3Com 4005, Installation And Maintenance Manual

Page: 23 / 77

Preinstallation Guidelines 23
Rack Installation
Guidelines
Review the following guidelines before you install the chassis in a rack to ensure
your safety and the optimal performance of the Switch 4005:
WARNING: To ensure mechanical stability and to avoid circuit overloading and
improper grounding, follow the rack manufacturer’s instructions for rack
installation. If the instructions are unclear, consult a qualified electrician.
■
Clip nuts are not included in the Switch 4005 chassis hardware kit. Clip nuts
are not required for all rack types. Consult your rack manufacturer’s
documentation.
■
If you are going to use clip nuts, position them on the rack before you install
the chassis. You must position the clip nuts according to the rack type:
■
For Metric racks, install clip nuts and screws in the closed slots of the chassis
flanges (see Figure 4 on page 22).
■
For Telco racks, install clip nuts and screws in the open slots of the flanges
(see Figure 4 on page 22).
■
Because the equipment rack environment can cause increased ambient
temperatures and reduced air flow, review the “Environmental Specifications”
on page 16 and “Ventilation Requirements” on page 16.
■
Review the section “Precautionary Guidelines” on page 17.
■
Review the section “Safety Information” on page 18.
■
Review the section “Safety Precautions” on page 22.
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Before you attempt to mount the chassis in a rack, select a rack that can
support at least 61.8 kg (136.5 lb), which is three times the weight of a fully
loaded chassis.
■
If you install more than one chassis in a rack, install the bottom chassis first.
Chassis PreInstallation
Guidelines
Before you install the chassis:
■
Move the Switch 4005 shipping box to a location near where you plan to install
the chassis. Leave the chassis in its packaging until you are ready to install it.
■
For a rack installation, make certain that you have a Phillips screwdriver, a
flat-blade screwdriver, and the hardware kit available. For table or shelf
installation, have the rubber feet from the hardware kit available.
■
Attach the flanges (L-shaped brackets) to the sides of the chassis before you
attempt to lift and install the chassis in a rack.
Cable Management
Device Preinstallation
Guidelines
Before you install any cable management device in a rack, determine which rack
position is best by examining the:
■
Location in the rack where you plan to install the chassis
■
Depth of the rack in which you plan to install the chassis
■
Space required for proper ventilation of the chassis
■
Space required for module cables to bend
■
Proximity of other devices in the rack and their installation or environmental
requirements