NetCol5000-A020 Air Cooled In-row Precision Air
Conditioner
User Manual
3 Installation Guide
Issue 01 (2014-06-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
25
Take care to prevent the components and cables from damage.
To ensure good ventilation, do not place the indoor unit in the corner of a room or the
end of a long-and-narrow room.
During the NetCol5000-A020 operation, all doors and windows of the shelter or
equipment room should be closed to reduce the additional load of the NetCol5000-A020.
Routing Refrigerant Pipes
Pipe length mentioned in this document is equivalent.
When selecting the refrigerant pipes, note the following:
Avoid elbows and ensure that the indoor unit and the outdoor unit are connected by using
shortest pipes.
Calculate the number of the components that cause local resistance loss, for example,
bends, and convert them into the equivalent length to straight pipes, as shown in
Table
3-8
.
The total length (L) of pipes connecting the indoor unit and outdoor unit equals the
equivalent length of the straight pipes plus the length of the straight pipes connecting the
indoor unit and outdoor unit.
You are advised to select the pipes based on the total length of the pipes connecting the
indoor unit and outdoor unit, because different pipe diameters influence the voltage drop
and performance of the cooling system. For details, see
Table 3-9
.
Table 3-8
Equivalent length of components
Outer Pipe
Diameter
(inch)
Equivalent Length (m)
45-degree
Bend
90-degree
Bend
180-degree
Bend
T-shaped
Connector
3/8
0.12
0.2
0.4
0.6
1/2
0.14
0.25
0.5
0.65
5/8
0.17
0.3
0.6
0.7
3/4
0.2
0.35
0.7
0.8
7/8
0.24
0.42
0.8
1.2
1
0.28
0.5
1
1.3
1-1/8
0.32
0.6
1.2
1.4
