H3C RA5300, Руководство по установке

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1-3
The equipment room must also meet limits on salts, acids, and sulfides to eliminate corrosion and
premature aging of components, as shown in
Table1-3 .
Table1-3 Harmful gas limits in the equipment room
Gas Max. (mg/m
3
)
SO
2
1.0
H
2
S 0.5
NH
3
3.0
NO
2
1.0
Cl
2
0.3
Cooling system
The router uses left-to-right airflow for heat dissipation, as shown in Figure1-1 .
For adequate cooling of the router, follow these guidelines:
•
Plan the installation location for the router based on its airflow direction.
•
Ensure a minimum clearance of 100 mm (3.94 in) around the air inlet and outlet vents on the
router.
•
Make sure that the installation site has a good cooling system.
Figure1-1 Airflow through the chassis
Grounding
Correctly grounding the router is crucial to lightning protection, anti-interference, and ESD
prevention. Use a good grounding system for the router. Make sure the resistance between the
chassis and the ground is less than 1 ohm.
For more information about grounding the router, see " Grounding the router ."
ESD prevention
CAUTION:
Check the resistance of the ESD wrist strap for safety. The resistance reading must be in the range
of 1 to 10 megohm (Mohm) between human body and the ground.