Installation Site Checking; Temperature And Humidity; Cleanliness - H3C WX3000 Installation Manual

Installation Site Checking

The device is designed for indoor use. You can mount the device either in a rack or on a workbench, but
make sure that:
Adequate space is reserved at the air inlet and exhaust vents for heat dissipation.
The rack or workbench has a good ventilation system.
The rack is sturdy enough to support the device and its accessories.
The rack or workbench is well grounded.
To ensure normal operation and a long service life of your device, install it in an environment that meets
the following requirements.

Temperature and Humidity

The temperature and humidity in the equipment room must be kept within a proper range.
Lasting high humidity may lead to bad insulation, electricity creepage, mechanical property
changes, and corrosion.
If the relative humidity is too low, captive screws may become loose as a result of contraction of
insulation washers, and static electricity may be produced in a dry environment to interfere the
circuits on the device.
Lasting high temperatures accelerate the aging of insulation materials and thus significantly lower
the reliability and service life of the device.
The temperature and humidity requirements for the WX3000 series are listed in Table 2-1.
Table 2-1 Working environment
Temperature
Relative humidity

Cleanliness

Dust is hazardous to the operating safety of the device. Dust buildup on the chassis may result in static
adsorption, causing poor contact of metal connectors or metal contact points. When the relative indoor
humidity is low, especially, electrostatic adsorption is more likely to happen. This not only shortens the
service life of your device but also causes communication failures. The following table lists the dust
concentration limit in the equipment room.
Table 2-2 Dust concentration limit in the equipment room
Physical active substance
Dust particles
Note: The dust particle diameter is ≥ 5 μm
In addition, the equipment room should also meet the rigorous limits on salts, acids, and sulfides to
eliminate corrosion and premature aging of some parts. Table 2-3 lists the limits on harmful gases in the
equipment room.
Item
4
≤ 3 × 10 (No visible dust on the tabletop over three days)
0°C to 45°C (32°F to 113°F)
5% to 95% (noncondensing)
Limit (particles/m
2-2
Specification
3
)