Figure 4-76 Bottom routing of the water inlet pipe
When routing pipes from the top, do not route the pipes over servers or other
devices to protect them from being
aected by pipe leaks.
----End
4.8.9 Leakage Test with Nitrogen for Refrigerant Pipes
Prerequisites
● Refrigerant pipes have been welded.
● The needle valve plugs are tightened.
● The measuring range of a pressure gauge must be at least 4.0 MPa, and the
rubber hose must withstand a pressure of at least 4.5 MPa.
● Only nitrogen can be used for pressure preservation and leakage detection.
● During pressure preservation, do not remove the rubber hoses and pressure
gauges; otherwise, nitrogen may leak.
● When an air-cooled outdoor unit or a water cooling module is connected to the
outdoor side, perform the same operations on the refrigerant side for nitrogen
injection and pressure preservation.
Procedure
Step 1 Connect the rubber hoses, pressure gauges, reducing valve, and nitrogen cylinder
to the device. The pressure gauges and reducing valve are closed.
● If no low temperature component is installed on the outdoor side, connect
pipes as shown in Figure 4-77, and charge nitrogen into the system from the
low-pressure and exhaust pipe needle valves simultaneously.
NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual 4 Installation
Issue 08 (2021-09-17) Copyright © Huawei Technologies Co., Ltd. 99
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