Huawei NetCol5000-A021 User Manual page 69

NetCol5000-A021 In-row Air Cooled Smart Cooling
Product
User Manual (208 V)
Nitrogen injection volume range: 6–12 L/min. The nitrogen injection time for the entire
system is greater than 2 minutes. The nitrogen injection time after pipe welding is greater than
1 minute.

Slowly charge nitrogen into pipes through the discharge pipe needle valve when welding
gas pipes.

Slowly charge nitrogen into pipes through the liquid pipe needle valve when welding
liquid pipes.
Figure 3-33 Routing pipes from the bottom
(1) Gas pipe
Figure 3-34 Welding schematic diagram
Step 2 Take out two straight pipes whose diameters are 3/4 inch and 5/8 inch respectively from the
fitting bag, and weld the two pipes, as shown in
Issue 03 (2020-01-10) Copyright © Huawei Technologies Co., Ltd.
(2) Liquid pipe
Figure 3-33.
3 Installation Guide
61