Huawei NetCol5000-C030 Quick Manual page 7

4.4 Connecting the Chilled Water Inlet and Outlet Pipes
Aluminum plastic pipe
(1) Reserved
device port
(2) Direct
connection of
external teeth
(3) Sealing ring
(4) Nut
(5) Aluminum
plastic pipe
Connecting the Seamless steel pipe
(1) Reserved device
port
(2) Seamless steel
pipe
( Optional) Leakage Test with Nitrogen
4.5
•
If the pressure has fallen, apply soapy water on the pipes, especially pipe joints, to check for
leakages. Rectify the leakages if any.
•
If the pressure is stable, wrap all pipes and connectors with thermal insulation foam.
•
Install a reducing valve on the outlet of the nitrogen cylinder. Its outlet pressure must not
exceed 0.8 MPa.
•
In addition to the leakage test with nitrogen, there is the leakage test with water. You can
choose one test based on site requirements.
1. Rotate the chilled water valve to the maximum (100%).
2. Check that the needle and exhaust valves on the pipeline are closed.
3. Connect a reducing valve and a nitrogen cylinder at the needle valve position shown in the
figure, charge 0.8 MPa of nitrogen (when the pressure is stable), and leave them for 24
hours.
4. Check for pressure change after 24 hours.
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