Huawei NetCol5000-A-035 - Page 59

NetCol5000-A(025, 035) In-row Air Cooled Smart
Cooling Product
User Manual (600 mm)
3 Installation Guide
Issue 13 (2019-01-15)
Copyright © Huawei Technologies Co., Ltd.
50
Figure 3-24 Routing the refrigerant pipe
Onsite personnel prepare the required materials and install the supports.
When selecting the refrigerant pipes, note the following:
1. Avoid elbows and ensure that the indoor unit and the outdoor unit are connected by
using shortest pipes.
2. Calculate the number of the components (such as elbows) that cause local resistance loss,
and convert them into the equivalent length to straight pipes, as described in Table 3-12.
3. The total length of pipes connecting the indoor unit and the outdoor unit equals to the
equivalent length for the local resistance loss plus the length of the straight pipes
connecting the indoor unit and the outdoor unit.
4. You are advised to select the pipes based on the total length of the pipes connecting the
indoor unit and the outdoor unit, because different pipe diameters influence the pressure
drop and performance of the cooling system. For details, see Table 3-13.
5. Pipe length mentioned in this document is equivalent.
Table 3-12 Equivalent length of components
Pipe Outer
Diameter
(in)
45-Degree
Bends(m)
90-Degree
Bends(m)
180-Degree
Bends(m)
3-Way(m)
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