Install the Lenovo Neptune Liquid to Air Module

Follow instructions in this section to install the Lenovo Neptune Liquid to Air Module (L2AM).

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.

CAUTION

When removing a new L2AM 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 damages.

CAUTION

Ensure that the module handle (L2AM heat sink bracket) is installed when removing or installing the L2AM. Do not touch the radiator fins. Touching the radiator fins might damage the L2AM.

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

Procedure

1. Install the PSU air baffle. See Install a power supply unit air baffle baffle.
2. If you have removed the radiator tray, install the radiator tray to the chassis.
   
   
   
   
   1. Place the tray evenly into the chassis and then move it to the right so that the screw hole on the tray aligns with the hole on the chassis.
   2. Tighten the screw.
3. Separate the L2AM module from the shipping tray.
   
   

   

   
   

   1. Loosen the four screws on the L2AM shipping tray.

   2. Grasp the middle of the module handle (L2AM heat sink bracket) and one T20 screw fastening the radiator to lift the L2AM to separate the module from the shipping tray.

4. 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.

5. Install the L2AM to the system board assembly.
   
   

   

   
   

   1. Align the triangular mark on the cold plate assembly label with the triangular mark on the processor carrier and processor. Install the L2AM onto the processor-carrier. Press the carrier into place until the clips at all four corners engage.

   2. Fully tighten the eight Torx T20 nuts in the installation sequence shown on the cold plate assembly and the radiator. Tighten the screws and then, visually inspect to make sure that there is no gap between the screw shoulder beneath the cold plate assembly and the processor socket.

6. Separate the module handle (L2AM heat sink bracket) from the module.
   
   

   

   
   

   1. Loosen the five screws on the module handle (L2AM heat sink bracket).

   2. Grasp the middle of the module handle (L2AM heat sink bracket) to separate it from the module.

7. Install the leak detection module to the PSU air baffle.
   
   

   

   
   

   1. Install the L2AM into the two clips on the PSU air baffle. Ensure that the module is secured in place.

   2. After the module is secured, route the cable through the cable clips to keep tidy for later cable routing arrangements.

   Note

   For liquid detection sensor module working status, see Liquid detection sensor LED.
8. Connect the pump cable and leak detection cable of the L2AM to the connectors on the system board assembly. See Liquid to Air Module (L2AM) cable routing.