Huawei NetCol5000-A035 - Page 63

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
dierent pipe
diameters inuence 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
Table 3-13 Recommended pipe specications
Pipe Length (m)
Recommended Diameter
for Discharge Pipes (inch)
Recommended Diameter
for Liquid Pipes (inch)
L ≤ 60 7/8 5/8
Note: If the pipe is longer than 60 m, contact Huawei technical support.
NetCol5000-A(025, 035) In-row Air Cooled Smart
Cooling Product
User Manual (600 mm Width) 3 Installation Guide
Issue 17 (2020-10-22) Copyright © Huawei Technologies Co., Ltd. 53