Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document.
Note: Even the most advanced machine translation cannot match the quality of professional translators.
Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Checking Air Tightness of Manifold Pipes
Procedure
- Check whether the pressure of the nitrogen that is pre-filled in the manifold for pressure preservation is normal. (If the residual pressure is greater than or equal to 50% of the pre-filling pressure, the nitrogen pressure is normal. Otherwise, the nitrogen pressure is abnormal.)
- If yes, go to Installing the Liquid-Cooled Chassis.
- If no, perform the following steps to preserve the pressure of the manifold.
- Connect the inlet and outlet quick connecters of the manifold using a hose to connect the water inlet and outlet pipes of the manifold.Figure 3-43 Interconnection before pressurization
- Connect the pressure gauge of the manifold to the transfer pipe.Figure 3-44 Connecting the pressure gauge of the manifold to the transfer pipe
- Connect the quick connector of the manifold to the transfer pipe.Figure 3-45 Connecting the quick connector of the manifold to the transfer pipe
- Connect the air compressor to the needle valve on the pressure plug and increase the pressure by 600 kPa.
- Disconnect the air compressor, keep it still for 5 minutes, and read and record the pressure gauge value P1. After maintaining the pressure for 1 hour, read and record the pressure gauge value P2.
- Check whether the pressure drop ΔP exceeds 5 kPa (ΔP = P1 – P2).
- If yes, contact Huawei technical support.
- If no, go to 8.
- Open the exhaust valve on the manifold pipe to relieve pressure.
- Connect the manifold pipe to the secondary side pipe.
The red label indicates the water outlet pipe, and the blue label indicates the water inlet pipe.
Figure 3-46 Connecting the quick connector of the manifold to the secondary side pipe - Open the ball valve and connect the manifold pipe to the secondary side pipe.
