Ensure that the indoor temperature is always above 4°C during the leakage test
with water; otherwise, the pipes may experience frost cracks. If the indoor
temperature is below 0°C, take anti-freezing measures for the pipes.
Procedure
Step 1 Manually open the chilled water valve (100%).
Figure 4-86 Opening the chilled water valve
Step 2 Open the main water inlet valve for the water-cooled module.
Step 3 Gradually open the cooling water side needle valve. Air and chilled water ow out
of the needle valve together.
Step 4 Adjust the air exhausting speed until no bubble
ows out of the needle valve.
Step 5 Tighten the cooling water side needle valve.
Step 6 Inject water to 0.8 MPa, and preserve the pressure for 24 hours. Then connect a
pressure gauge to a needle valve on the pipeline to measure the pressure. If the
reading remains unchanged, the pipe is not leaking. You can perform the following
operations.
----End
4.11 Connecting Cables
4.11.1 Connecting the Equipotential Ground Cable
The following
gure shows the equipotential ground position.
NetCol8000-A(045, 055, 060, 090, 120) In-room Air
Cooled Smart Cooling Product
User Manual 4 System Installation
Issue 05 (2020-10-10) Copyright © Huawei Technologies Co., Ltd. 121
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