H3C SecCenter CSAP-SA, Installation Manual, Page: 13 / 71

2
increases by 100 m (328.08 ft) from 900 m (2952.76 ft)
Storage altitude –60 m to +5000 m (–196.85 ft to +16404.20 ft)
Equipment room height requirements
To ensure correct operation of the server, make sure the equipment room height meets the
requirements as described in "Appendix A Server specifications."
Cleanliness requirements
Mechanically active substances buildup on the chassis might result in electrostatic adsorption, which
causes poor contact of metal components and contact points. In the worst case, electrostatic
adsorption can cause communication failure.
Table 3 Mechanically active substance concentration limit in the equipment room
Substance Particle diameter Concentration limit
Dust particles
≥ 5 µm
≤ 3 x 10
4
particles/m
3
(No visible dust on desk in three days)
Dust (suspension)
≤ 75 µm ≤ 0.2 mg/m 3
Dust
(sedimentation)
75 µm to 150 µm
≤ 1.5 mg/(m 2
h)
Sand
≥ 150 µm ≤ 30 mg/m 3
The equipment room must also meet limits on salts, acids, and sulfides to eliminate corrosion and
premature aging of components, as shown in
Table 3 .
Table 4 Harmful gas limits in an equipment room
Gas Maximum concentration (mg/m
3
)
SO
2
0.2
H
2
S 0.006
NO
2
0.04
NH
3
0.05
Cl
2
0.01
Grounding requirements
Correctly connecting the server grounding cable is crucial to lightning protection, anti-interference,
and ESD prevention. The server can be grounded through the grounding wire of the power supply
system and no external grounding cable is required. Make sure the resistance between the server
chassis and the ground is less than 10
Ω.
Installation tools
Table 4 lists the tools that you might use during installation.