2
•
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
neighboring devices 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 mounting 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 for the switch, see
Hardware Information and
Specifications.
Cleanliness
Dust buildup on the chassis might result in electrostatic adsorption, which causes poor contact of
metal components and contact points. In the worst case, this might shorten the device's lifetime and
even cause communication failure.
describes the dust concentration limits in the equipment
room.
Table1-1 Dust concentration limit in the equipment room
Substance
Particle diameter
Concentration limit
Dust particles
≥ 0.5 µm
≤ 3.5 × 10
6
particles/m
3
Dust particles
≥ 5 µm
≤ 3 × 10
4
particles/m
3
Dust (suspension)
≤ 75 µm
≤ 0.2 mg/m
3
Dust (sedimentation)
75 µm to 150 µm
≤ 1.5 mg/(m
2
h)
Corrosive gases can accelerate corrosion and aging of metal components. Make sure the corrosive
gases in the equipment room do not exceed the concentration limits as shown in
Table1-2 Harmful gas limits in the equipment room
Gas
Average concentration
(mg/m
3
)
Maximum concentration
(mg/m
3
)
SO
2
0.3
1.0
H
2
S
0.1
0.5
Cl
2
0.1
0.3
HCI
0.1
0.5
HF
0.01
0.03