Installation guide

Gas Average (mg/m³) Max (mg/m³)
SO
2
0.2 1.5
H
2
S 0.006 0.03
NO
2
0.04 0.15
NH
3
0.05 0.15
Cl
2
0.01 0.3
Table 2.2 Environmental Requirements: Particles
2.1.1.2 Temperature and Humidity
Although the switch is designed to use 4 fans, the site should still maintain a desirable
temperature and humidity. High-humidity conditions can cause electrical resistance degradation or
even electric leakage, degradation of mechanical properties and corrosion of internal components.
Extreme low relative humidity may cause the insulation spacer to contract, making the fastening screw
insecure. Furthermore, in dry environments, static electricity is liable to be produced and cause harm
to internal circuits. Temperature extremes can cause reduced reliability and premature aging of
insulation materials, thus reducing the switch’s working lifespan. In the hot summer, it is
recommended to use air-conditioners to cool down the site. And the cold winter, it is recommenced to
use heaters.
The recommended temperature and humidity is shown below:
Temperature: Relative humidity
Long term condition Short term condition Long term condition Short term condition
15 ~ 30°C 0 ~ 50°C 40 ~ 65% 10 ~ 95%
Table 2.3 Environmental Requirements: Temperature and Humidity
Caution
A sample of ambient temperature and humidity should be taken at 1.5m above the floor and 0.4m
in front of the switch rack, with no protective panel covering the front and rear of the rack
Short term working conditions refer to a maximum of 48 hours of continued operation and an
annual cumulative total of less than 15 days. Formidable operation conditions refers to the
ambient temperature and relative humidity value that may occur during an air-conditioning system
failure, and normal operation conditions should be recovered within 5 hours.
2.1.1.3 Power Supply
Before powering on the power supply, please check the power input to ensure proper grounding
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