Dell PowerVault 745N - Manual (Page 23)

Rack Installation Guide
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To mark the rack, perform the following steps:
1 Place a mark on the rack’s front vertical rails where you want to locate the bottom of the
system you are installing in the two-post rack.
The bottom of each 1-U space is at the middle of the narrowest metal area between holes.
NOTE:
If your rack has wide-hole spacing, go to step 3.
2 Place a mark 44 mm (1.75 inches) above the original mark you made (or count up three holes
in a rack with universal-hole spacing) (see Figure 13).
Each 1 U (44 mm, or 1.75 inches) of vertical space on a rack with universal-hole spacing has
three holes with center-to-center spacing between holes (beginning at the top of a 1-U space)
of 0.625, 0.625, and 0.5 inch (see Figure 13).
NOTE:
If your rack has universal-hole spacing, you have completed the procedure for marking
the rack.
3 Place a mark 44 mm (1.75 inches) above the original mark you made (or count up to the next
hole in the rack with wide-hole spacing (see Figure 14).
Each 1 U (44 mm, or 1.75 inches) of vertical space on a rack with wide-hole spacing has two
holes with center-to-center spacing between holes (beginning at the top of a 1-U space) of
31.7 mm (1.25 inches) (see Figure 14).
Installing the Slide Assemblies in the Rack
You can install the slide assemblies in a two-post, open-frame rack having either universal-hole
spacing (see Figure 13) or wide hole spacing (see Figure 14). You can install the 1-U slide
assemblies in either a flush-mount or center-mount configuration.
CAUTION:
Do not install another system using this rack kit. Use only the rack kit intended for your
system. Using the rack kit for another system may result in damage to the system and personal injury to
yourself and to others.
Center-Mount Installation
The two-post rack kit is shipped with the brackets configured for center-mount installation.
To complete the installation, perform the following steps:
1 Locate the right slide assembly and push the back bracket towards the back of the slide
assembly (see Figure 15).
2 Position the right slide assembly in the two-post rack at the location you marked, push the
back bracket forward against the vertical two-post rack, and secure the front and rear
center-mounting brackets to the rack with two 12-24 x 0.5-inch pan-head Phillips screws
(see Figure 15).