Figure 3-36 Ports on the refrigerant pipes connecting the indoor unit and the
outdoor unit
(1) Needle valve
(2) Liquid pipe ball valve (inside diameter: 5/8
in)
(3) Discharge pipe ball valve (inside diameter:
7/8 in)
Precautions of welding pipes
NO TICE
While welding the refrigerant pipes, charge nitrogen from the nearest needle valve
(as shown by 1 in
) or from one port of middle pipes, as shown in
.
Figure 3-37 Charging nitrogen from one port of middle pipes
●
When welding the pipes, pay attention to the heat insulation cotton on the
pipes.
●
When welding the pipes, wrap the ball valve with a wet cloth to avoid
deformation of the seal washer due to high temperatures.
●
During the welding, avoid exposing the refrigerant pipes for over 15 minutes.
Otherwise, system reliability is influenced.
●
During the welding process, avoid burning the bottom plate and side panels,
especially the heat insulation cotton, labels, water pipes, and cables.
NetCol8000-A(050, 100) In-room Air Cooled Smart
Cooling Product
User Manual
3 Installation Guide
Issue 12 (2020-10-28)
Copyright © Huawei Technologies Co., Ltd.
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