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Cisco ONS 15454 Installation and Operations Guide
November 2001
Chapter 1 Hardware Installation
Fan-Tray Assembly Installation
Procedure: Install the Bottom Brackets and Air Filter
The shelf assembly ships with bottom brackets that you should use to install the air filter. The bottom
brackets consist of two grooved metal pieces that attach to the bottom of the shelf assembly using three
screws each. When you use the bottom bracket to install the fan-tray air filter, you do not need to remove
the fan-tray assembly to access the air filter. Attach the brackets to the bottom of the shelf assembly
before installing the rack.
Although the filter will work if it is installed with either side facing up, Cisco recommends that you
install it with the metal bracing facing up to preserve the surface of the filter.
Note If you choose not to install the bottom brackets, install the air filter by sliding it into the compartment
at the bottom of the shelf assembly. Each time you remove and reinstall the air filter in the future,
you must first remove the fan-tray assembly.
Step 1 With the fan-tray assembly removed, place the ONS 15454 face down on a flat surface.
Step 2 Locate the three screw holes that run along the left and right sides of the bottom of the shelf assembly.
Step 3 Secure each bracket to the bottom of the shelf assembly using the screws provided.
Each bracket has a filter stopper and a flange on one end. Make sure to attach the brackets with the
stoppers and flanges facing the rear of the shelf assembly (the top, if the ONS 15454 is face-down during
installation).
Figure 1-20 illustrates bottom bracket installation. If you do not use the bottom brackets, in the future
you must remove the fan-tray assembly before removing the air filter. The bottom brackets enable you
to clean and replace the air filter without removing the fan-tray assembly.
Figure 1-20 Installing the bottom brackets
If you are using the bottom brackets to install the fan-tray air filter, you can install three shelf assemblies
in a standard seven-foot rack. If you are not using the bottom brackets, you can install four shelf
assemblies in a rack.
39487
RET 1
CAUTION: Remove power from both
the BAT1 and terminal blocks
prior to servicing
SUITABLE FOR MOUNTING ON
A NON-COMBUSTIBLE SURFACE.
PLEASE REFER TO INSTALLATION
INSTRUCTIONS.
-42 TO -57 Vdc
650 Watts Maximum
BAT 1
RET 2
BAT 2