3Com CoreBuilder 9000 Quick Installation Manual page 8

8 7-S C Q
LOT HASSIS UICK
I G
NSTALLATION UIDE
Before You Begin
Before you install the chassis:
Move the CoreBuilder 9000 chassis close to where you plan to
install it. Place the chassis in front of the rack, table, or shelf that
you plan to use.
For a rack installation, make certain that you have a Phillips
screwdriver and a flat-blade screwdriver, and at least 8 of the
12 screws (from the hardware kit) available when you begin to
install the chassis.
Position the rack-mount clips if you are going to use them for the
rack-mount installation.
For a tabletop or shelf installation, make certain that you have a
Phillips screwdriver or flat-blade screwdriver and the hardware kit
available.
Because the equipment rack environment can cause increased
ambient temperatures and reduced air flow, review the chassis
specifications and site requirements in Appendix A and Appendix C
of the CoreBuilder 9000 Enterprise Switch Getting Started Guide.
Use the following rack-mount installation guidelines to ensure your
safety and optimal performance. Review all guidelines before you install
the chassis in a rack.
Use the following guidelines to tighten screws to Torque
Specification:
Faceplate thumbscrews — 5-7 in/lb (inches per pound)
#10 screws for holding the chassis onto the rack rail —
22-25 in/lb
To ensure that you tighten screws to Torque Specification, use a torque
screwdriver.
Before you attempt to mount the chassis in a rack:
Select a rack that can support at least 115.65 kg (255 lb), which
is three times the weight of a fully loaded 7-slot chassis, and that
provides sufficient vertical space for each chassis that you want
to install.