Install the water loop

Use this information to install the water loop in SD650-I V3 tray.

Procedure

1. Follow the following steps if you are replacing processors:
   1. If there is any old thermal grease on the processor and the cold plate, gently clean the top of the processor and the cold plate using an alcohol cleaning pad.
   2. Remove the processor identification label from the water loop and replace it with the new label that comes with the replacement processor. If you are unable to remove the label and place it on the new water loop, or if the label is damaged during transfer, write the processor serial number from the processor identification label on the new water loop in the same location as the label would be placed using a permanent marker.
   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
      Note

      Carefully place the processor and retainer on a flat surface with the processor-contact side down.

      Figure 1. Thermal grease application
      
      
2. Install processor retainers onto processor if needed.
   1. Align the triangular mark on the processor retainer with the triangular mark on the processor corner edge.
   2. (Intel® Xeon® CPU Max only) Make sure the slot on the TIM breaking cam is vertical. See Figure 4.
   3. Gently place the processor retainer on the processor; then, carefully press the four sides of the processor retainer to secure the processor.

      Figure 2. Installing a processor retainer

      Figure 3. Installing a Intel® Xeon® CPU Max processor retainer 1 TIM breaking cam

   4. (Intel® Xeon® CPU Max only) After installing the retainer onto processor, make sure the slot on the TIM breaking cam is vertical.
      Figure 4. TIM breaking cam on processor retainer

      1 TIM breaking cam

      
      
      
3. When removing the water loop from the package box, make sure to hold the touch points marked in grey in the illustration below.
   Attention

   Holding the water loop anywhere other than the touch points may cause damage to it.

   Figure 5. Touching points when removing water loop from package box

   Top image	Isometric view of water loop
   Bottom image	Top view of the water loop

   
   
   
4. Remove two plastic grease covers if needed.
   1. Use a pair of scissors to cut off the tape.
   2. Remove plastic grease covers from the underside of water loop cold plates.
   Note

   The right node is shown as example. Remove plastic grease covers if needed when installing processor in either node.

   Figure 6. Plastic grease covers removal
   
   
5. Align the triangular marks on the processor retainers with the triangular slots on the underside of the water loop cold plate; then, attach the processors to the underside of the water loop cold plate by inserting the processor retainer posts and clips features into the openings at the four corners of the cold plate.
   Figure 7. Processor installation
   
   
6. Rotate all anti-tilt wire bails (8x anti-tilt wire bails per node) outwards to the unlocked position.
   Figure 8. Processor unlocked position
   
   
7. Check the gap pads on the water loop, if any of them are damaged or detached, replace them with the new ones.
   Figure 9. Water loop gap pads
   
   
8. Check the gap pads on the water loop, if any of them are damaged or detached, replace them with new ones. Make sure to follow Gap pad/putty pad replacement guidelines.
   Figure 10. Gap pad locations
   
   
9. Replace the putty pads on the water loop with new ones. Make sure to follow Gap pad/putty pad replacement guidelines.
   Note

   When attaching the putty pads on GPU cold plate, align the putty pads with the markings on the GPU cold plate.

   Figure 11. Putty pad locations
   
   
10. Fully loosen two captive thumbscrews located at each end of the water loop carrier.
    Figure 12. Loosening captive thumbscrews
    
    
11. Install the one side of the water loop.
    1. Carefully hold the water loop and flip it.
    2. Carefully position the water loop onto the two guide pins near the rear of the node; then, gently lower down the water loop and ensure it is seated firmly on the system board.
    Figure 13. Water loop carrier installation
    
    
12. If there is any old thermal grease on four GPU OAMs and the cold plates, gently clean the top of the four GPU OAMs and the cold plates using an alcohol cleaning pad.
13. Apply the thermal grease on the top of the four GPU OAMs with syringe by forming four dots spaced as shown, while each dot consists of about 0.15 ml of thermal grease.
    Figure 14. Thermal grease application
    
    
14. Remove all plastic grease covers from underside of water loop cold plates.
    Figure 15. Plastic grease covers removal
    
    
15. Fully loosen two captive thumbscrews located at each end of the water loop carrier.
    Figure 16. Loosening captive thumbscrews
    
    
16. Unfold and install the other side of the water loop as shown.
    Figure 17. Unfolding water loop
    
    
17. Ensure the processors are secured properly.

    1. Rotate anti-tilt wire bails (8x anti-tilt wire bails) outwards to the locked position.

    2. Fully tighten all Torx T30 captive screws (8x Torx T30 captive screws) on cold plates in the installation sequence shown on the cold plate label (with a torque screwdriver set to the proper torque).

       Note

       For reference, the torque required for the screws to be fully tightened/removed is 10+/- 2.0 lbf-in, 1.1+/- 0.2 N-m.
       Attention

       To prevent damage to components, make sure that you follow the indicated tightening sequence.
       Figure 18. Securing Torx T30 captive screws
       
       
18. Loosen water loop carrier screws (31x Phillips #2 screws for two nodes).
    Figure 19. Loosening water loop carrier screws
    
    
19. Carefully lift each water loop carrier up and away from the water loop one at a time.
    Figure 20. Water loop carrier removal
    
    
20. Install water loop screws with a torque screwdriver sets to the proper torque.

    • 14 Torx T10 screws in GPU node.

    • 9 Torx T10 screws in compute node.

    Note

    For reference, the torque required for the screws to be fully tightened/removed is 5.0+/- 0.5 lbf-in, 0.55+/- 0.05 N-M.

    Figure 21. Water loop screws installation
    
    
21. Install the following screws to secure the quick connect.

    • Four Torx T10 screws to loosen the quick connect.

    • Nine Torx T10 screws on the rear of the node.

    Figure 22. Quick connect screw installation
    
    
22. Install the GPU OAM cold plate screws (16x Torx 15 screws).
    Figure 23. GPU OAM cold plate screw installation
    
    
    1. Push down the GPU OAM cold plate with your palm to reduce the gap between the GPU OAM cold plate and the GPU OAM.
    2. Press the torque screwdriver against the screw so that the screw is engaged with the GPU OAM.
    3. Follow the screw sequence specified on the GPU OAM cold plate label, and fasten each screw for 720 degrees with a torque screwdriver set to the proper torque and rpm.
       Note

       For reference, the torque required for the screws to be fully tightened/removed is 0.9 +/-0.06 newton-meters, 8+/- 0.5 inch-pounds. The rpm setting is 200 rpm low-speed.

       Figure 24. Fastening GPU OAM cold plate screws for 720 degrees
       
       
    4. Make sure that the GPU OAM cold plate is lowered into the node and its surface is flat without tilting. If the GPU OAM cold plate is tilted, unfasten the screws, and repeat Step 1 to Step 3.
    5. Repeat Step 3 until the screws are fully tightened.
    6. Make sure the height of each screw is 11.5±0.3 millimeter (0.45±0.01 inch) and is fully compressed. If not, repeat the GPU OAM cold plate installation steps.
       Figure 25. Height of properly installed GPU OAM cold plate screw
       
       
23. Install VR clamp plate into the node and install two Torx T10 screws.
    Figure 26. VR clamp plate installation