Huawei NetCol5000-A021 User Manual page 68

NetCol5000-A021 In-row Air Cooled Smart Cooling
Product
User Manual (208 V)
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 3-11 Recommended pipe specifications
Pipe Length (m)
L ≤ 80
Note: If the pipe is longer than 80 m, contact Huawei technical support.
Connect refrigerant pipes based on


Figure 3-32 Installing a refrigerant pipe
Procedure
Step 1 Remove the plugs from the pipes using a welding torch, as shown in
Exercise caution during welding to avoid burning components, such as rubber rings, inside the
cabinet.
Charge nitrogen to protect pipes from oxidation while you weld the pipes, as shown in
3-34.
Issue 03 (2020-01-10)
If the direction of a refrigerant pipe changes, add a support at the position 500 mm
before and after the changing point respectively.
If a refrigerant pipe is straight, add a support every 1500 mm.
Site personnel should prepare the required materials and install the supports. For detailed requirements
on the pipe support, see Figure
Copyright © Huawei Technologies Co., Ltd.
Table
Recommended Diameter for
Gas Pipes (inch)
3/4
Figure 3-32.
3-2.
3 Installation Guide
3-11.
Recommended Diameter
for Liquid Pipes (inch)
5/8
Figure 3-33.
Figure
60