Huawei NetCol5000-A User Manual page 63

NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
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Figure 3-28 Welding pipes
Step 2 Cut a cross in the rubber ring using a utility knife and route the pipe wrapped with the thermal
insulation tube through the hole.
Ensure that the rubber ring is not disconnected. If the rubber ring is disconnected or damaged,
seal the gaps around the pipes with mastic cement or thermal insulation foam.
Step 3 Connect the gas and liquid pipes to the gas and liquid pipes of the outdoor unit respectively.
----End
Top Pipe Routing
When routing pipes from the top, do not route the pipes over servers. If unavoidable, take
measures to protect the servers from being affected by pipe leaks.
Step 1 Remove the plugs from the top refrigerant pipe using a welding torque, as shown in
3-29.
Issue 01 (2017-07-27)
Be careful during welding to avoid burning components, such as rubber rings, inside the
cabinet.
Use a rubber hose to connect the nitrogen cylinder which connecting the reducing valve
and the end of the copper pipe, then fill nitrogen at 0.03–0.05 MPa into the copper pipe to
avoid internal oxidation, as shown in
When welding a gas pipe, gently inject nitrogen into the pipe through the exhaust pipe
needle valve.
When welding a liquid pipe, gently inject nitrogen into the pipe through the liquid pipe
needle valve.
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Figure 3-28.
3 Installation Guide
Figure
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