4
Table1-2 Dust concentration limit in the equipment room
Substance
Concentration limit (particles/m
3
)
Dust particles
≤ 3 × 10
4
(No visible dust on desk in three days)
NOTE:
Dust particle diameter ≥ 5 µm
The equipment room must also meet strict limits on salts, acids, and sulfides to eliminate corrosion
and premature aging of components, as shown in
Table1-3 Harmful gas limits in an equipment room
Gas
Max. (mg/m
3
)
SO
2
0.2
H
2
S
0.006
NH
3
0.05
Cl
2
0.01
NO
2
0.04
Cooling system
For adequate cooling of the firewall, follow these guidelines:
•
Plan the firewall installation position for the airflow direction of the firewall to match the
ventilation designs at the installation site.
•
Reserve a minimum clearance of 100 mm (3.94 in) around the chassis inlet and outlet air vents.
•
Maintain a distance of 1U (44.45 mm, or 1.75 in) between the chassis and other devices.
•
Make sure the installation site has a good cooling system.
The F100-C-G3, F100-S-G3, and F100-M-G3 firewalls cool themselves naturally.
The F100-A-G3, F100-E-G3, F1000-C-G3, F1000-S-G3, F1000-A-G3, and F1000-E-G3 firewalls
provide left side-intake and right-side exhaust airflow.
Figure1-2 Airflow through the firewall chassis
ESD prevention
ESD prevention guidelines
To prevent electrostatic discharge (ESD), follow these guidelines:
•
Make sure the firewall, the workbench, and the rack are reliably grounded.
Summary of Contents for SecPath F100-X-G3
Page 63: ...i Contents 1 Appendix B LEDs 1...
