Figure 3-31 Positions of needle valves
(1) Liquid pipe needle valve (2) Discharge pipe needle
valve
(3) Low-pressure needle valve
Procedure
Step 1 Remove the bonnets of the liquid pipe needle valve, low-pressure needle valve,
and discharge pipe need valve in turn, as shown in Figure 3-31.
You will hear a sound of strong air ow when air is being exhausted.
Step 2 Connect a hose to the liquid pipe needle valve, low-pressure needle valve, and
discharge pipe need valve in turn to slowly exhaust nitrogen.
Step 3 Reinstall the valve bonnets until no air exhausts from the needle valves.
----End
3.10 Connecting Pipes
3.10.1 Connecting Refrigerant Pipes
NetCol5000-A025 In-row Air Cooled Smart Cooling
Product
User Manual (300 mm Width) 3 Installation Guide
Issue 15 (2020-12-10) Copyright © Huawei Technologies Co., Ltd. 60
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