Cleanness Requirements - Huawei Quidway R2600 Series Installation Manual

Installation Manual
Quidway R2600/3600 Series Modular Routers
Table 3-1 Humidity requirement in the equipment room
Normal operating condition
15 O C to 30
Note:
1) The values of environmental temperature and humidity in the equipment room are measured at 1.5m
high and 0.4m away from the front of the router rack when there is no protective board installed in front and
at the back of the rack.
2) Safety operating condition refers to the continuous operation for less than 48 hours or the accumulative
annual operation time less than 15 days.
3) The extreme environment refers to the likely environmental temperature and humidity when the air
conditioning system in the equipment room fails (the normal operating condition should be recovered
within five hours for each failure).

3.2.2 Cleanness Requirements

Dust undermines the normal operation of R2600/3600 series. Dust dropping on the
equipment can cause electrostatic adsorption, which degrades the contact
performance of the metal connection parts or connectors. This happens more
frequently when the indoor relative humidity is low, which will not only shorten the
router's service life, but also cause communication failure.
The recommended specification on dust content and particle diameter in the equipment
room is shown in Table 3-2:
Table 3-2 Specification on dust content in equipment room
The routers also have rigorous demand on the content of salts, acids and sulfides in the
air. These harmful gases will speed up the metal rusting and the aging processes of
certain parts. The equipment room should be protected from the invasion of harmful
gases such as SO
3-3:
Temperature
Safety operating
condition
O C 0 O Cto 45
Maxim diameter ( m)
0.5
1
3
5
H S, NO NH
2, 2 2,
Normal operating condition
O C 40% to 65%
Max. intensity (particles per cubic meter)
and Cl , the value limits of which are shown in Table
3 2
3-2
Chapter 3
Installation Preparations
Relative humidity
Safety operating
condition
10% to 90%
1.4 x 10 7
7 x 10 5
2.4 x 10 5
1.3 x 10
5