H3c-technologies H3C S5120 Series Switches User Manual download pdf (Page 24)

Preparing for installation

Safety precautions

To avoid any device impairment and bodily injury caused by improper use, observe these rules:

• Before cleaning the switch, unplug the power cord of the switch first. Do not clean the switch with

wet cloth or liquid.

• Do not place the switch near water or in a damp environment. Prevent water or moisture from

entering the switch chassis.

• Do not place the switch on an unstable case or desk. The switch might be damaged severely in case

of a fall.

• Ensure proper ventilation of the equipment room and keep the ventilation vents of the switch free of

obstruction.

• Connect the yellow-green protection grounding cable before power-on.

• Make sure that the operating voltage is as required.

• Do not open the chassis to avoid electrical shocks when the switch is operating or just when the

switch is powered off.

Examining the installation site

The S5120-SI Switch Series must be used indoors. You can mount the switch in a rack or on a workbench,

but make sure:

• Adequate clearance is reserved at the air inlet/exhaust vents for ventilation.

• The rack or workbench has a good ventilation system.

• The rack is sturdy enough to support the switch and its accessories.

• The rack or workbench is well grounded.

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

You must maintain a proper temperature and humidity in the equipment room. Long-term high humidity

may lead to bad insulation, electricity leakage, mechanical property changes, and metal corrosion.

However, if the relative humidity is too low, captive screws may become loose as the result of contraction

of insulation washers and static electricity may be produced in a dry environment to jeopardize the

circuits on the device. A high temperature is the most undesirable condition, because it accelerates the

aging of insulation materials and thus significantly lowers reliability and service life of the switch.

For the temperature and humidity requirements of different models, see Table 1 in the c

hapter “Product

overview”.

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H3c-technologies H3C S5120 Series Switches User Manual Page 24