H3C SR6608/6604 Routers Installation Manual
Chapter 4 Preparing for Installation
4-2
Table 4-2
Limitation on dust concentration and diameter in the equipment room
Diameter (
μ
m)
0.5
1
3
5
Concentration
limit (particles/m³)
1.4 x 10
7
7 x 10
5
2.4 x 10
5
1.3 x 10
5
II. Concentration limit of harmful gases
Besides, the contents of salt, acid, and sulfide in the equipment room of the router
should be strictly restricted. Harmful gases could accelerate the corrosion of metal
parts and the aging of some parts. Table 4-3 lists the concentration limit of SO
2
, H
2
S,
NH
3
, and CI
2
in the equipment room.
Table 4-3
Concentration limit of some harmful gases in the equipment room
Gas
Max (mg/m
3
)
SO
2
0.2
H
2
S 0.006
NH
3
0.05
Cl
2
0.01
4.1.3 Ventilation Requirements
The fans of the device draw air in through the inlet vents on the left and out through the
exhaust vents on the right. The following figure uses the SR6608 as an example to
depict the ventilation of the SR6608 and SR6604 routers.
Figure 4-1
Ventilation method for the device
