Figure 4-48 Open a stop valve plug
Step 3 Remove the needle valve bonnets at the gas pipe and liquid pipe of the indoor
unit, connect rubber hoses and pressure gauges to the needle valves on the gas
pipe and liquid pipe, and gently exhaust nitrogen, as shown in Figure 4-49.
When connecting the rubber hose, the pressure gauge valve should be closed.
When exhausting nitrogen, ensure that the rubber hose is secured. Otherwise,
personal injury will be caused as a result of the air current impact.
There should be a great sound of airow during the exhausting.
Figure 4-49 Exhausting nitrogen from an indoor unit
(1) Pressure gauge
(2) Gas pipe needle valve (3) Liquid pipe needle valve
When exhausting nitrogen, do not remove the valve plug in case of losing it.
FusionModule800 Smart Small Data Center
User Manual 4 Installation Guide
Issue 01 (2021-02-05) Copyright © Huawei Technologies Co., Ltd. 131
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