Temperature And Humidity; Cleanliness; Cooling - H3C WX2510H Installation Manual

Temperature and humidity

Maintain the temperature and humidity in the equipment room at acceptable levels.
•
Lasting high relative humidity can cause poor insulation, electricity leakage, mechanical
property change of materials, and metal corrosion.
•
Lasting low relative humidity can cause washer contraction and ESD and cause problems
including loose mounting screws and circuit failure.
•
High temperature can accelerate the aging of insulation materials and significantly lower the
reliability and lifespan of the device.
To ensure correct operation of the device, the equipment room must meet the temperature and
humidity requirements listed in
Table 1 Temperature/humidity requirements in the equipment room
Temperature
0°C to 45°C (32°F to 113°F)

Cleanliness

Dust buildup on the chassis might result in electrostatic adsorption, which causes poor contact of
metal components and contact points, especially when indoor relative humidity is low. In the worst
case, electrostatic adsorption can cause communication failure.
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

For heat dissipation, reserve a minimum of 10 cm (3.94 in) of clearance around the device.
Make sure the workbench has a good ventilation system.
Table 1.
Relative humidity
5% to 95%, noncondensing
Concentration limit (particles/m
4
≤ 3 x 10 (no visible dust on the tabletop over three days)
Table
3
Max. (mg/m )
0.2
0.006
0.05
0.01
0.04
2
3
)
3.