HP FlexFabric 12900 series Installation Manual page 20

2. Mark the position on the rack for installing the slide rail:
a. Make sure the bottom edge of the slide rail aligns with the middle of the narrower metal area
between holes, as shown in
b. Each rack post requires six screws to attach the slide rail. You only need to mark the uppermost
square hole and lowermost square hole for installation.
c. Mark the square holes at the same height on the other three rack posts.
One rack unit has three holes, the middle of which is an auxiliary installation hole, and the
other two are standard installation holes. You can distinguish them by the space between each
two holes. The space between a standard installation hole and an auxiliary installation hole is
wider than that between two adjacent standard installation holes.
Figure 8 Locating the rack position for installing slide rails
(1) Middle of the narrower metal area between holes
Install six cage nuts in the square holes in each rack post:
3.
a. Insert one edge of a cage nut into the hole, as shown in callout 1 on
b. Compress the other edge of the cage nut to push the cage nut fully into the hole, as shown in
callout 2 on Figure
c. Repeat steps a and b to install cage nuts to all the marked positions on the right rack post.
Figure 9 Installing a cage nut
1
Figure 8.
9.
2
14
Figure 9.