3Com 3C13755-US - Router 5642 Installation Manual page 60

58 C 4: I
HAPTER NSTALLING THE
General Site
Requirements
R
OUTER
During the installation, wear an Electro-Static Discharge (ESD) preventive wrist
strap and ESD-preventive gloves.
3Com recommends that you use an uninterrupted power supply (UPS) with your
router.
The environment of the installation site influences the performance and lifetime of
the router. The installation site for your router should meet the following
requirements for temperature and humidity, dust, gases, static electricity, and
electromagnetic discharge.
Temperature and Humidity
To ensure normal operation and to prolong the operational lifetime of the router,
the temperature and humidity of the equipment room must be within controlled
limits. The requirements for the temperature and humidity of the router
installation site are listed below.
Table 51 Temperature and Humidity Requirements
Temperature
0 0 to 40 0 C (32 0 to 104 0 F)
Dust
Dust is harmful to the safe operation of the router. The specifications for the dust
content and diameter of the granule within the equipment room are listed below.
Specification for Dust Content
Table 52
Maximum
diameter (µ m) 0.5
Maximum 1.4 x 10
density (the
number of
granules per
cubic meter)
Gases
The equipment room of the router must meet strict requirements for the content
of salt, acid and sulfide. The specific limitation values of these harmful gases are
given below.
Harmful Gas Limitation Values in Equipment Room
Table 53
Gas
SO
2
H S
2
NO
2
NH
3
Cl
2
Static Electricity
To prevent damage caused by the static electricity, ensure that:
The equipment is grounded
Relative humidity
5% to 85%
1
7 5
7 x 10
3
Average (mg/m )
0.2
0.006
0.04
0.05
0.01
3 5
5
2.4 x 10 1.3 x 10
3
Maximum (mg/m )
1.5
0.03
0.15
0.15
0.3
5