H3C Technologies H3C SecPath F5000-S Firewall - Manual (Page 12)

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• When you move or lift the firewall chassis, support the bottom of the chassis, rather than holding
any FRU. Make sure the accessories of the firewall are not lost or damaged during firewall moving.
Examining the installation site
The firewall can only be used indoors. To make sure the firewall operates properly and to prolong its
service lifetime, the installation site must meet the following requirements:
Weight support
Make sure the floor can support the total weight of the rack, chassis, cards, and all other components.
For more information, see "Dimensions and weight."
Temperature and humidity
Maintain appropriate temperature and humidity in the equipment room.
• Lasting high relative humidity can cause poor insulation, electricity creepage, mechanical property
change of materials, and metal corrosion.
• Lasting low relative humidity can cause washer contraction and ESD and bring problems including
loose captive screws and circuit failure.
• High temperature can accelerate the aging of insulation materials and significantly lower the
reliability and lifespan of the firewall.
For the temperature and humidity requirements of the firewall, see Table 2 .
Table 2 Temperature/humidity requirements
Temperature Relative humidity
• Operating: 0°C to 40°C (32°F to
104°F)
• Non operating: –40°C to +70°C
(–40°F to +158°F)
• Operating: 10% to 95%, noncondensing
• Non operating: 5% to 95%, noncondensing
Cleanness
Dust buildup on the chassis might result in electrostatic adsorption, which causes poor contact of metal
components and contact points, especially when indoor relative humidity is low. In the worst case,
electrostatic adsorption can cause communication failure.
Table 3 Dust concentration limit in the equipment room
Substance Concentration limit (particles/m 3 )
Dust particles
≤ 3 x 10 4
(No visible dust on desk in three days)
NOTE:
Dust particle diameter ≥ 5 μm