2
Before cleaning the switch, remove all power cords from the switch. 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 severely damaged in case
of a fall.
Ensure good ventilation of the equipment room and keep the air inlet and outlet vents of the switch
free of obstruction.
Connect the yellow-green protection grounding cable before power-on.
Make sure the operating voltage is in the required range.
To avoid electrical shocks, do not open the chassis while the switch is operating or when the switch
is just powered off.
When replacing FRUs, including interface cards, power supplies, and fan trays, wear an ESD wrist
strap to avoid damaging the units.
Examining the installation site
The switch 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 outlet vents for ventilation.
The rack or workbench has a good ventilation system.
Identify the hot aisle and cold aisle at the installation site, and make sure ambient air flows into the
switch from the cold aisle and exhausts to the hot aisle.
Identify the airflow designs of neighboring devices, and prevent hot air flowing out of the bottom
device from entering the top device.
The rack is sturdy enough to support the switch and its accessories.
The rack or workbench is reliably grounded.
To ensure correct 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 "Appendix A Chassis views
and technical specifications."
Lasting high relative humidity can cause poor insulation, electricity creepage, mechanical property
change of materials, and metal corrosion.
Lasting low relative humidity can cause washer contraction and ESD and bring problems including
loose captive screws and circuit failure.
High temperature can accelerate the aging of insulation materials and significantly lower the
reliability and lifespan of the switch.
For the temperature and humidity requirements of different switch models, see "Technical specifications."
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