Skip to main content

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.
    • Customer / Self-maintainer responsibility:
      • Two 5L containers (one labeled with “Fresh” and one labeled with Waste") with integrated hose mounts
      • Approved coolant: PG25, NALCO® TCS101, or HPCCL2000 (Deionized water premixed with a compatible antimicrobial agent)
      • Air compressor
        • Vendor: e.g., Milwaukee
        • Max Pressure: 150 PSI +/- 1 PSI
        • Airflow: 1.4 CFM at 0 PSI
        • Hose: 36” with brass chuck
      • Compute tray shipping carton, pallet, and reusable straps
      • Cordless transfer pump
        • Vendor: e.g., Milwaukee
        • Flow rate: 480 GPH
        • Connections: ¾” Brass (standard garden hose connection)
        • Lift/Head: 18’ max suction lift
      • Lift tool (Genie Lift GL-8 material lift or ServerLIFT SL-350X)
      • Nitrogen cylinder (Airgas-NI 80A-Industrial grade Nitrogen, size 80 high pressure aluminum cylinder, CGA 580)
      • Nitrogen regulator (Airgas HCL3001036 – Harris® Model 425-50PSI-CGA580 Heavy-Duty Single-Stage Industrial Regulator for Argon, Helium, and Nitrogen)
      • NVLink connector covers
      • Quick connector caps
      • Spill kit
    • Lenovo Service / Self-maintainer responsibility:
      • Liquid cooling service kit includes below:
        • Air input kit: Connects the air compressor to the tray
        • Coolant drain kit: Connects the tray to the drainage / coolant container
        • Coolant fill kit: Connects the pump to the tray
        • Coolant source kit: Connects the coolant container to the pump
        • Nitrogen release kit with gauge: Connects the tray to the drainage container
        • Nitrogen supply kit: Connects the tray to the nitrogen cylinder regulator
      • Personal protective equipment (protective glasses and gloves)
      • Phillips #2 bit
      • 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 coolant drain 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 coolant drain kit into the drainage container.
    3. Gradually open the ball valve on the coolant drain 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.
      Figure 5. Attaching the coolant drain kit
      Attaching the coolant drain kit
      Figure 6. Attaching the air input kit
      Attaching the air input kit
    6. Set the air compressor to 25 PSI and activate it. 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. Immediately proceed the next step to fill the tray with nitrogen.
  7. Move the compute tray to the nitrogen station for filling.
    1. Ensure the nitrogen cylinder regulator is closed; then, connect the nitrogen supply kit end with the adapter to the regulator.
    2. Remove the right quick connector cap and attach the opposite end of the nitrogen supply kit.
    3. Ensure the ball valve on the nitrogen release kit is closed; then, remove the left quick connect cap and attach the kit.
    4. Open the nitrogen release kit valve, then open the regulator to purge the tray for at least five seconds.
    5. Open the regulator to purge the tray for at least five seconds. Then, close the nitrogen release kit valve.
      Figure 7. Attaching the nitrogen supply kit and nitrogen release kit
      Attaching the nitrogen supply kit and nitrogen release kit
    6. Adjust the regulator to 25 PSI, and verify that the release kit pressure gauge reads 25 PSI.
    7. Attach the tag to the tray and record the required details:
      • Date and time
      • Technician name
      • Pressure reading
      • Coolant type (including manufacture and model number)
    8. Close the regulator and remove both kits from the tray and reinstall the connector caps.

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 8. 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 9. 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 10. Installing the L-shaped cardboard
    Installing the L-shaped cardboard
  7. Carefully lower the tray into the bottom cushion compartment.
    Figure 11. 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 12. Installing the U-shaped cushion
    Installing the U-shaped cushion
  9. Place the two top cushions onto the top of the tray.
    Figure 13. 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 14. 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.