Huawei NetCol5000-A050 Quick Manual page 9

7.2
Discharging Nitrogen
Separately exhaust nitrogen from the three needle valves. Separately exhaust nitrogen from
the two needle valves for the water-cooled module. When exhausting nitrogen, do not
remove the valve plug in case of losing or damaging it.
7.3
Welding the Indoor Unit Ports
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.
Pipe support
Low-
pressure
needle
valve
Discharge
pipe needle
valve
Liquid pipe
needle
valve
9
Wall
Pipe