Figure 4-56 Exhausting nitrogen
(1) Exhaust pipe needle valve (2) Low-pressure needle valve (3) Liquid pipe needle valve
Step 2 Open the pressure gauge valve. Loud noises of air ow are generated at rst and
then disappear gradually.
Step 3 After the air is exhausted, remove the pressure gauge and install the valve bonnet.
Step 4 Continue exhausting nitrogen from the exhaust pipe needle valve and liquid pipe
needle valve by performing Step 1–Step 3.
----End
Bottom Pipe Routing
Step 1 Remove the plugs from the bottom refrigerant pipe using a welding torque.
NetCol8000-A(045, 055, 060, 090, 120) In-room Air
Cooled Smart Cooling Product
User Manual 4 System Installation
Issue 05 (2020-10-10) Copyright © Huawei Technologies Co., Ltd. 100
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