Leakage Test With Nitrogen For Refrigerant Pipes - Huawei NetCol5000-A050 User Manual

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

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-cooled 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.
●
Issue 13 (2023-08-20)
NO TICE
If no low temperature component is installed on the outdoor side, connect
pipes as shown in Figure
low-pressure and discharge pipe needle valves simultaneously.
Figure 4-77 Charging nitrogen to pipes without a low temperature
component
(1) Nitrogen cylinder
(4) High pressure gauge
Copyright © Huawei Digital Power Technologies Co., Ltd.
4-77, and charge nitrogen into the system from the
(2) Reducing valve
(5) Low-pressure needle
valve
4 Installation
(3) Low pressure gauge
(6) Discharge pipe needle
valve
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