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
4.9 Installing Cables
4.9.1 Cable Connection Precautions
● Check that the input power cable of the indoor unit has no reverse phase
sequence or open phase.
● Keep cables away from the compressor, fan, and copper pipe (if unavoidable,
take protective measures), and connect cables securely.
● The device must be grounded as required by local electrical regulations.
● Before connecting cables, remove the power cable protective cover.
● Cables must be routed in through the cable clips.
● Power cables and ground cables are routed and bundled separately from
other types of cables.
4.9.2 Installing the Equipotential Ground Cable
Figure 4-80 shows the equipotential ground position.
NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual 4 Installation
Issue 08 (2021-09-17) Copyright © Huawei Technologies Co., Ltd. 102
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