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Remove a compute tray from the rack

Follow instructions in this section to remove a compute tray from the rack. The procedure must be executed by a trained technician.

S036




18 - 32 kg (39 - 70 lb)32 - 55 kg (70 - 121 lb)
CAUTION
Use safe practices when lifting.
S038
Use eye protection
CAUTION
Eye protection should be worn for this procedure.
S040
use protective gloves
CAUTION
Protective gloves should be worn for this procedure.
S042
Danger
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.

tip hazard
Attention
Do not leave multiple trays open at the same time, as it may increase the risk of over-tilting or instability.

Attention
  • Read Installation Guidelines and Safety inspection checklist to ensure that you work safely.
  • Touch the static-protective package that contains the component to any unpainted metal surface on the server; then, remove it from the package and place it on a static-protective surface.
  • Power off the compute tray and peripheral devices and disconnect the power cords and all external cables. See Power off the rack solution.
Note
  • Ensure the E1.S and M.2 drives are removed from the failed compute tray prior to its return. See Remove an E1.S hot-swap drive from a compute tray and Remove an M.2 drive from a compute tray for removal procedures.
  • Ensure the following tools are available to perform the replacement:
    • Two 30L containers (one labeled with “Fresh” and one labeled with Waste") with integrated hose mounts
    • Air compressor
    • Approved coolant: PG25, NALCO® TCS101, or HPCCL2000 (Deionized water premixed with a compatible antimicrobial agent)
    • Compute tray shipping carton
    • Cordless transfer pump
    • Lift tool
    • Liquid cooling service kit includes below:
      • Draining kit: Connects the tray to the drainage/coolant container.
      • Air input kit: Connects the air compressor to the tray
      • Filler kit: Connects the pump to the tray
      • Coolant source kit: Connects the coolant/fresh deionized water container to the pump.
      • Nitrogen release kit with gauge: Connects the tray to the drainage container.
    • NVLink connector covers
    • Phillips #2 bit
    • Quick connector caps
    • Reusable straps
    • Spill kit
    • Torque screwdriver

