NO TICE
● 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.
● When a low-temperature outdoor unit is configured, the stop valve of the
indoor unit 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
NO TICE
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 4-56 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.
FusionModule800 Smart Small Data Center
User Manual
4 Installation Guide
Issue 01 (2021-02-05)
Copyright © Huawei Technologies Co., Ltd.
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