Preparing For Installation; Safety Recommendations; Examining The Installation Site; Temperature/Humidity - H3C S5120-EI series Installation Manual

Preparing for installation

Safety recommendations

To avoid any equipment damage or bodily injury caused by improper use, observe these rules:
Before cleaning the switch, remove the power cord of the switch. Do not clean the switch with wet
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cloth or liquid.
Do not place the switch near water or in a damp environment. Prevent water or moisture from
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entering the switch chassis.
Do not place the switch on an unstable case or desk. The switch might be severely damaged in case
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of a fall.
Ensure proper ventilation of the equipment room and keep the ventilation vents of the switch free of
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obstruction.
• Make sure the operating voltage is as required.
To avoid electrical shocks, do not open the chassis when the switch is operating or when the switch
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is just powered off.
When replacing interface cards, wear an ESD-preventive wrist strap to avoid damaging the cards.
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Examining the installation site

The S5120-EI Switch Series must be used indoors. You can mount your switch in a rack or on a workbench,
but make sure:
• Adequate clearance is reserved at the air inlet and exhaust vents for ventilation.
The rack or workbench has a good ventilation system.
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The rack is sturdy enough to support the device and its accessories.
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The rack or workbench is well earthed.
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To ensure normal operation and long service life of your switch, install it in an environment that meets the
requirements described in the following subsections.

Temperature/humidity

Maintain temperature and humidity in the equipment room as described in
Lasting high relative humidity can cause poor insulation, electricity creepage, mechanical property
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change of materials, and metal corrosion.
Lasting low relative humidity can cause washer contraction and ESD and bring problems including
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loose captive screws and circuit failure.
High temperature can accelerate the aging of insulation materials and significantly lower the
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reliability and lifespan of the switch.
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"Technical specifications."