Figure 3-43 Leakage test with nitrogen in the scenario with a low-temperature
component
(1) Pressure gauge 1 (2) Pressure gauge 2 (3) Coupling nut
(4) Discharge pipe needle
valve
(5) Liquid pipe needle valve (6) Low-pressure needle valve
(7) Reducing valve (8) Nitrogen cylinder
Step 2 Inject 3.0 MPa nitrogen and preserve the pressure for 24 hours. The system
pressure should stay constant under unchanging ambient temperature conditions.
If the pressure has a slight deviation due to great change in the ambient
temperature, perform the test again.
Step 3 If welding defects exist, locate and repair the leaks. If the pressure does not
change, exhaust nitrogen through the injection needle valves.
----End
3.11 Connecting Cables
3.11.1 Port for Connecting the Power Cable
Figure 3-44 shows the port layout on the electrical control box.
NetCol5000-A025 In-row Air Cooled Smart Cooling
Product
User Manual (300 mm Width) 3 Installation Guide
Issue 15 (2020-12-10) Copyright © Huawei Technologies Co., Ltd. 73
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