Table of Contents
Advertisement
•
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 power supplies and fan modules, wear an ESD wrist strap to
avoid damaging the units.
Examining the installation site
The switch must be used indoors. Mount your switch in a rack and verify the following items:
•
Adequate clearance is reserved at the air inlet and outlet vents for ventilation.
•
The rack 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 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 appropriate temperature and humidity in the equipment room.
•
Lasting high relative humidity can cause poor insulation, electricity leakage, mechanical
property change of materials, and metal corrosion.
•
Lasting low relative humidity can cause washer contraction and ESD and cause problems
including loose 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
views and technical
Cleanliness
Dust buildup on the chassis might cause electrostatic adsorption and dust corrosion, resulting in
poor contact of metal connectors and contact points. This might shorten the device's lifetime and
even cause device failure in the worst case.
equipment room.
Table1-2 Dust concentration limits in the equipment room
Substance
Dust particles
Dust particles
Dust (suspension)
Dust (sedimentation)
To maintain cleanliness in the equipment room, follow these guidelines:
specifications."
Particle diameter
≥ 0.5 µm
≥ 5 µm
≤ 75 µm
75 µm to 150 µm
Table1-2
describes the dust concentration limits in the
Concentration limit
≤ 3.5 × 10
≤ 3 × 10
≤ 0.2 mg/m
≤ 1.5 mg/(m
1-2
"Appendix A Chassis
6
3
particles/m
4
3
particles/m
3
2
h)
Advertisement
Table of Contents
