Bottom Pipe Routing
Step 1 Use a welding torch to remove the plug at the lower end of the refrigerant pipe.
Figure 4-62 Bottom pipe routing
(1) Gas pipe (2) Liquid pipe
● Be careful during welding to avoid burning components, such as rubber rings,
inside the cabinet.
● Use a rubber hose to connect the nitrogen cylinder which connecting the
reducing valve and the end of the copper pipe, then
ll nitrogen at 0.03–0.05
MPa into the copper pipe to avoid internal oxidation, as shown in Figure 4-63.
● When welding a gas pipe, gently inject nitrogen into the pipe through the
exhaust pipe needle valve.
● When welding a liquid pipe, gently inject nitrogen into the pipe through the
liquid pipe needle valve.
Figure 4-63 Welding pipes
Step 2 Cut a cross in the rubber ring using a utility knife and route the pipe wrapped with
the thermal insulation foam through the hole.
NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual 4 Installation
Issue 08 (2021-09-17) Copyright © Huawei Technologies Co., Ltd. 89
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