H3C SecPath L5000-AD920 Installation Manual page 6

Examining the installation site
The device can only be used indoors. To make sure the device operates correctly and to prolong its
service lifetime, the installation site must meet the following requirements.
Weight support
Make sure the floor can support the total weight of the device and removable components.
For weights of a device and its removable components, see the hardware information and
specifications
https://www.h3c.com/en/Support/Resource_Center/Technical_Documents/Security/.
Temperature and humidity
For correct operation and long service life of your device, maintain the temperature and humidity in
the equipment room at acceptable ranges.
•
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 bring issues including
loose screws and circuit failure.
•
High temperature can accelerate the aging of insulation materials and significantly lower the
reliability and lifespan of the device.
For the temperature and humidity requirements of a device, see the hardware information and
specifications
https://www.h3c.com/en/Support/Resource_Center/Technical_Documents/Security/.
Cleanliness
Dust buildup on the chassis might result in electrostatic adsorption, which causes poor contact of
metal components and contact points, especially when indoor relative humidity is low. In the worst
case, electrostatic adsorption can cause communication failure.
concentration limits in the equipment room.
Table1-2 Dust concentration limits in the equipment room
Substance
Dust particles
NOTE:
Dust particle diameter ≥ 5 µm
The equipment room must also meet strict limits on salts, acids, and sulfides to eliminate corrosion
and premature aging of components, as shown in Table1-3.
Table1-3 Harmful gas limits in an equipment room
Gas
SO
2
H S
2
NH
3
Cl
2
for that device
for that device
on the H3C
on the H3C
Concentration limit (particles/m
≤ 3 × 10 4
(No visible dust on desk in three days)
Maximum concentration (mg/m
0.2
0.006
0.05
0.01
1-3
official website
official website
Table1-2 describes the dust
3
)
3
)
at
at