Notices For Laying Pipes - Huawei NetCol5000-A050 User Manual

NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual

4.8.1 Notices for Laying Pipes

● When connecting the indoor and outdoor units, you are advised to weld pipes
to the outdoor unit first. Seal the pipe after welding if the welding break
exceeds 15 minutes to prevent dust and moisture from entering the pipe.
● Take protective measures, such as spreading a piece of wet cloth, around the
welding position, to avoid burning the bottom panel, top panel, side panel,
internal components, needle valves, other pipes, thermal insulation foam,
power cables, labels, and tags.
● During the welding, avoid exposing the refrigerant pipes for over 15 minutes.
Otherwise, system reliability is affected.
● To avoid leakage of ventilation channels and damage to copper pipes, seal the
holes after the pipes are routed through the bottom panel. Seal the top of the
copper pipes to prevent foreign matter from entering the refrigerant pipes.
● After welding copper pipes that are excessively long or with bends, blow
nitrogen into the pipes to clean foreign matter so that other components will
not be affected.
● Wrap the refrigerant pipes with thermal insulation foam.
● Avoid elbows and ensure that the connection between the indoor and outdoor
units is the shortest.
When selecting the refrigerant pipes, note the following:
1.
2.
3.
4.
5.
Issue 08 (2021-09-17)
NO TICE
Avoid elbows and ensure that the connection between the indoor and
outdoor units is the shortest.
After determining the best pipe route between the indoor and outdoor units,
calculate the number of the components that cause local resistance loss, for
example, elbows, and convert them into the equivalent length to straight
pipes.
The total length of pipes connecting the indoor and outdoor units equals to
the equivalent length of the straight pipes plus the length of the straight
pipes connecting the indoor and outdoor units.
You are advised to select the pipes based on the total length of the pipes
connecting the indoor and outdoor units, because different pipe diameters
influence the voltage drop and performance of the cooling system.
Pipe length mentioned in this document is equivalent.
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