Injecting Nitrogen - Huawei NetCol5000-C User Manual

NetCol5000-C Chilled Water-Cooled In-Row Precision
Air Conditioner
User Manual
Step 3 Install the hoop and wrap the water pipes with insulation cotton.
Figure 3-21 Connecting the water inlet or outlet pipes
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3.12.5 Injecting Nitrogen

Prerequisites
Injecting nitrogen required after pipes of the NetCol5000-C are connected.
Procedure
Step 1 Close the air exhaust valve of the NetCol5000-C.
Step 2 Connect any needle valve of a NetCol5000-C to the pressure gauge and blow 0.8 MPa
nitrogen to other needle valves of the NetCol5000-C.
Step 3 After 24 hours, check if the pressure decreased is less than 0.01 MPa, if yes, the pipes do not
leak.
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Issue 02 (2013-12-10)
 When connecting the water pipes, apply lubricant, such as soap water around the water pipe adaptor.

Before wrapping the water pipe with insulation cotton, hold one end of the insulation cotton and
pour soap water to the insulation cotton. Hold the other end of the insulation cotton, and shake the
insulation cotton back and forth to dump unnecessary soap water. Then wrap the water pipe with
insulation cotton.
 When wrapping the water pipes with insulation cotton, apply glue to the surface of joints evenly.
After the water pipes are wrapped with insulation cotton, press the joints at both sides by using your
thumb to ensure that the joints are securely connected. Apply glue to the two ends of the insulation
cotton to seal the pipe. The glue width at two ends must be greater than the thickness of the
insulation cotton.
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