Remove the water loop

Use this information to remove the water loop.

About this task

Required tools

• Screwdriver for PH 1, PH 2, T10, T20, and T30 screws

• Waterloop Service Kit (SC750 V4) (The water loop carrier in the Service Kit is reusable, it is recommended to keep it at the facility where the server operates for future replacement needs.)

• Up VR Gap Pad Kit (SC750 V4)

• MID E3.S TOP Gap Pad (SC750 V4) , if E3.S middle drive is installed.

• MID E3.S BOT Gap Pad (SC750 V4) , if E3.S middle drive is installed.

• Storage Gap Pad Kit (SC750 V4) , if E3.S front drive is installed.

• Storage Gap Pad Kit (SC750 V4) , if E3.S 1T dual front drives or E3.S 2T single front drive are installed.

• CX7 NDR200 Gap Pad (SC750 V4) , if ConnectX-7 NDR 200 adapter is installed.

• CX7 Gap Pad (SC750 V4) , if ConnectX-7 NDR 400 adapter is installed.

S038

CAUTION

Eye protection should be worn for this procedure.

S040

CAUTION

Protective gloves should be worn for this procedure.

S042

DANGER

danger

Risk of electric shock due to water or a water solution which is present in this product. Avoid working on or near energized equipment with wet hands or when spilled water is present.

Attention

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

• Turn off the corresponding DWC tray that you are going to perform the task on.

• Disconnect all external cables from the enclosure.

• Use extra force to disconnect QSFP cables if they are connected to the solution.

• To avoid damaging the water loop, always use the water loop carrier when removing, installing or folding the water loop.

• A torque screwdriver is available for request if you do not have one at hand.

Watch the procedure

• A video of this procedure is available at YouTube.

Procedure

1. Make preparations for this task.
   1. Remove the tray from the enclosure. See Remove a tray from the enclosure.
   2. Remove the tray cover. See Remove the tray cover.
   3. If DIMM comb is installed, remove it. See Remove a DIMM comb.
   4. Remove the memory module, perform one of the following.

      • Remove memory modules that require single-side cooling. See Remove a memory module (single-side cooling).

      • Remove memory modules that require dual-side cooling. See Remove a memory module (dual-side cooling).

   5. Remove the cross braces. See Remove the cross braces.
   6. If DIMM cooling bars are installed, remove them. See Remove a DIMM cooling bar.
   7. Remove the front E3.S drive cage. see Remove an E3.S front drive cage assembly.
   8. Remove the PCIe adapter riser assembly. See Remove a ConnectX-7 NDR 200 adapter riser assembly or Remove a ConnectX-7 NDR 400 adapter riser assembly.
   9. Remove the middle E3.S drive cage. see Remove an E3.S middle drive cage assembly.
   10. Remove the sideband cable kit. See Remove the system management sideband cable kit.
   11. Remove the leakage sensor module. See Remove the leakage sensor.
2. Remove the four PH1 screws to remove the middle drive cold plates from the water loop. Use a torque screwdriver set to the proper torque.
   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.

   • There are two middle drive cold plates per node, and a total of four cold plates per tray. Make sure to remove all four cold plates from the water loop.

   Figure 1. Removing middle drive cold plate
   
   
3. Remove the two T10 screws to remove the VR cover with a torque screwdriver set to the proper torque. Make sure to remove two VR covers from the water loop (one VR cover per 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 2. Removing the VR covers
   
   
4. Remove eight (8x) Torx T10 screws to remove the two quick connects (four screws for each quick connect). Use a torque screwdriver set to the proper torque.
   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 3. Removing quick connect screws
   
   
5. Remove four Torx T10 screws to remove the mixing chambers from the power distribution board cold plate with a torque screwdriver set to the proper torque.
   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 4. Installing mixing chamber screws
   
   
6. Remove water loop screws (18x Torx T10 screws per node) with a torque screwdriver set to the proper torque.
   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 5. Water loop screws removal
   
   
7. Loosen processors properly.
   1. Fully loosen all Torx T30 captive screws on cold plates (16x Torx T30 captive screws for two nodes) following the screw sequence label on the shipping bracket, with a torque screwdriver set to the proper torque.
      Note

      • For reference, the torque required for the screws to be fully tightened/removed is 8+/- 0.5 lbf-in, 0.9+/- 0.05 N-m.

