Install the Lenovo Neptune(TM) Processor Direct Water Cooling Module

Follow the instructions in this section to install the Direct Water Cooling Module (DWCM).

Important

This task must be operated by trained technicians that are certified by Lenovo Service. Do not attempt to remove or install the part without proper training and qualification.

About this task

S011

CAUTION

Sharp edges, corners, or joints nearby.

Attention

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

• Power off the server and peripheral devices and disconnect the power cords and all external cables. See Power off the server.

• Prevent exposure to static electricity, which might lead to system halt and loss of data, by keeping static-sensitive components in their static-protective packages until installation, and handling these devices with an electrostatic-discharge wrist strap or other grounding system.

CAUTION

When removing a new DWCM from the shipping box, lift out the cold plate assembly with the shipping tray attached to prevent thermal grease on the cold plate assembly from damage.

Prepare the following screwdrivers to ensure you can install and remove the corresponding screws properly.

Torque screwdriver type list	Screw Type
Torx T20 head screwdriver	Torx T20 screw

Procedure

1. Install the hose holder to the chassis.
   Figure 1. Installing the hose holder
   

   

   
   
   1. Remove the screws that secure the firmware and RoT security module if needed.
   2. Align the screw holes on the hose holder with the screw holes on the firmware and RoT security module, and the guiding pins of the holder with the holes on the rear wall.
   3. Tighten the screws to secure the hose holder to the system I/O board.
2. Install the processor. See Install a processor.
3. Install the DWCM to the system board assembly.
   Figure 2. Installing the DWCM
   

   

   
   

   1. Align the triangular mark and screws on the cold plate assembly with the triangular mark and threaded posts on the processor socket; then install the cold plate assembly on the processor socket.

   2. Fully tighten all the screws in the installation sequence shown on the cold plate assembly.

      Note

      For reference, the torque required for the fasteners to fully tighten is 1.25-1.45 newton-meters (11.0-13.0 inch-pounds).
4. Remove the module handle from the DWCM.
   Figure 3. Removing the module handle
   

   

   
   
   1. Rotate the screws as illustrated above to unlock the handle.
   2. Separate the handle from the DWCM.
   Note

   A new DWCM comes with a handle.

   1. To replace an old DWCM with a new one, remove the handle of the new one as illustrated above.

   2. To replace processors without changing the DWCM, a handle is not needed. Skip step 4 and proceed with further installation.

5. Install the cold plate covers. Press the cover down as illustrated below.
   Figure 4. Installing cold plate covers
   

   

   
   
6. Place the hoses and the liquid detection sensor module on the hose holder.
   Figure 5. Placing the hoses and module
   

   

   
   
   1. Place the hoses on the hose holder.
   2. Place the liquid detection sensor module on the hose holder.
   Note

   Figure 6. Installation details
   

   

   
   

   • Place the middle part of the hose against the blue latch, and insert the outlet hose 1 and the inlet hose 2 into the holder.

   • Check the guiding labels 3 on the hoses before installation, and align the labels with the front edge of the hose holder. Otherwise, the hoses might obstruct open connectors on the system board assembly.

   • Insert the liquid detection sensor module 4 to the holder beside the hoses. Make sure that the side with a status LED is up and route the cable as illustrated above.

   • For liquid detection sensor module working status, see LED on the liquid detection sensor module.

7. Install the riser cage.

   • 1FH riser cage

     Figure 7. Installing the 1FH riser cage
     

     

     
     

   • 3FH riser cage

     Figure 8. Installing the 3FH riser cage
     

     

     
     
   1. Align the riser card with the riser slot on the system board assembly. Carefully press the riser card straight into the slot until it is securely seated.
   2. Tighten the screw to secure the riser cage.
8. Connect the cable of the liquid detection sensor module to the connector on the system board assembly. See Direct water cooling module.