7
Pre-installation checklist
Table 4 Checklist before installation
Item Requirements
Result
Installation
site
Ventilation
•
There is a minimum clearance of 100 mm (3.94 in)
around the inlet and outlet air vents for heat
dissipation of the firewall chassis.
•
A good ventilation system is available at the
installation site.
Temperature
•
Operating:
{
Without hard disks: 0°C to 45°C (32°F to 113°F)
{
With hard disks: 5°C to 40°C (41°F to 104°F)
•
Storage: –40°C to +70°C (–40°F to +158°F)
Relative humidity
•
Operating:
{
Without hard disks: 5% RH to 95% RH,
noncondensing
{
With hard disks: 10% RH to 90% RH,
noncondensing
•
Storage: 5% RH to 95% RH, noncondensing
Cleanness
•
Dust
concentration
≤
3 × 10
4
particles/m
3
•
No dust on desk within three days
ESD prevention
•
The equipment, workbench, and rack are reliably
grounded.
•
The equipment room is dust-proof.
•
The humidity and temperature are at an acceptable
level.
•
Wear an ESD wrist strap and make sure it makes
good skin contact and is reliably grounded when
installing FRUs.
•
Put the removed interface modules away on an ESD
workbench, with the PCB upward, or put them in ESD
bags for future use.
•
Touch only the edges, instead of electronic
components when observing or moving a removed
interface module.
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 reliably
grounded.
•
The grounding terminal of the AC power receptacle is
reliably grounded.
•
(Optional.) A power lightning arrester is installed.
Electricity safety
•
Equip a UPS.
•
Locate the power switch in the equipment room. In
case of emergency during operation, switch off the
power switch.
