Install the manifold (in-rack system)

Use this information to install the manifold in an in-rack direct water cooling system.

About this task

Important

This task must be operated by trained technicians that are certified by Lenovo Service. Do not attempt to remove or install the part without proper training and qualification.

CAUTION

The coolant might cause irritation to the skin and eyes. Avoid direct contact with the coolant.

S002

CAUTION

The power-control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.

S011

CAUTION

Sharp edges, corners, or joints nearby.

S038

CAUTION

Eye protection should be worn for this procedure.

S040

CAUTION

Protective gloves should be worn for this procedure.

Attention

• Read Installation Guidelines and Safety inspection checklist to ensure that you work safely.

• Power off the server and peripheral devices and disconnect the power cords and all external cables. See Power off the server.

• Prevent exposure to static electricity, which might lead to system halt and loss of data, by keeping static-sensitive components in their static-protective packages until installation, and handling these devices with an electrostatic-discharge wrist strap or other grounding system.

• Ensure proper handling procedures are followed when working with any chemically treated coolant used in the rack cooling system. Ensure that material safety data sheets (MSDS) and safety information are provided by the coolant chemical treatment supplier and that proper personal protective equipment (PPE) is available as recommended by the coolant chemical treatment supplier. Protective gloves and eyewear may be recommended as a precaution.

• This task requires two or more people.

Procedure

1. Make sure that the in-rack CDU and other devices are not powered on, and that all external cables are disconnected.
2. To install the Direct Water Cooling Module (DWCM), see Install the Lenovo Neptune(TM) Processor Direct Water Cooling Module.
3. To install the GPU water loop, see GPU water loop replacement (trained technician only).
4. To install the server into the rack, see Install the server to rack.
5. Install the manifold.
   Figure 1. Installing the manifold
   

   

   
   
   1. Hold the manifold with both hands, and mount it onto the rack cabinet.
   2. Align the spools with holes, and clutch the cabinet.
   Note

   For more information about the rack cabinet, see ThinkSystem Heavy Duty Full Depth Rack Cabinets User Guide.
6. Repeat step 4 to the other manifold.
7. Install ball valves to CDU.
   Figure 2. Installing ball valves
   

   

   
   
   1. Connect the ball valves to Supply and Return ports.
   2. Wrap the interface around with the clamp.
   3. Close the clamp.
   4. Lift the screw upright.
   5. Tighten the screw and make sure that it is secured.
8. Install the connection set to manifolds.
   Figure 3. Installing the connection set
   

   

   
   

   1 17 mm wrench

   1. Connect the connection set to both manifolds.
   2. Wrap the interface around with the clamp.
   3. Close the clamp.
   4. Lift the screw upright.
   5. Tighten the screw and make sure that it is secured.
9. Install the connection set to ball valves.
   Figure 4. Connecting ball valves
   

   

   
   
   1. Connect ball valves.
   2. Rotate to the right to lock the two valves.
10. Prepare the in-rack CDU.
    1. Connect the feed hose to inlet port on the front.
       Figure 5. The front of CDU
       

       

       
       
    2. Connect hoses to the drain port and bleeder port on the rear.
       Figure 6. The rear of CDU
       

       

       
       

       • Connect both drain and bleeder hoses to CDU.
       • Rotate the connectors to the right to secure the connection.

       Important

       • For more operation and maintenance guidelines, see Lenovo Neptune DWC RM100 in-rack Coolant Distribution Unit (CDU) Operation & Maintenance Guide.

       • For service support, associated warranty and maintenance sizing, contact Lenovo Professional Services team at:

         cdusupport@lenovo.com
         

11. Install the quick connect plug to the manifolds.
    Figure 7. Installing the quick connect plug
    

    

    
    
    1. Remove the rubber quick connect plug covers from the ports on the manifold.
    2. Connect the plug to the manifold port.
12. Install the bleeder kit to the manifold supply side.
    Figure 8. Installing the bleeder kit to the supply side
    

    

    
    
    1. Remove the rubber quick connect plug covers from the ports on the manifold.
    2. Plug the bleeder kit to the manifold.
13. To push the air out of the manifolds, open ball valve switches to let coolant fill the system.
    Figure 9. Opening ball valves
    

    

    
    
    1. Press the button on the ball valve switch.
    2. Rotate the switch to fully open the valves as illustrated above.
    Attention

    • Pay close attention to the front display of CDU and maintain the system pressure at one bar.

    • For more information about coolant temperature and system pressure requirements, see Water requirements.

14. Slowly open the bleeder valve to conduct the air out of the hose. Close the bleeder valve once a steady stream of water flows into the bucket or there are only minimal bubbles in the bleeder hose.
    Figure 10. Opening the bleeder valve on the supply side
    

    

    
    
15. Install the bleeder kit to the manifold return side.
    Figure 11. Installing the bleeder kit on the return side
    

    

    
    
    1. Remove the rubber quick connect plug covers from the ports on the manifold.
    2. Plug the bleeder kit to the manifold.
16. Slowly open the bleeder valve to conduct the air out of the hose. Close the bleeder valve once a steady stream of water flows into the bucket or there are only minimal bubbles in the bleeder hose.
    Figure 12. Opening the bleeder valve on the return side
    

    

    
    
17. (For precaution) To make sure that the air inside is as little as possible, re-install the bleeder kit back to manifold supply side and do it one more time. Close the bleeder valve once a steady stream of water flows into the bucket or there are only minimal bubbles in the bleeder hose.
    Figure 13. Opening the bleeder valve on the supply side
    

    

    
    
18. Once completed, pay close attention to the front display of CDU and maintain the system pressure at one bar. For more information about coolant temperature and system pressure requirements, see Water requirements.