Install the Lenovo Neptune(TM) Processor Direct Water Cooling Module

Follow the instructions in this section to install the Direct Water Cooling Module (DWCM). The procedure must be executed by a trained technician.

About this task

S011

CAUTION

Sharp edges, corners, or joints nearby.

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.

CAUTION

When removing a new DWCM from the shipping box, lift out the cold plate assembly with the shipping tray attached to prevent thermal grease on the cold plate assembly from damage.

Prepare the following screwdrivers to ensure you can install and remove the corresponding screws properly.

Torque screwdriver type list	Screw Type
Torx T30 head screwdriver	Torx T30 screw

Procedure

1. If you are replacing a processor and reusing the cold plate.
   1. Remove the processor identification label from the cold plate and replace it with the new label that comes with the replacement processor.
   2. If there is any old thermal grease on the cold plate, wipe the thermal grease from the bottom of the cold plate with an alcohol cleaning pad.
2. If you are replacing the cold plate and reusing the processor.
   1. Remove the processor identification label from the old cold plate and place it on the new cold plate in the same location.
      Note

      If you are unable to remove the label and place it on the new cold plate, or if the label is damaged during transfer, write the processor serial number from the processor identification label on the new cold plate in the same location as the label would be placed using a permanent marker.
   2. Install processor in new carrier.
      1. Make sure the handle on the carrier is in the closed position.
      2. Align the processor on the new carrier so that the triangular marks align; then, insert the marked end of the processor into the carrier.
      3. Hold the inserted end of the processor in place; then, pivot the unmarked end of the carrier down and away from the processor.
      4. Press the processor and secure the unmarked end under the clip on the carrier.
      5. Carefully pivot the sides of the carrier down and away from the processor.
      6. Press the processor and secure the sides under the clips on the carrier.
         Note

         To prevent the processor from falling out of the carrier, keep the processor-contact side up and hold the processor-carrier assembly by the sides of the carrier.
         Figure 1. Processor carrier installation
         
         
3. Apply thermal grease.
   • If you are replacing the heat sink and reusing the processor, a new heat sink comes with thermal grease and you do not need to apply new thermal grease.
     Note

     To ensure the best performance, check the manufacturing date on the new heat sink and make sure it does not exceed two years. Otherwise, wipe off the existing thermal grease and apply new thermal grease.
   • If you are replacing the processor and reusing the heat sink, do the following steps to apply thermal grease:
     1. If there is any old thermal grease on the heat sink, wipe off the thermal grease with an alcohol cleaning pad.
     2. Carefully place the processor and carrier in the shipping tray with the processor-contact side down. Make sure the triangular mark on the carrier is oriented in the shipping tray as shown below.
     3. Apply the thermal grease on the top of the processor with syringe by forming four uniformly spaced dots, while each dot consists of about 0.1 ml of thermal grease.
        Figure 2. Thermal grease application with processor in shipping tray
        
        
4. Align the triangular marks on the processor retainers with the triangular slots on the underside of the cold plate; then, attach the processors to the underside of the cold plate by inserting the processor retainer posts and clips features into the openings at the four corners of the cold plate.
   Figure 3. Assembling the processor with cold plate
   
   

   Figure 4. Inspecting the processor with cold plate
   
   
5. Install the processor-DWCM to the system board assembly.
   1. Rotate the anti-tilt wire bails inward.
   2. Align the triangular mark and four Torx T30 nuts on the cold plate assembly with the triangular mark and threaded posts of the processor socket; then, insert the cold plate assembly into the processor socket.
   3. Rotate the anti-tilt wire bails outward until they engage with the hooks in the socket.
   4. Fully tighten the Torx T30 nuts in the installation sequence shown on the cold plate assembly. Tighten the screws until they stop; then, visually inspect to make sure that there is no gap between the screw shoulder beneath the cold plate assembly and the processor socket. (For reference, the torque required for the fasteners to fully tighten is 1.1±0.2 newton-meters, 10±2.0 inch-pounds.)
      Figure 5. Installing the processor-DWCM
      
      
6. If applicable, remove the module handle from the DWCM.
   1. Rotate the screws as illustrated above to unlock the handle.
   2. Separate the handle from the DWCM.
      Figure 6. Removing the module handle
      
      
      Note

      A new DWCM comes with a handle.

      1. To replace an old DWCM with a new one, remove the handle of the new one as illustrated above.

      2. To replace processors without changing the DWCM, a handle is not needed. Skip this step and proceed with further installation.

7. Install the cold plate covers. Press the cover down as illustrated.
   Figure 7. Installing cold plate covers
   
   

   Note

   • Ensure the cold plate cover matches the corresponding CPU number.
   • Install the memory modules that were removed to their original slots.
8. Install the hoses.
   1. Install the hoses to the hose clips and holders.
      Figure 8. Installing the hoses and module
      
      

      Note

      For leakage sensor module working status, see Leakage sensor module LED.

   2. Install the first hose through the hose opening on the chassis as illustrated.
      Figure 9. Installing the hose
      
      
   3. Place the hose holder under the first hose; then, install the hose holder into position by sliding it towards the hose opening on the chassis.
      Figure 10. Installing the hose holder
      
      
   4. Install the second hose through the hose opening on the chassis as illustrated.
      Figure 11. Installing the hose
      
      
   5. Fasten the two M3 screws (PH2, 2 x M3, 0.5 newton-meters, 4.3 inch-pounds) to secure the hose holder in place.
      Figure 12. Securing the hose holder
      
      
9. Install the hose cover.
   1. Install the hose cover by placing it on top of the hoses; then, slide it towards the hose opening until it is in place.
   2. Fasten the three M3 screws (PH2, 3 x M3, 0.5 newton-meters, 4.3 inch-pounds) to secure the hose cover to the chassis.
   Figure 13. Installing the hose cover
   
   
10. Install the leakage sensor module bracket. Refer to Install the leakage sensor module bracket for leakage sensor module bracket installation with different configurations.
    1. Align the leakage sensor module bracket to the slot on the chassis; then, insert the bracket into the slot.
    2. Fasten the four M3 screws (PH2, 4 x M3, 0.5 newton-meters, 4.3 inch-pounds) to secure the leakage sensor module bracket to the chassis.
    Figure 14. Installing the leakage sensor module bracket
    
    
11. Install the leakage sensor module to the sensor module holder.
    Figure 15. Installing the leakage sensor module