
explosions and leakage of flammable liquid or gas.
Do not subject the batteries to extremely low air pressure to avoid explosions and the
leakage of flammable liquid or gas.
Place the Device in a location that children cannot easily access.
This is a class 1 laser device. You can only insert modules that meet the requirements of class 1
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lasers.
VI
User's Manual