Vacuumizing And Precharging Refrigerant - Huawei FusionCol8000-E240 User Manual

FusionCol8000-E240 Modular Indirect Evaporative
Cooling System
User Manual
Figure 8-31 Injecting nitrogen to preserve the pressure
(1) Nitrogen cylinder
(4) High pressure gauge
The outlet pressure of the reducing valve should be within 3.0 MPa; otherwise,
components may be damaged.
Step 2 Open the pressure gauges and reducing valve. Inject 3.0 MPa nitrogen and
preserve the pressure for 24 hours. The system pressure should stay constant
under unchanging ambient temperature conditions. If there is considerable
temperature change, perform the test again.
The outlet pressure of the reducing valve should be within 3.0 MPa; otherwise,
components may be damaged.
Step 3 If the pressure decreases, apply soapy water or use a halogen leak detector to
check for any leakage. If the pressure is stable, expel the nitrogen.
----End

8.5.15.4 Vacuumizing and Precharging Refrigerant

During the commissioning of the smart cooling product, ensure that no
combustion-supporting materials (such as air or additive) enter the smart cooling
product system. Huawei is not liable for any risks and losses caused due to
violation.
Issue 02 (2021-04-15)
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(2) Reducing valve
(5) Low pressure needle valve
8 System Maintenance
(3) Low pressure gauge
(6) Liquid pipe needle valve
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