Huawei NetCol5000-A - Page 61

NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
3 Installation Guide
Issue 01 (2017-07-27)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
53
2. After determining the best pipe route between the indoor and outdoor units, calculate the
number of the components that cause local resistance loss, for example, elbows, and
convert them into the equivalent length to straight pipes, as shown in Table 3-10.
3. The total length of pipes connecting the indoor and outdoor units equals to the equivalent
length of the straight pipes plus the length of the straight pipes connecting the indoor and
outdoor units.
4. You are advised to select the pipes based on the total length of the pipes connecting the
indoor and outdoor units, because different pipe diameters influence the voltage drop and
performance of the cooling system. For details, see Table 3-11.
5. Pipe length mentioned in this document is equivalent.
Table 3-10 Equivalent length of components
Copper Pipe
Outer
Diameter
(in.)
45° Bend
(Unit: m)
90° Bend
(Unit: m)
180° Bend
(Unit: m)
T-shaped
Three-Way
Valve
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 3-11 Recommended pipe specifications
Pipe Length (m)
Recommended Gas Pipe
Diameter
Recommended Liquid
Pipe Diameter
L ≤ 60 m
7/8 inch (22.22 mm)
5/8 inch (15.88 mm)
60 m < L ≤ 100 m
7/8 inch (22.22 mm)
3/4 inch (19.05 mm)
If the one-way pipe length is longer than 100 m, contact Huawei technical support.
To dampen noises generated by the equipment due to vibration, refrigerant pipe supports
should be installed as required by Figure 3-26.

When the direction of the refrigerant pipe changes, add a support at the position that is
500 mm away from the changing point.

If the refrigerant pipe is straight, add a support every 1500 mm.