Removing the manifold

Use this information to remove 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 remove the manifold, complete the following steps.

1. Slide all water-cooled technology trays in the entire rack out of the chassis about 4-inch or 100 mm (see Removing a water-cooled technology tray from a chassis).
2. At the front of the rack, close both Eaton ball valves.
   Figure 1. Eaton ball valves closed
   
   
3. Remove EMC shields on both sides of the top chassis.
   Figure 2. EMC shields removal
   
   

   Figure 3. EMC shields removal
   
   
4. Remove the red quick connect plug covers from the tops of each manifold.
   Figure 4. Quick connect plug covers removal
   
   
5. Place the open blue hose end of the drain hose (tool left at customer site) into a bucket. Make sure that the lever on the drain hose valve is closed (lever is pointed away from the hose).
   Figure 5. Water draining
   
   
6. Connect the Quick connect socket from the drain hose tool to the top of the return side manifold (position middle of the rack).
   Figure 6. Quick connect socket from the drain hose tool to the top of the return side manifold connection
   
   
7. Once the quick connect is attached, slowly open the hose valve and allow water to drain until water stops flowing (approximately 1 minute).
   Figure 7. Water draining
   
   
8. Move to the top position of the other manifold (position closest to the rack side wall). Leave the hose connected to the top of the manifold until water stops flowing. Disconnect quick connect from top of manifold.
   Figure 8. Quick connect socket from the drain hose tool to the top of the supply side manifold connection
   
   
9. 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 drain. Repeat drain process until all positions in the entire rack have been drained.
10. Re-attach the hose which should be put onto the manifold that has the section to be replaced to the top of the manifold before moving back around to the front of the rack.
11. At this point, the manifold should be properly drained to allow for service. Since there still can be some water left in the manifold, prepare work area with absorbent cloths to collect any water that may drain out.
12. Determine which manifold needs to be replaced.
13. Move to the rear of the rack. Remove manifold retention bracket that is retaining the manifold (top chassis position only).
    Figure 9. Retention bracket removal
    
    
14. Remove drip sensor assembly. Lift latch upwards.
    Figure 10. Drip sensor assembly removal
    
    
15. Remove FPC card module and FPC card module support bracket if portion of left manifold is being replaced. If it is the right side manifold, remove blank filler.
    Figure 11. FPC card module removal
    
    
16. Unscrew 4 screws (using the screwdriver contained in the manifold repair kit) to loosen the manifold bracket from the chassis.
    Figure 12. Manifold screw locations
    
    
17. Repeat steps 13-16 for all manifold sections until you can freely access the entire manifold to be replaced.
18. It is recommended to remove the entire manifold and lay it on the ground for the next steps.
19. Place a pan under the section of the manifold to be removed.
    Figure 13. Manifold disassemble
    
    
20. Disconnect manifold section to be replaced from the rest of the manifold by disconnecting the couplings. Use 41mm wrench supplied with replacement manifold section kit.