FusionModule800 Smart Small Data Center
Installation Guide (Six Fans)
3 Hardware Installation
Issue 10 (2019-12-20)
Copyright © Huawei Technologies Co., Ltd.
82
When connecting the indoor and outdoor units, seal the pipe after the welding break
exceeds 15 minutes to prevent dust and water from entering the pipe.
To avoid burning the bottom panel, top panel, side panel, internal components, other pipes,
thermal insulation foam, power cables, and labels, take protective measures, such as
spreading a piece of wet cloth, around the welding position.
During and after the welding, avoid exposing the refrigerant pipe for over 15 minutes
because this may influence the system reliability.
Take appropriate sealing and protective measures when routing welded pipes through
holes to prevent air channel leaks and copper pipe damage. Otherwise, other components
may be damaged by impurities.
Avoid elbows and ensure that the connection between the indoor and outdoor units is the
shortest.
The refrigerant pipe should be wrapped with thermal insulation foam.
Procedure
Step 1
Route pipes based on the engineering requirements and weld pipes in the medium segment by
referring to
Exercise caution during welding to avoid burning components, such as rubber rings, inside the
cabinet.
During the welding, charge a little nitrogen into the pipes to avoid internal oxidation, as
shown in
When welding a gas pipe, gently inject nitrogen into the pipe at the gas pipe needle valve.
When welding a liquid pipe, gently inject nitrogen into the pipe at the liquid pipe needle
valve.
Figure 3-60
Welding pipes
When the direction of the refrigerant pipe is changed, add a support at the position that is
500 mm away from the changing point.
If the refrigerant pipe is straight, add a support every 1500 mm.
