Remove the manifold

Use this information to remove the manifold.

About this task

CAUTION

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

S002

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.

S038

CAUTION

Eye protection should be worn for this procedure.

Attention

• Read the following sections to ensure that you work safely.

  • Installation Guidelines

  • Safety inspection checklist

• 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.

Procedure

1. Make preparations for this task.
   1. Slide all DWC trays in the entire rack out of the enclosure about 4-inch or 100 mm (see Remove a DWC tray from the enclosure).
   2. At the front of the rack, close both Eaton ball valves.
      Figure 1. Eaton ball valves closed
      
      

      Table 1. Eaton ball valves

      1 Rack supply

      2 Rack return

   3. Remove EMC shields on both sides of the top enclosure.
      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 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 enclosure from the top enclosure to the bottom enclosure by reaching into each enclosure 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 enclosure position only).
       Figure 9. Retention bracket removal
       
       
   14. ❶ Push the latch up upwards and ❷ slide the drip sensor assembly backwards, then; lift the drip sensor assembly up to clear sensor post and pull it out of the enclosure.
       Figure 10. Drip sensor assembly removal
       
       

       Figure 11. Drip sensor assembly
       
       

       Table 2. Drip sensor assembly

       1 Connector

       2 Latch

   15. Remove SMM2 and SMM2 support bracket if portion of left manifold is being replaced. If it is the right side manifold, remove blank filler.
       Figure 12. SMM2 removal
       
       

       Figure 13. SMM2 Support bracket removal
       
       
2. Unscrew four screws (using the screwdriver contained in the manifold repair kit) to loosen the manifold bracket from the enclosure.
   Figure 14. Manifold screw locations
   
   

   Table 3. Manifold screw locations

   1 Screws

   2 Manifold

3. Repeat steps 14-17 for all manifold sections until you can freely access the entire manifold to be replaced.
4. Remove the entire manifold and lay it on the ground for the next steps.
5. Place a pan under the section of the manifold to be removed.
   Figure 15. Manifold disassemble
   
   

   Table 4. Manifold disassemble

   1 41mm wrench

6. 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.