8
Altitude
Table 3
Altitude requirements
Item Altitude
Operating altitude
–60 m (–196.85 ft) to 4 km (2.49 miles)
Storage altitude
–60 m (–196.85 ft) to 4.5km(2.8 miles)
Cleanness
Dust buildup on the chassis may result in electrostatic adsorption, which causes poor contact of metal
components and contact points, especially when indoor humidity is low. In the worst case, electrostatic
adsorption can cause communication failure.
Table 4
Dust concentration limit in the equipment room
Substance
Concentration limit (particles/cu m)
Dust particles
≤
3 x 10
4
(No visible dust on desk in three days)
NOTE:
Dust particle diameter
≥
5
μ
m
The equipment room must also meet strict limits on salts, acids, and sulfides to eliminate corrosion and
premature aging of components, as shown in
.
Table 5
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
Cooling system
The F5000 firewall adopts left to right airflow for heat dissipation.
Summary of Contents for F5000
Page 6: ...iv Index 92 ...
Page 11: ...5 Fan trays Figure 9 Fan tray 1 Handle 2 Fans ...
