AP7052DN&AP7152DN
Hardware Installation and Maintenance Guide
5 Appendix
Issue 01 (2017-12-29)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
120
Table 5-16
Requirements for dust particles in the equipment room
Mechanical active
material
Unit
Concentration
Dust particle
Particle /m
3
≤ 3x 10
4
(no visible dust accumulated
on a workbench in three
days)
Suspending dust
mg/m
3
≤0.2
Precipitable dust
mg/m
2
·h
≤1.5
Description
Dust particle diameter ≥ 5 µm
Suspending dust diameter ≤ 75 µm
75 µm ≤ precipitable dust diameter ≤ 150 µm
Take the following measures to meet the requirements:
Use dustproof materials for ground, wall, and ceiling construction.
Use screens on the door and windows facing outside. The outer windows should be
dust-proof.
Clean the equipment room regularly and clean the air filter monthly.
Wear shoe covers and ESD clothing before entering the equipment room.
5.2.1.5 Requirements for Corrosive Gases
The room should be free from dusts and corrosive gases, such as SO
2
, H
2
S, and NH
3
5-17 lists the requirements for the corrosive gas concentration.
Table 5-17
Requirements for corrosive gas concentration
Chemical active
material
Unit
Concentration
SO
2
mg/m
3
≤0.30
H
2
S
mg/m
3
≤0.10
NO
x
mg/m
3
≤0.50
NH
3
mg/m
3
≤1.00
Cl
2
mg/m
3
≤0.10
HCl
mg/m
3
≤0.10
HF
mg/m
3
≤0.01
O
3
mg/m
3
≤0.05