Huawei NetCol5000-A050 User Manual page 110

NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual
●
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.
Issue 08 (2021-09-17)
Figure 4-77 Charging nitrogen to pipes without a low temperature
component
(1) Nitrogen cylinder
(4) High pressure gauge
If a low temperature component is installed on the outdoor side, connect
pipes as shown in Figure
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
(4) Pressure gauge 2
(7) Exhaust pipe needle valve (8) Liquid pipe needle valve
Copyright © Huawei Technologies Co., Ltd.
(2) Reducing valve
(5) Low-pressure needle
valve
4-78, and charge nitrogen into the system from the
(2) Reducing valve
(5) Connection nut
4 Installation
(3) Low pressure gauge
(6) Exhaust pipe needle valve
(3) Pressure gauge 1
(6) Low-pressure needle
valve
100