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Dell PowerEdge R750 Installation and Service Manual

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Installing the liquid cooling module

Prerequisites

Never uninstall the heat sink from a processor unless you intend to replace the processor or system board. The heat sink is necessary to maintain proper thermal conditions.

  1. Follow the safety guidelines listed in the Safety instructions.
  2. Follow the procedure listed in the Before working inside your system.
  3. Remove the air shroud or remove the GPU air shroud.
  4. Remove the expansion card riser.
  5. If installed, remove the processor dust cover.
NOTE:The procedure to install the processor onto the liquid cooling module is same as installing the processor onto the PHM.
NOTE:Ensure anti-tilt wires on the liquid cooling module are in the unlocked position.

Steps

  1. Align the liquid cooling module with the standoff screws on the system board.
    NOTE:Ensure that the liquid cooling tubes and liquid cooling leak detection cable are placed towards the rear of the system.
  2. Place the module on the processor slot and set all the anti-tilt wires to locked position (outward position).
  3. Route the liquid cooling tubes on the front of the system between DIMM slots and J_SL connector.
  4. Using a Torx #T30 screwdriver, tighten the captive screws (12 in-lbf).
  5. The tubes leading towards the rear of the chassis and the liquid cooling leak detection cable are placed in between the PSU 2 and the clip of rear I/O board (RIO).
    NOTE: Leak detection cable must be placed first into the clip (underneath the cooling tubes), then place tube 2 and tube 1 into the clip to ensure cable does not interfere with the PCIe risers.
  6. Route the rear end of the liquid cooing tubes through the RIO board.
    NOTE: Follow the number labels on the liquid cooling tubes and ring holders (1,2).
  7. Connect the liquid cooling leak detection cable to the connector on RIO.
  8. Align the rubber ring on the tubes with the liquid cooling ring holder.
  9. Tilt the liquid cooling ring holder and using a Phillips #2 screwdriver, tighten the captive screw on the liquid cooling ring holder to secure it in place.
    NOTE:The numbers on the image do not depict the exact steps. The numbers are for representation of sequence.
    Figure 1. Installing the liquid cooling module
    This image shows the steps to install the liquid cooling heat sink modules

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