      • To prevent damage to components, make sure that you follow the indicated tightening/loosening sequence.

      Figure 6. Screw tightening/loosening sequence on the shipping bracket label
      
      
   2. Rotate all anti-tilt wire bails (16x anti-tilt wire bails for two nodes) inwards to the unlocked position.
   Figure 7. Loosening Torx T30 captive screws
   
   
8. Orient two water loop carriers with the guide pins; then, gently put the two water loop carriers down and ensure they are seated firmly on the water loop.
   Figure 8. Installing water loop carrier
   
   
9. Install water loop carrier screws (28x Phillips #2 screws for two nodes) with a torque screwdriver set to the proper torque.
   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 9. Installing water loop carrier screws
   
   
10. Align the support plate with the two guide pins on the shipping bracket; then, place the support plate on the shipping bracket on the right-side node.
    Figure 10. Installing the support plate on the shipping bracket on the right-side node
    
    
11. Carefully rotate the water loop so one half is sitting on top of the other half.
    Figure 11. Folding water loop
    
    
12. Install six T20 screws to fasten the support plate to the left-side water loop.
    Figure 12. Installing support plate to the left-side water loop
    
    
13. Fasten two captive thumbscrews to secure water loop carriers to each other.
    Figure 13. Fastening captive thumbscrews
    
    
14. Remove the processor from the retainer.
    1. Lift the handle to release the processor from the retainer.
    2. Carefully hold the processor by its edges; then, lift the processor from the retainer.
       Note

       Do not touch the contacts on the processor.

       Figure 14. Processor removal
       
       
15. Without putting the processor down, wipe the thermal grease from the top of the processor with an alcohol cleaning pad; then, place the processor on a static protective surface with the processor-contact side up.
16. Remove the processor retainer from the underside of the cold plate.
    Note

    The processor retainer will be discarded and replaced with a new one.
    1. Carefully release the retaining clips from the cold plate.
    2. Lift the retainer from the cold plate.
    Figure 15. Processor retainer removal
    
    
17. Wipe the thermal grease from the bottom of the cold plate with an alcohol cleaning pad.
18. Carefully lift the water loop up off the system board and out of the node.
    Figure 16. Water loop removal
    
    
19. Place the water loop into the package box.; then, place it into the package box.
    1. Carefully hold the water loop with both hands and flip it.
    2. Place the water loop into the package box.
    Figure 17. Place the water loop into the package box
    
    
20. While the water loop is inside the package box, install six T20 screws to fasten the support plate to the right-side water loop.
    Figure 18. Installing support plate to right-side water loop
    
    
21. Fasten two captive thumbscrews to secure water loop carriers to each other.
    Figure 19. Fastening captive thumbscrews
    
    
22. Remove the processor from the retainer.
    1. Lift the handle to release the processor from the retainer.
    2. Carefully hold the processor by its edges; then, lift the processor from the retainer.
       Note

       Do not touch the contacts on the processor.

       Figure 20. Processor removal
       
       
23. Without putting the processor down, wipe the thermal grease from the top of the processor with an alcohol cleaning pad; then, place the processor on a static protective surface with the processor-contact side up.
24. Remove the processor retainer from the underside of the cold plate.
    Note

    The processor retainer will be discarded and replaced with a new one.
    1. Carefully release the retaining clips from the cold plate.
    2. Lift the retainer from the cold plate.
    Figure 21. Processor retainer removal
    
    
25. Wipe the thermal grease from the bottom of the cold plate with an alcohol cleaning pad.
26. Install the foam cover and plastic cover to the water loop.
    1. .Install the plastic cover to the water loop.
    2. Install the foam cover to the water loop
    Figure 22. Install protective covers to the water loop