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

Safety information for liquid detection sensor module cable

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 screwdriver	Torx T20 screw
Phillips 2 screwdriver	Phillips 2 screw

Procedure

1. Prepare your server.
   1. Install the hose holder to the chassis.
      Figure 1. Installing the hose holder
      
      

      1. Loosen the screw on the processor board.

      2. Align the screw holes on the hose holder and processor board, and align the guiding pins of the holder to the rear wall.

      3. Tighten the screw to secure the holder to the processor board.

   2. Remove the hose holder cover.
      Figure 2. Removing the holder cover
      
      

      1. Loosen the two screws from the hose holder cover.

      2. Pull the cover backwards to disengage it from the holder.

2. Make sure you have an alcohol cleaning pad available.
   Attention

   If there is any old thermal grease on the processors, gently clean the top of the processors with an alcohol cleaning pad.
3. Install the processor. For more information, see Install a processor.
4. Install the DWCM to the system board assembly.
   Figure 3. Installing the DWCM
   
   

   1. Align the triangular mark and the Torx T20 nuts on the cold plate assembly with the triangular mark and threaded posts of the processor socket; then, insert the cold plate assembly into the processor socket.

   2. Fully tighten the Torx T20 nuts in the installation sequence shown on the cold plate assembly. Tighten the screws until they stop; then, visually inspect to make sure that there is no gap between the screw shoulder beneath the cold plate assembly and the processor socket. (For reference, the torque required for the fasteners to fully tighten is 1.25-1.45 newton-meters, 11-13 inch-pounds.)

5. Remove the module handle from the DWCM.
   Figure 4. Removing the module handle
   
   
   1. Rotate the screws as illustrated above to unlock the handle.
   2. Separate the handle from 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 5 and proceed with further installation.

6. Install the cold plate covers. Press the cover down as illustrated below.
   Figure 5. Installing a cold plate cover
   
   
7. Place the hoses, the liquid detection sensor module and the cable.
   Figure 6. Placing the hoses and module
   
   

   Note

   Figure 7. The installation details
   
   

   • The hoses: place the middle part of the hose against the blue latch; and insert the 1 outlet and 2 inlet hoses into the holder.

   • The hoses have guiding labels 3 attached, check for the labels before installation. The labels help hoses go to the right place, so align the labels with holder latches. Otherwise the hoses might obstruct open connectors on the system board assembly.

   • The liquid detection sensor module 4: Insert the module to the holder beside the hoses. And 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 leak detection sensor module.

8. Re-install the hose holder cover.
   Figure 8. Installing the cover back
   
   
   1. Slide the holder cover in and align the screw holes.
   2. Tighten the screws.
9. Connect the liquid detection sensor module cable of the DWCM to the connector on the system board assembly. See Direct water cooling module.
10. Install the top cover. See Install the top cover.
11. To install the server into the rack, see Install the server to rack.
12. To install the quick connect plugs to the manifolds, see Install the manifold (in-rack system) or Install the manifold (in-row system).