9
O
3
< 2
71.04-1985 to be meet must also
increase by 1.
NOTE:
Part per billion (ppb) is a concentration unit. 1 ppb represents a volume-to-volume ratio of 1 to
100000000.
Requirements for the non-data center equipment room
The corrosive gas concentration for the non-data center equipment room must meet the
requirements of class 3C2 of IEC 60721-3-3:2002, as shown in
Table 5 Corrosive gas concentration limits in the non-data center equipment room
Gas
Average concentration (mg/m
3
)
Maximum concentration (mg/m
3
)
SO
2
0.3
1.0
H
2
S
0.1
0.5
Cl
2
0.1
0.3
HCI
0.1
0.5
HF
0.01
0.03
NH
3
1.0
3.0
O
3
0.05
0.1
NO
X
0.5
1.0
CAUTION:
As a best practice, control the corrosive gas concentrations in the equipment room at their average
values. Make sure the corrosive gas concentrations do not exceed 30 minutes per day at their
maximum values.
Guidelines for controlling corrosive gases
To control corrosive gases, follow these guidelines:
•
As a best practice, do not build the equipment room in a place with a high concentration of
corrosive gases.
•
Make sure the equipment room is not connected to sewer, sewage, vertical shaft, or septic tank
pipelines and keep it far away from these pipelines. The air inlet of the equipment room must be
away from such pollution sources.
•
Use environmentally friendly materials to decorate the equipment room. Avoid using organic
materials that contains harmful gases, such as sulfur or chlorine-containing insulation cottons,
rubber mats, sound-proof cottons, and avoid using plasterboards with high sulfur concentration.
•
Place fuel (diesel or gasoline) engines separately. Do not place them in the same equipment
room with the device. Make sure the exhausted air of the engines will not flow into the
equipment room or towards the air inlet of the air conditioners.
•
Place batteries separately. Do not place them in the same room with the device.
•
Employ a professional company to monitor and control corrosive gases in the equipment room
regularly.
Cleanliness requirements
Requirements of dust particle concentration vary by server model. For information about the
requirements, see the installation guide of the server.
