Replacing the manifold

Use this information to replace the manifold.

Attention: You must remove the power from the rack cabinet and all components before you connect or disconnect the water supply lines and drain or fill the manifold.

Statement 5

CAUTION:

The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.

DWC Safety Information, Statement 14

CAUTION:

The water might cause irritation to the skin and eyes. Avoid direct contact with the lubricant.

(C034)

Attention: Ensure proper handling procedures are followed when working with any chemically treated water used in the compute rack cooling system. Ensure that material safety data sheets (MSDS) and safety information are provided by the water chemical treatment supplier and that proper personal protective equipment (PPE) is available as recommended by the water chemical treatment supplier. Protective gloves and eyewear may be recommended as a precaution.

To replace the server manifold, complete the following steps.

1. Install new manifold section into the manifold and connect couplings.
   Figure 1. Manifold assemble
   
   
2. Tighten 4 screws (using the screwdriver contained in the manifold repair kit) between manifold bracket and chassis.
   Figure 2. Manifold screw locations
   
   
3. Starting from the top, connect the manifold bracket for the top manifold section into the top chassis.
4. Continue to connect the other manifold sections working from the top down to the bottom.
5. Reinstall all drip sensor assemblies into chassis.
   Figure 3. Drip sensor assembly installation
   
   
6. For the manifold water fill/refill process, at the rear of the rack, connect the blue hose assembly (supplied to customer installation site) to the top quick connect at the top of the rack (location A). Make sure the hose still remains in the bucket with the valve closed (valve handle perpendicular to the hose).
   Note: The red plug cover will need to removed at all positions first in order to plug to the quick connects.

   Figure 4. Blue hose assembly to top quick connect connection
   
   
7. At the front of the rack, connect the facility supply hose to the rack return hose. Partially open the supply hose, about 1/4 of the way.
   Note: Do not fully open the facility ball valve or you will reduce your ability to control the flow as you fill the rack.

   Figure 5. Facility supply hose to rack return hose connection
   
   
8. At the back of the rack, slowly open the valve on the blue hose part of the way allowing air to flow out of the hose. Allow this to take place until a steady stream of water flows into the bucket or there are minimal bubbles in the sight-glass. It may take approximately 1 to 2 minutes for air bubbles to clear the hose.
   Figure 6. Blue hose valve opening
   
   
9. Close the valve on the blue hose. Then disconnect the blue hose assembly from Location A and move to Location B. Slowly open the valve and allow this to stay in place until a steady stream of water flows into the bucket or there are minimal bubbles in the sight-glass. Close the valve on the blue hose again.
   Figure 7. Hose assembly movement
   
   
10. Go back to the front of the rack, disconnect the facility supply hose from the rack return hose and connect the facility supply hose to the rack supply hose.
    Figure 8. Facility supply hose to the rack supply hose connection
    
    
11. Again, at the back of the rack, insure the blue hose still remains connected to Location B. Open the valve on the blue hose and leave in place until a steady stream of water flows into the bucket or there are minimal bubbles in the sight-glass.
    Figure 9. Hose assembly movement
    
    
12. Close the valve on the blue hose. Then remove blue hose assembly from Location B and move to Location A. Open the valve on the blue hose and allow this to stay in place until a steady stream of water flows into the bucket or there are minimal bubbles in the sight-glass.
    Figure 10. Blue hose valve opening
    
    
13. Close the valve on the blue hose. Disconnect and move to Location C and open the valve slowly. Leave in place until a steady stream of water flows or minimal bubbles are in the sight-glass. Approximate time 10-15 seconds.
    Note:

    • Top position EMC shields on all chassis positions will need to be removed in order to access the quick connects.
    • The red plug covers will need to be removed first in order to access the quick connects.

    Figure 11. Hose assembly movement
    
    
14. Close the valve on the blue hose. Disconnect and move the blue hose to Location D and repeat the process down the full rack ensuring each chassis has minimal air bubbles in the sight glass.
    Figure 12. Hose assembly movement
    
    
15. Continue to each chassis from the top chassis to the bottom chassis by reaching into each chassis Location C and Location D quick connects and allow for a steady stream of water to flow. There should be minimal air present in the sight glass.
    Note: Be sure to always close the valve on the blue hose before disconnecting it from one of the chassis locations as you work your way down the rack.
16. Once complete, go back to the front and connect the facility return hose to the rack return hose. Fully open all connections on both the supply and return side. The manifold should be completely filled.
    Figure 13. Facility return hose to the rack return hose connection
    
    
17. Check for leaks at the rear or the rack.
18. Install the FPC support bracket.
19. Reinstall all FPC card modules and fillers.
    Figure 14. FPC card module installation
    
    
20. Reinstall all EMC shields.
    Figure 15. EMC shields installation
    
    

    Figure 16. EMC shields installation
    
    

    Figure 17. Retention bracket installation