Install 48U Advanced Rack Extension Kit with RDHX

See this topic to learn how to install 48U Advanced Rack Extension Kit and RDHX.

Each unit of rack extension kit comes with additional capacity for up to two 0U PDUs, or one 0U PDU and one manifold, on each side of the rack.
Each rack cabinet supports up to two units of rack extension kit (one to the front and one to the rear side).
If there is a plan to install baying kit while only one of the adjacent cabinets will be installed with extension, make sure to install the baying kit first (see Install the baying kit). Then, as preparation for this procedure, remove the two screws from the upper and lower part of the cabinet that will be installed with the extension kit, and skip to Step 2.
Figure 1. Removing screws to prepare for extension installation
Required tools
- One tool with plastic blade/scissors to open the packaging
- One rubber hammer to align the extension panels with the side of the rack
- One Screwdriver with No. 3 Phillips bit to tighten the M6 screws (9 in the next bullet point)
- One Nut-driver with holding hex bit 10 mm to tighten the M6 screws (9 in the next bullet point)
- One 2.5 mm Hex bit socket to tighten the M4 screws (13 in the next bullet point)
- One 3 mm Hex bit socket to tighten the M5 screws (PDU/manifold brackets, opening covers on the extension panels)
- One 4 mm Hex bit socket to tighten the M6 screws (4 and 14 in the next bullet point)

The extension kit comes with a miscellaneous bag, which contains the following components:

Figure 2. Parts

No.	Description	Quantity	No.	Description	Quantity
`1`	Left extension panel	1	`9`	M6 x 16 mm hex head flange screw	21
`2`	Latch plate	1	`10`	Top hinge for RDHX	1
`3`	Support bracket	3	`11`	Cable strap module ¹²³	2
`4`	M6 x 16 mm flat head socket cap screw	10	`12`	Grounding plate	5
`5`	Bottom hinge for RDHX	1	`13`	M4 x 6 mm flat head socket cap screws	4
`6`	Right extension panel	1	`14`	M6 x 12 mm flat head socket cap screw	12
`7`	Extension top cover	1	`15`	Grounding wire ⁴	3
`8`	M6 cage nut	14

¹ Cable straps are removable, remove the straps from the extension panels if needed.
² Cable straps can be lengthened by connecting two or more straps together.
³ Use cable straps to secure PDUs and manifolds prior to shipping.
⁴ Connect one end of the grounding wire to the grounding plate on the extension panel and the other end to the nearest grounding plate on the rack.

Figure 3. Hex Allen wrenches

No.	Description
`1`	Hex Allen wrench, 4 mm
`2`	Hex Allen wrench, 3 mm
`3`	Hex Allen wrench, 2.5 mm

Procedure

Install fourteen M6 cage nuts to the rack frame with cage nut insertion tool or a flat-blade screwdriver.

Figure 4. Cage nut installation location

With cage nut insertion tool

Figure 5. Installing cage nuts with cage nut insertion tool

Insert one edge of the cage nut into the target mounting flange hole, and hook the other edge with the insertion tool through the flange hole.
Rotate and pull the tool to force the other nut edge into the flange hole, and thus secure the nut.

With flat blade screwdriver

Figure 6. Installing cage nuts with flat blade screwdriver

Insert one edge of the cage nut into the target mounting flange hole.
Press and compress the other nut edge with a flat-blade screwdriver, and rotate the screwdriver towards the flange hole until the nut edge goes in the hole.
Release the screwdriver to secure the nut in the mounting flange hole.

Install the bottom hinge.
Figure 7. Securing the bottom hinge
Note
Do not fully tighten the four screws in this step.
- Align the hinge with the rack.
- Secure the hinge to the rack with four screws.
Secure the two extension panels to the rack with fourteen screws.
Note
- Do not fully tighten the fourteen screws in this step.
- If baying kit has been installed previously, make sure to remove the two screws from top and bottom of the cabinet first. Then, secure the screws through the panel and the baying kit.
Figure 8. Installing the extension panels
Align the extension top cover with the screw holes on the extension panels, and secure it with six screws.
Figure 9. Installing the extension top cover
Depending on the requirements, remove the filler(s) from the extension panels to route cables.
Figure 10. Removing the filler(s)
1. Loosen the screws that secure the filler to the extension panel.
2. Remove the filler.
If there is a plan to install 0U PDU to the extension panel, complete the following steps.
Depending on the requirements, select the corresponding installation procedures.
- Bracket with two keyhole slots (up to two PDUs, or one PDU and one manifold)
  Note
  Below illustration shows the locations for installing the brackets.
  Figure 11. Locations for installing the brackets with two keyhole slots
  
