Cooling; Esd Prevention - H3C WX3820X Installation Manual

To eliminate corrosion and premature aging of components, the equipment room must also meet
limits on salts, acids, and sulfides, as shown in Table1-3.
Table1-3 Harmful gas limits in an equipment room
Gas
SO
2
H S
2
NH
3
Cl
2
NO
2

Cooling

The device uses left-to-right airflow. For adequate heat dissipation of the device, follow these
guidelines:
•
Plan the installation site for the device based on the airflow direction
•
Reserve a minimum clearance of 100 mm (3.94 in) around the air vents.
•
Make sure the rack or workbench has a good ventilation system.
Figure1-1 Heat dissipation

ESD prevention

On the communication network, ESD comes from the following sources:
•
External electric field such as outdoor high-voltage power lines and thunder and lightning.
•
Indoor environment, floor materials, device materials, and device components.
To prevent electrostatic discharge (ESD), follow these guidelines:
•
Ground the device reliably.
•
Take dust-proof measures for the equipment room. For more information, see "Cleanliness."
•
Maintain the humidity and temperature at acceptable levels. For more information, see
"Temperature and
•
Before working with the device, wear ESD gloves and ESD garment, and remove conductive
objects such as jewelry or watch. Make sure the wrist strap makes good skin contact and is
reliably grounded.
•
Always remember to wear an ESD wrist strap when working with a transceiver module.
Max. (mg/m
0.2
0.006
0.05
0.01
0.04
humidity."
1-3
3
)