Welding Indoor Unit Pipes - Huawei NetCol5000-A050 User Manual

NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual

4.8.2 Welding Indoor Unit Pipes

Precautions
Table 4-17 Recommended pipe specifications
Pipe Length (m)
L ≤ 60 m
60 m < L ≤ 100 m
If the one-way pipe length is longer than 100 m, contact Huawei technical
support.
Exhausting Nitrogen
Step 1 Remove the bonnet of the low-pressure needle valve and connect the pressure
gauge leather hose to the needle valve.
Figure 4-61 Exhausting nitrogen
(1) Low-pressure needle valve (2) Exhaust pipe needle valve
Step 2 Open the pressure gauge valve. Loud noises of air flow are generated at first and
then disappear gradually.
Step 3 After the airflow noise disappears, remove the rubber hose and install the valve
bonnet.
Step 4 Continue exhausting nitrogen from the exhaust pipe needle valve and liquid pipe
needle valve by performing
----End
Issue 08 (2021-09-17)
Recommende
d Gas Pipe
Diameter
7/8 inch
7/8 inch
Step 1
Copyright © Huawei Technologies Co., Ltd.
Recomme Recommen
nded Wall ded Liquid
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1.2 mm 3/4 inch
(3) Liquid pipe needle valve
to Step 3.
4 Installation
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