  If one or two brackets are installed in the locations indicated in the illustration below, the M6 hex head flange screw must be replaced with an M6 round head flange screw.
  Figure 12. Replacing the screw
  
  Remove the M6 hex head flange screw.
  Install the M6 round head flange screw.
  Align the bracket with the extension panel, and secure it with four screws.
  Figure 13. Installing the bracket with two keyhole slots
  
  Insert the two PDU pegs into the keyhole slots on the brackets, and push down the PDU to secure it to the brackets. Choose the left or right slot for PDU installation based on the requirements.
  Figure 14. Installing the PDU
  
  Note
  PDU can be rotated 180 degrees for installation with the input cable at the bottom.
- L-shaped bracket (up to two PDUs, or one PDU and one manifold)
  Note
  Below illustration shows the locations for installing the brackets.
  Figure 15. Locations for installing the L-shaped brackets
  
  If one or two brackets are installed in the locations indicated in the illustration below, the M6 hex head flange screw must be replaced with an M6 round head flange screw.
  Figure 16. Replacing the screw
  
  Remove the M6 hex head flange screw.
  Install the M6 round head flange screw.
  Align the bracket with the extension panel, and secure it with three screws. Choose the installation location for the bracket based on the orientation of the PDU.
  Figure 17. Installing the L-shaped bracket with the PDU facing the front of the rack cabinet
  
  Figure 18. Installing the L-shaped bracket with the PDU facing the front of the rack cabinet
  
  Insert the two PDU pegs into the keyhole slots on the brackets, and push down the PDU to secure it to the brackets.
  Figure 19. Installing the PDU with the PDU facing the front of the rack cabinet
  
  Figure 20. Installing the PDU with PDU facing the rear of the rack cabinet
Depending on the requirements, select one of the following methods to ensure there is sufficient space for routing cables.
- Slide the brush panel
  Figure 21. Sliding the brush panel
  1. Loosen the two screws that secure the baffle to the top cover.
  2. Slide the baffle and brush panel toward the center of the top cover.
  3. Tighten the two screws to secure the baffle.
- Remove the brush panel
  Figure 22. Removing the brush panel
  
  Loosen the two screws to remove the brush panel from the top cover.
- Remove the brush panel and baffle
  Figure 23. Removing the brush panel and baffle
  
  Loosen the two screws to remove the brush panel and baffle from the top cover.
Tighten the two screws to secure the latch plate to the left extension panel.
Figure 24. Installing the latch plate
Remove the two doorstops from the right extension panel.
Figure 25. Removing the doorstops
Secure the bottom hinge to the right extension panel with four screws.
Figure 26. Securing the bottom hinge
If the rack needs to be shipped, install the three support brackets and skip steps 12 to 17.
Note
The support brackets must be removed upon arrival at the site to install the RDHX.
Figure 27. Installing the support brackets
Face the bottom side of the carton, remove the carton top, and slit the two carton corners on your right-hand side with a knife. Then, fold the right carton panel down to the ground, and rotate the threes carton inserts down.
Figure 28. Unpacking the heat exchanger
Top

Bottom
With three people, rotate the heat exchanger to vertical on the three carton inserts. Then, remove the inner and outer hose access panels while one person hold the heat exchanger.
Figure 29. Removing the hose access panels
Hold the heat exchanger with three people on the handles/spots as illustrated. Then, carefully lift the heat exchanger and turn it upright.
Figure 30. Lifting the heat exchanger with three people

1 Handles that the first person hold on to 3 Spots that the third person hold on to
2 Handles that the second person hold on to
Carry the heat exchanger with three people to the cabinet frame. Align the bottom corner with the bottom hinge pin; then, lower the heat exchanger to fit the pin in.
Figure 31. Installing the heat exchanger to the rack cabinet
Hold the heat exchanger in place with two people. Insert the top hinge pin to the heat exchanger; then, secure the hinge with seven screws.
Note
Do not fully tighten the seven screws in this step.
Figure 32. Installing the top hinge
Follow the sequence below to fully tighten the screws.
Note
Hold the handles on the heat exchanger and slightly lift it in steps 17-a to 17-c.
1. Four top hinge screws on the right side in Step 16
2. Three top hinge screws at the top in Step 16
3. Four bottom hinge screws in Step 2
4. Fourteen extension panel screws in Step 3