Screw And Nut Placements - Dell EMC Data Domain DD9800 Installation Manual

Third-party rack installation
Follow these best practice guidelines to ensure an orderly installation:
● Third-party racks might have PDUs which face into the rack. This can cause interference between the shelf and/or rear
CMAs. Carefully plan and route cables to minimize any interference. It might be necessary to use a type of PDU that is
mounted in the main rack area.
● The shelf rails have four adjustment ranges, 18-22", 22-26", 26-30", 30-34". The default length (out of the shipping crate) is
the 22-26" setting.
● After installation, check each rail to ensure that it is level and in the correct location before installing the next rail.
● When securing rails to the NEMA channel, especially channels with square holes, install the screws loosely to prevent cross
threading, and tighten by hand. Do not over torque.
● Use black M5 screws, which align with both round and square channel holes, to secure all rails and components in the
customer racks. Discard all silver screws removed from the shipping rack.
Modifying rail lengths
This procedure details how to extend or shorten the rail lengths to accommodate third-party racks.
About this task
The rails have four adjustment ranges, 18-22", 22-26" (default), 26-30", 30-34". The length adjustments provided in this
procedure use the default length of 22-26" as a baseline.
The following links provide the steps for the various adjustment lengths:
●
18-22" length procedure
● 26-30" length procedure
● 30-34" length procedure
Steps
● To change the length of the rail to 18-22" (shortest setting) do the following:
Figure 50. Screw and nut placements
1. Orient one of the rails to identify the front of the rail so that the inside of the rail is visible with the spacing markings
visible.
2. Locate the two screws and nuts which hold the length adjustment bracket in place.
3. Using a screwdriver and a nut driver (pliers or vise-grips will work as well), remove both screws and nuts. The length
adjustment bracket will be free of the rail.
CL5496
Install the Disk Shelves in the Rack 45