3Com 3C13840, Installation Manual

Page: 19 / 82

3
I
NSTALLING
T
HE
R
OUTER
General Site
Requirements
To ensure the proper working of the routers and prolong their service life, the
installation site should meet the requirements described in the following sections.
Temperature/Humidity
Requirements
To ensure normal operation of the Router, the equipment room must maintain
temperature and humidity. Long-lasting moisture can degrade the performance of
the insulating material, which may result in electric leakage, leading to metal
erosion. The following table lists the requirements of 3Com Router 6000 in
temperature and humidity.
Table 1 Temperature/Humidity requirements in the equipment room
The values of the operating temperature and humidity in a router equipment
refers to the values measured at the position 1.5m above the floor and 0.4m
ahead of the router rack, given there are no protective boards in front or at the
back of the router rack.
Cleanliness
Requirements
Dust is harmful to the safe operation of the Router. Dust on the chassis may result
in static absorption, and causes poor contact of the metal connection components
or points.
There should not be explosive, conductive, magnetic and corrosive dust in the
equipment room where 3Com 6000 Routers are located, and the dust
concentration should meet the following requirements:
Table 2 Limitation on dust content in equipment room
Besides the dust specifications, the equipment room of the Router should also
meet the rigorous requirements for the content of salt, acid and sulfide. These
harmful gases could accelerate the metal erosion and the aging process of some
parts. The specific limits of these harmful gases are given in the following table.
Temperature Relative humidity
0
o
C to 40
o
C 10% to 90%
Mechanical active material Unit Content
Dust particle particle/m³ 3 x 104
(No visible dust on desk in
three days)
Note: Dust particle Diameter 5µm