Cooling; Esd Prevention - H3C WX3500H Series Installation Manual

Table 2 Dust concentration limit in the equipment room
Substance
Dust particles
NOTE:
Dust particle diameter ≥ 5 µm
To eliminate corrosion and premature aging of components, the equipment room must also meet
limits on salts, acids, and sulfides, as shown in
Table 3 Harmful gas limits in an equipment room
Gas
SO
2
H S
2
NH
3
Cl
2
NO
2

Cooling

The device uses left-to-right airflow. For adequate heat dissipation, make sure the following
requirements are met:
•
A minimum clearance of 100 mm (3.94 in) is reserved around the air vents.
•
The rack has a good ventilation system.
Figure 1 Airflow through the chassis (WX3508H)

ESD prevention

To prevent electrostatic discharge (ESD), follow these guidelines:
•
Ground the device and rack or workbench reliably.
•
Take dust-proof measures for the equipment room. For more information, see "Cleanliness."
Concentration limit (particles/m
4
≤ 3 x 10
(No visible dust on desk in three days)
Table 3.
3
Max. (mg/m )
0.2
0.006
0.05
0.01
0.04
3
3
)