Cooling; Esd Prevention - H3C WX5540E 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

Cooling

The device uses left to right airflow for heat dissipation. Plan the installation site for adequate ventilation.
H3C recommends that you leave a minimum of 10 cm (3.94 in) of clearance around the air vents.
•
Make sure the rack is well ventilated.
•
Figure 1 Airflow through the device chassis

ESD prevention

To prevent electrostatic discharge (ESD), follow these guidelines:
Ground the device properly.
•
• Take dust-proof measures for the equipment room. For more information, see "Cleanness."
Maintain the humidity and temperature at a proper level. For more information, see
•
and humidity."
Concentration limit (particles/m
≤ 3 x 10 4
(No visible dust on desk in three days)
Table 3.
Max. (mg/m 3 )
0.2
0.006
0.05
0.01
3
3 )
"Temperature