Optional) Performing A Leakage Test With Nitrogen - Huawei NetCol5000-C Series User Manual

NetCol5000-C(065, 080) In-row Chilled Water Smart
Cooling Product
User Manual

3.9 (Optional) Performing a Leakage Test with Nitrogen

Prerequisites
You can decide whether a leakage test with nitrogen needs to be performed or not based on
the site situation.
Pipes have been properly connected.
Procedure
Step 1 Manually turn the chilled water valve to the maximum (100%), as shown in
Step 2 Connect a reducing valve, pressure gauge, and nitrogen cylinder to any needle valve of the
smart cooling product, as shown in
reach 0.8 MPa after it is stabilized), and keep it for 24 hours.
Figure 3-26 Injecting nitrogen
Step 3 After 24 hours, if the pressure drop is less than 0.01 MPa, the pipes do not leak. Open the
exhaust valve using a screwdriver, and close the valve when there is no airflow through the
valve. Then you can perform the following operations.
Step 4 After the leakage test has been performed and gas has drained, re-wrap the needle valve with
thermal insulation foam.
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Exception Handling
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Issue 07 (2020-03-16)
If the pressure decreases, find out and repair the leakage point by using soap bubbles.
If the pressure is preserved properly, exhaust nitrogen and wrap pipes and joints with
thermal insulation foams.
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Figure 3-26. Inject 0.8 MPa nitrogen (the pressure should
3 Installation
Figure 3-14.
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