3Com CoreBuilder 9000 Quick Installation Manual page 12

12 7-S C Q
LOT HASSIS
I G
UICK NSTALLATION UIDE
Installing the Chassis in a Rack Without Clip Nuts
Follow these steps to mount the chassis in a rack. Use at least two
people to perform this installation.
1 Locate and mark the holes on the rack where you want to place the
chassis.
2 Two people lift the chassis through the front of the rack, until both
chassis rack-mount flanges are flush with the front of the rack.
3 Use the preinstalled flange pins in the Telco rack slot to position the
chassis in the rack.
Support the back of the chassis until the two bottom screws are fully
inserted.
4 While you support the back of the chassis, insert one bottom screw on
each side of the chassis and then tighten the screw.
Tighten the #10 screws that hold the chassis onto the rail to a Torque
Specification of 22-25 in/lb (inches per pound).
5 Insert one top screw on each side of the chassis and then tighten the
screw.
6 Install all remaining screws and tighten them.
Installing the Chassis in a Rack Using Rack-Mount Clip Nuts
Follow these steps to mount the chassis in a rack when you use
rack-mount clip nuts.
Not all racks require that you use rack-mount clips. Use whatever
method of rack-mount equipment that you have to meet installation
requirements in a rack.
Use at least two people to perform this installation.
1 Mark and locate the holes on the rack where you want to place the
clip nuts.
2 Install the clip nuts on the rack in the positions that you selected. See
Figure 8.
The rack slots are not equally spaced, so align the clip nuts to the slots
properly for the screws to be easily installed.