Exhausting Nitrogen - Huawei NetCol8000-A Series User Manual

NetCol8000-A(050, 100) In-room Air Cooled Smart
Cooling Product
User Manual

3.5.1 Exhausting Nitrogen

Prerequisites
Before exhausting nitrogen, check whether the cooling system has good air
tightness. (Remove the bonnet from the needle valve and press the valve plug to
check whether there is a sound of air flow.)
Context
Before connecting refrigerant pipes, exhaust nitrogen used for avoiding explosion
and injury.
Procedure
Step 1 Open the bonnet on the needle valve, connect the hose end with an ejector to the
needle valve, and expel nitrogen.
Figure 3-31 Position for exhausting nitrogen without configuring low-temperature
component
(1) Low pressure needle valve
Issue 12 (2020-10-28)
NO TICE
D ANGER
Copyright © Huawei Technologies Co., Ltd.
(2) High pressure needle valve
3 Installation Guide
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