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3-1
3
Preparing for Installation
Environment Requirements
The U200 series are designed for indoor use. To ensure normal operation and prolong service life of the
U200 series devices, the installation site must meet the requirements described in this chapter.
Ventilation Requirements
The fans of a U200 series device draw air in through the inlet vents on the left and out through the
exhaust vents on the right. Take the U200-S as an example.
Figure 3-1
Air flow design of the U200 series
Make sure that:
There is at least 10 cm (3.94 in.) of clearance around the air intake and the air exhaust for heat
dissipation of the chassis.
A ventilation system is available at the installation site.
Temperature and Humidity Requirements
The equipment room must maintain proper humidity to prevent poor insulation, electricity creepage and
corrosion accompanying high humidity, and to prevent washer contraction and electrostatic discharge
accompanying low humidity. In dry environments where relative humidity is very low, electrostatic
discharge (ESD) is more likely to happen causing the complementary metal-oxide-semiconductor
(CMOS) circuitry to fail.
A proper temperature condition must also be maintained to prevent premature material aging and
degraded reliability accompanying high temperature conditions.
Table 3-1 lists the temperature and humidity requirements.
Table 3-1
Temperature and humidity requirements in the equipment room
Temperature
Relative humidity
0°C to 45°C (32°F to 113°F)
10% to 95% (noncondensing)
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