Figure 4-77 Charging nitrogen to pipes without a low temperature
component
(1) Nitrogen cylinder (2) Reducing valve (3) Low pressure gauge
(4) High pressure gauge (5) Low-pressure needle
valve
(6) Exhaust pipe needle valve
● If a low temperature component is installed on the outdoor side, connect
pipes as shown in Figure 4-78, and charge nitrogen into the system from the
low-pressure, exhaust pipe, and liquid pipe needle valves simultaneously.
Figure 4-78 Charging nitrogen to pipes with a low temperature component
(1) Nitrogen cylinder
(2) Reducing valve (3) Pressure gauge 1
(4) Pressure gauge 2 (5) Connection nut (6) Low-pressure needle
valve
(7) Exhaust pipe needle valve (8) Liquid pipe needle valve
Step 2 Open the pressure gauges and reducing valve. Inject 3.0 MPa nitrogen and
preserve the pressure for 24 hours. The system pressure should stay constant
under unchanging ambient temperature conditions. If there is considerable
temperature change, perform the test again.
NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual 4 Installation
Issue 08 (2021-09-17) Copyright © Huawei Technologies Co., Ltd. 100
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