Dell PowerEdge R660 Installation and Service Manual

Installing the Direct Liquid Cooling module

1. Align the DLC module with the standoff screws on the system board.
   NOTE:Ensure that the DLC 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 DLC tubes to the front of the system and along the DIMM latches.
4. Using the Torx T30 screwdriver, tighten the captive nuts (8 in-lbf) on the DLC module in the order below:
   1. In a random order, tighten the first nut three turns.
   2. Tighten the nut diagonally opposite to the nut that you tighten first.
   3. Repeat the procedure for the remaining two nuts.
   4. Return to the first nut to tighten it completely.
   5. Check all the nuts to ensure they are firmly secured.
5. The tubes leading towards the rear of the chassis and the DLC 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), and then place tube 2 and tube 1 into the clip to ensure that cable does not interfere with the PCIe risers.
6. Route the rear end of the DLC tubes through the RIO board.
   NOTE: Follow the number labels on the DLC tubes and ring holders (1,2).
7. Connect the DLC leak detection cable to the connector on RIO.
8. Align the rubber ring on the tubes with the ring holder.
9. Tilt the DLC ring holder and using a Phillips #2 screwdriver, tighten the captive screw on the DLC 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.