Huawei NetCol5000-A050 User Manual page 89

NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual (1350 mm Depth)
No.
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Step 3 Weld the refrigerant pipes (gas pipe and liquid pipe).
● During welding, after the nitrogen cylinder is connected to the reducing valve,
connect one end of the rubber hose to the reducing valve and the other end to
the copper pipe and add 0.03–0.05 MPa nitrogen to the copper pipe for
preventing internal oxidation.
● When welding a gas pipe, gently inject nitrogen into the pipe through the
discharge pipe needle valve.
● When welding a liquid pipe, gently inject nitrogen into the pipe through the
liquid pipe needle valve.
Figure 4-37 Welding
1.
2.
3.
Issue 04 (2022-12-15)
Name
Gas pipe
Liquid pipe
Drainpipe
Humidifier water inlet
pipe
NO TICE
Use a welding torch to remove the plugs at the refrigerant pipe ends.
Weld the pipes.
Wrap thermal insulation foam around the pipe.
Copyright © Huawei Digital Power Technologies Co., Ltd.
Description
Connection relationship of gas pipe ports:
● Without a low temperature component:
Indoor unit > Outdoor unit
● With a low temperature component: Indoor
unit > Low temperature component >
Outdoor unit
Connection relationship of liquid pipe ports:
● Without a low temperature component:
Indoor unit > Outdoor unit
● With a low temperature component: Indoor
unit > Low temperature component >
Outdoor unit
Connecting to the drainage system
With a wet film humidifier: connecting to the
engineering pipe
4 System Installation
79