8
Checklist before installation
Table 4
Checklist before installation
Item Requirements
Result
Installation site
Weight support
The floor can support the total weight of the rack,
chassis, cards, power modules, and all other
components.
Operating ambient
temperature
0°C to 45°C (32°F to 113°F)
Operating ambient
relative humidity
10% to 95% (noncondensing)
Cleanness
•
Dust concentration
≤
3 × 10
4
particles/m
3
•
No dust on desk within three days
Ventilation
•
There is a minimum clearance of 10 cm (3.94 in)
around the inlet and exhaust vents for heat
dissipation of the firewall chassis.
•
A ventilation system is available at the installation
site.
ESD prevention
•
The equipment and floor are well grounded.
•
The equipment room is dust-proof.
•
The humidity and temperature are at a compliant
range.
•
Wear an ESD wrist strap and uniform when
touching a circuit board.
•
Place the removed MPU, service card, and CF
card on an antistatic workbench, with the face
upward, or put it into an antistatic bag.
•
Touch only the edges, instead of electronic
components when observing or moving a
removed MPU, CF card, or service card.
EMI prevention
•
Take effective measures to protect the power
system from the power grid system.
•
Separate the protection ground of the firewall from
the grounding device or lightning protection
grounding device as far as possible.
•
Keep the firewall far away from radio stations,
radar and high-frequency devices working in high
current.
•
Use electromagnetic shielding when necessary.
Lightning
protection
•
The grounding cable of the chassis is well
grounded.
•
The grounding terminal of the AC power
receptacle is well grounded.
•
A lightning protector for a network port is
installed. (Optional)
•
The AC power supply has been connected to a
power strip with lightning protection. (Optional)