Procedure

  1. Slide out the compute tray.
    1. Open the handles on both sides of the tray.
    2. Hold the handles and slide the tray out until it stops.
    Figure 1. Sliding out the compute tray
    Sliding out the compute tray
  2. Press the white latches on both sides of the rail to remove the compute tray completely from the rack. Then, place the tray on the lift tool.
    Figure 2. Removing the compute tray
    Removing the compute tray
  3. After tray removal, install the four NVLink connector covers and two quick connector caps onto the rear of the tray.
    Figure 3. Installing the NVLink connector covers and quick connector caps
    Installing the NVLink connector covers and quick connect caps
  4. Remove the inner rail from the compute tray.
    1. Loosen the screw that secure the inner rail.
    2. Slightly pull the latch upward to disengage the inner rail from the mounting pins on the tray.
    3. Remove the inner rail from the tray.
    4. Repeat the same steps above to remove the other inner rail.
      Figure 4. Removing the inner rail
      Removing the inner rail
  5. Remove both quick connector caps from the compute tray.
  6. Drain the coolant from the compute tray.
    1. Ensure the ball valve on the draining kit is closed. Then, attach the kit to the left quick connector on the rear of the tray.
    2. Place the exhaust end of the draining kit into the drainage container.
    3. Gradually open the ball valve on the draining kit to bleed off any internal pressure; liquid will begin to flow into the container.
    4. Attach the air input kit to the right quick connector on the rear of the tray.
    5. Connect the opposite end of air input kit to the air compressor.
    6. Activate the compressor to apply air pressure. Maintain this for approximately five minutes.
    7. Once the coolant stream stops, power off the compressor, close the ball valve, and disconnect the hoses from the tray.
      Figure 5. Attaching the draining kit
      Attaching the draining kit
      Figure 6. Attaching the air input kit
      Attaching the air input kit
  7. Sanitize the compute tray.
    1. Ensure the ball valve on the draining kit is closed. Then, attach the kit to the left quick connector.
    2. Place the exhaust end of the draining kit into the drainage container.
    3. Gradually open the open the ball valve on the draining kit to ensure no pressure or liquid remains in the tray.
      Figure 7. Attaching the draining kit
      Attaching the draining kit
    4. Install the silicon washers on the ends of filler kit and coolant source kit that connect to the cordless transfer pump.
      Figure 8. Installing the silicon washers
      Installing the silicon washers
    5. Attach the filler kit to the right quick connector.
    6. Connect the opposite end of the filler kit to the pump.
    7. Place the coolant source kit into the fresh deionized water container.
    8. Connect the opposite end of the coolant source kit to the pump.
    9. Turn on the pump and run for five minutes or until the water is consumed. A five-minute flush at a flow rate of 3 LPM requires a total volume of 15 L of deionized water.
    10. Power off the pump when the time expires or the water is consumed. Then, disconnect the kits from the right quick connector and the pump.
      Note
      Do not recirculate water. This is a one-way flush. Dispose of all water collected in the drainage container.
      Figure 9. Attaching the filler kit and coolant source kit
      Attaching the filler kit and coolant source kit
    11. Attach the air input kit to the right quick connector.
    12. Connect the opposite end of air input kit to the air compressor.
    13. Activate the compressor to apply air pressure. Maintain this for five minutes.
    14. Power off the compressor. Then, disconnect the kit from the right quick connector.
      Figure 10. Attaching the air input kit
      Attaching the air input kit
    15. Use TCS101 or HPCCL2000 coolant for circulation. Adjust coolant volume based on the specific piping configuration.
    16. Attach the filler kit to the right quick connector.
    17. Connect the opposite end of the filler kit to the pump.
    18. Place the coolant source kit into the coolant container.
    19. Connect the opposite end of the coolant source kit to the pump.
    20. Turn on the pump and circulate for ten minutes at a flow rate of 3 LPM.
    21. Turn off the pump and disconnect the kits from the right quick connector and the pump.
      Figure 11. Attaching the filler kit and coolant source kit
      Attaching the filler kit and coolant source kit
    22. Attach the air input kit to the right quick connector.
    23. Connect the opposite end of air input kit to the air compressor.
    24. Activate the compressor to apply air pressure. Maintain this for twenty minutes.
    25. Power off the compressor, close the ball valve, and disconnect the hoses from the tray and reinstall both the quick connector caps.
      Figure 12. Attaching the air input kit
      Attaching the air input kit

After you finish

To return the tray, follow the packaging instructions below.
  1. Place the tray into the plastic bag. Fold and seal the bag neatly, leaving 20 cm of clearance at the rear to accommodate the cardboard protector.
  2. Apply the Lenovo tamper label.
  3. Put the cardboard protector onto the rear of the unit as illustrated.
    Figure 13. Installing the cardboard protector
    Installing the cardboard protector
  4. Secure the bottom of the shipping carton using the H-tape method with Lenovo tape.
  5. Insert the bottom cushion into the carton.
    Figure 14. Inserting the bottom cushion
    Inserting the bottom cushion
  6. Fold the cardboard along the score line to form an L-shape, then, place it against the front of the cushion.
    Figure 15. Installing the L-shaped cardboard
    Installing the L-shaped cardboard
  7. Carefully lower the tray into the bottom cushion compartment.
    Figure 16. Placing the tray into the carton
    Placing the tray into the carton
  8. Install the U-shaped cushion.
    1. Slide the U-shaped cushion between the L-shaped cardboard and the unit.
    2. Fold the remaining cardboard flap down along the score line.
    Figure 17. Installing the U-shaped cushion
    Installing the U-shaped cushion
  9. Place the two top cushions onto the top of the tray.
    Figure 18. Placing the top cushions
    Placing the top cushions
  10. Close the carton and apply Lenovo tape using the H-tape method. Attach any additional required labels.
  11. Place the carton on the pallet and secure it using four reusable straps as illustrated.
    Figure 19. Securing the carton with reusable straps
    Securing the carton with reusable straps
  12. Ensure all straps are firmly tightened. Inspect for any slack or misalignment before moving the pallet.
    Note
    Each pallet has a maximum capacity of four units.