2-3
Installation site requirements
Airflow directions
Figure 2-2 Airflow through the server
(1) to (4) Directions of the airflow into the chassis and power supplies
(5) Direction of the airflow out of the power supplies
(6) to (8) Directions of the airflow out of the chassis
Temperature, humidity, and altitude requirements
To ensure correct operation of the server, make sure the room temperature, humidity, and altitude
meet the requirements as described in "Appendix C Environment requirements."
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 2-2 Mechanically active substance concentration limit in the equipment room
Substance
Particle diameter
Concentration limit
Dust particles
≥
5 µm
≤
3 × 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
