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Install the water loop

Use this information to install the water loop in the SD665 V3 tray.

About this task

Required tools

Make sure you have the required tools listed below in hand to properly replace the component.

  • SD665 V3 Water Loop Service Kit (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.)

  • SD665 V3 Water Loop Putty Pad Kit

  • VR Conduction Plate 12.4 (including washers)

  • VR 1.5mm Putty Pad

  • VR 2.5 mm Putty Pad

    Putty pad cannot be reused. Whenever the water loop is removed, putty pads must be replaced with new ones before reinstalling the water loop.

  • Drive gap pad or putty pad kits according to the drives installed in the tray. See their respective replacement procedures for more information.

  • ConnectX series adapter putty pad kits according to the ConnectX adapter installed in the tray. See their respective replacement procedures for more information.

  • Screws and screwdrivers

    Prepare the following screwdrivers to ensure you can install and remove corresponding screws properly.
    Screwdriver TypeScrew Type
    Torx T10 head screwdriverTorx T10 screw
    Torx T20 head screwdriverTorx T20 screw
    Phillips #2 head screwdriverPhillips #2 screw
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.

Important
Gap pad/putty pad replacement guidelines

  • To identify the gap pad/putty pad location and orientation, see:

  • Before replacing the gap pad/putty pad, gently clean the interface plate or the hardware surface with an alcohol cleaning pad.

  • Hold the gap pad/putty pad carefully to avoid deformation. Make sure no screw hole or opening is blocked by the gap pad/putty pad material.

  • Do not use expired putty pad. Check the expiry date on putty pad package. If the putty pads are expired, acquire new ones to properly replace them.

Firmware and driver download: You might need to update the firmware or driver after replacing a component.

Procedure

Attention
Make sure that the retaining clips on all memory module connectors are in the locked position.

  1. If you are installing a new water loop to the tray, before starting to install the water loop, complete replacing the VR conduction plate first, see Install the VR conduction plate for water loop replacement. If you are reinstalling the water loop after replacing the system board, processor, or power distribution board, skip this step.
  2. 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 1. Touching points when removing water loop from package box
    Top imageIsometric view of water loop
    Bottom imageTop view of the water loop

    Touching points when removing water loop from package box
  3. If needed, remove plastic grease covers from the underside of processor cold plates.
    Figure 2. Plastic grease covers removal
    Plastic grease covers removal
  4. Fully loosen four captive thumbscrews on the water loop carrier.
    Figure 3. Loosening water loop carrier captive thumbscrews
    Loosening water loop carrier captive thumbscrews
  5. Check the both gap pads and putty pads on the bottom side and top side of the water loop, if any of them are damaged, missing, or fallen off the water loop, replace them with new ones. Make sure to follow Gap pad/putty pad replacement guidelines.
    Figure 4. Water loop gap pads (bottom side)
    Water loop gap pads (bottom side)
    Figure 5. Water loop gap pads (top side)
    Water loop gap pads (top side)
    Attention

    Putty pad cannot be reused. Whenever the water loop is removed, putty pads must be replaced with new ones before reinstalling the water loop.

    Figure 6. Water loop putty pads
    Water loop putty pads
  6. Install the one side of the water loop.
    1. Carefully hold the water loop with both hands and flip it.
    2. Carefully position the water loop onto the three guide pins, one near the front of the node and two near the rear of the node; then, gently lower down the water loop and ensure it is seated firmly on the system board.
    Attention
    Keep the water loop at an upright position to prevent damaging the system board.
    Figure 7. Water loop carrier installation
    Water loop carrier installation
  7. Unfold and install the other side of the water loop as shown.
    Attention
    Make sure to align the water loop with the three guide pins on the left side compute node.
    Figure 8. Guide pins on the left side compute node
    Guide pins on the left side compute node
    Figure 9. Unfolding water loop
    Note

    Do not tilt the water loop. Keep the water loop horizontal with the tray.


    Unfolding water loop
  8. Install processor cold plate screws (12x Torx T20 screws per node). Follow the screw sequence specified below and tighten the screws with a torque screwdriver. Fully tighten each screw; then, proceed to the next screw.
    Note
    For reference, the torque required for the screws to be fully tightened/removed is 1.12-1.46 newton-meters, 10-13 inch-pounds
    Figure 10. Processor cold plate installation
    Fully tighten each screw the order below:
    ProcessorScrew sequence
    A1 > 2 > 6 > 4 > 3 > 5
    B1 > 2 > 3 > 5 > 6 > 4
    C2 > 1 > 4 > 6 > 5 > 3
    D2 > 1 > 5 > 3 > 4 > 6

    Processor cold plate label

    Processor cold plate installation
  9. Loosen water loop carrier screws (24x Phillips #2 screws for two nodes).
    Note
    The screw holes on the rear of the carrier are marked with L and R. Select screw holes marked as L when the carrier is on the left node, and R for the right node.
    Figure 11. Loosening water loop carrier screws
    Loosening water loop carrier screws
  10. Remove the water loop carrier. Carefully lift each water loop carrier up and away from the water loop one at a time.
    Figure 12. Water loop carrier removal
    Water loop carrier removal
  11. Install water loop screws and quick connect screws (14x 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.

    • Install the 1 VR cold plate screws (x2) with washers.

      • Installing a new water loop:

        Use the washers previously removed from the defect water loop. If there were no washers on the VR cold plate originally, use the washers in VR Conduction Plate 12.4 (including washers).

      • Reinstalling the water loop:

        You may not be installing a new water loop, but is reinstalling the water loop after replacing the system board, processor, or power distribution board. In this case, use the washers previously removed from the water loop. If there were no washers on the VR cold plate originally, it is not required to install VR cold plate with washers.

    Figure 13. VR cold plate screws with washers
    VR cold plate screws with washer
    Figure 14. Water loop screws and quick connect screws installation
    Water loop screws and quick connect screws installation
  12. Install the ten Torx T10 screws to secure the quick connect.
    Figure 15. Quick connect screw installation
    Quick connect screw installation
After you finish

  1. Install the PCIe riser assembly. See Install a PCIe riser assembly (ConnectX-6) , Install a PCIe riser assembly (ConnectX-7 NDR 200), or Install a PCIe riser assembly (ConnectX-7 NDR 400).

  2. Install the drive cage. See Install a drive cage assembly.

  3. Install the M.2 backplane assembly. See Install the M.2 backplane assembly.

  4. Install the memory modules. See Install a memory module.

  5. Install the DIMM comb. See Install a DIMM comb.

  6. Install the cross braces. See Install the cross braces.

  7. Install the tray cover. See Install the tray cover.

  8. Install the tray into the enclosure. See Install a DWC tray in the enclosure.

  9. Connect all required external cables to the solution.
    Note
    Use extra force to connect QSFP cables to the solution.

  10. Check the power LED on each node to make sure it changes from fast blink to slow blink to indicate all nodes are ready to be powered on.

Demo video

Watch the procedure on YouTube