Huawei NetCol5000-A050 User Manual page 93

NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual (1350 mm Depth)
No.
3
4
Step 3 Weld the pipes.
● 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 4-46 Welding
The following describes how to weld refrigerant pipes if pipes are routed from the
bottom of the indoor unit. Welding other refrigerant pipes does not involve
removing the bottom plate of the cabinet and handling holes.
1.
2.
3.
4.
5.
6.
Issue 04 (2022-12-15)
Name
Drainpipe
Humidifier water inlet
pipe
NO TICE
NO TICE
Remove the bottom plate from the cabinet.
Use a welding torch to remove the plugs at the refrigerant pipe ends.
Use a utility knife to cut a cross in the rubber ring, wrap the pipe with
thermal insulation foam, route the pipe through the hole.
Weld the pipes.
Wrap thermal insulation foam around the pipe.
Seal the cable hole using firestop putty.
Copyright © Huawei Digital Power Technologies Co., Ltd.
Description
Connecting to the drainage system
With a wet film humidifier: connecting to the
engineering pipe
4 System Installation
83