Chapter 2 Preparing For Installation; General Site Requirements; Temperature And Humidity; Cleanness - 3Com 6040 Installation Manual

3Com Router 6000 Family
Installation Manual

Chapter 2 Preparing for Installation

2.1 General Site Requirements

The Router 6000 must be used indoors. To guarantee normal operation and longevity of your
device, its installation site should meet the requirements described in this chapter.

2.1.1 Temperature and Humidity

The equipment room must maintain proper humidity to prevent poor insulation, electricity
creepage and corrosion accompanying high humidity, or washer contraction and
electrostatic discharge accompanying low humidity. In dry environments where the relative
humidity is very low, electrostatic discharge (ESD) is more likely causing the
complementary metal-oxide-semiconductor (CMOS) circuitry to fail.
A proper temperature condition must also be maintained to prevent premature material
aging and degraded reliability accompanying high temperature conditions.
The following table lists the temperature and humidity requirements.
Table 2-1 Temperature/humidity requirements in the equipment room
o
0 C to 40

2.1.2 Cleanness

Dust is hazardous to the operating safety of your device. Dust buildup on the chassis may
result in static absorption, causing poor contact of metal components or points. When indoor
humidity is extremely low, this is more likely to happen to shorten the useful life of the device
and cause communication failures.
The equipment room must be free of explosion hazards and the electrical and magnetic
conductible dust as well. The following table lists the limits on dust particles:
Table 2-2 Limits on the dust particles in the equipment room
Mechanical active material
Dust particle
Note: Dust particles' diameter ≥ 5µm
Temperature
o o o
C (32 F to 104 F)
3Com Corporation
5% to 90%
Unit
particle/m³
2-1
Preparing for Installation
Relative humidity
Content
4
≤3 x 10
(No visible dust on desk in
three days)
Chapter 2