Cooling; Esd Prevention - H3C WX5540H 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 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 or workbench has a good ventilation system.
•
Figure 1 Airflow through the chassis

ESD prevention

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