17-7
Cisco ONS 15454 Procedure Guide, R5.0
March 2005
Chapter 17 DLPs A1 to A99
DLP-A7 Mount Multiple Shelf Assemblies in a Rack
Step 4 Lift the shelf assembly to the desired position in the rack.
Step 5 Align the screw holes on the mounting brackets with the mounting holes in the rack.
Step 6 While one person holds the shelf assembly in place, the other person can install one mounting screw in
each side of the assembly using the Phillips screwdriver.
Step 7 When the shelf assembly is secured to the rack, install the remaining mounting screws.
Note Use at least one set of the horizontal screw slots on the ONS 15454 to prevent slippage.
Step 8 Using the hex tool, remove the temporary set screws.
Step 9 Return to your originating procedure (NTP).
DLP-A7 Mount Multiple Shelf Assemblies in a Rack
Note The ONS 15454 must have one inch (25.4 mm) of airspace below the installed shelf assembly to allow
air flow to the fan intake. If a second ONS 15454 is installed underneath a shelf assembly, the air ramp
on top of the bottom shelf assembly provides the desired space. However, if the ONS 15454 is installed
above third-party equipment, you must provide a minimum spacing of one inch (25.4 mm) between the
third-party shelf assembly and the bottom of the ONS 15454. The third-party equipment must not vent
heat upward into the ONS 15454.
Step 1 Verify that the proper fuse and alarm panel has been installed in the top mounting space. If a fuse and
alarm panel is not present, you must install one according to the manufacturer’s instructions.
• If you are installing the 15454-SA-ANSI or 15454-SA-HD shelf assembly, a 100-A fuse panel
(30-A fuse per shelf minimum) is required.
• If you are installing the 15454-SA-NEBS3 shelf assembly, a standard 80-A fuse panel (20-A fuse
per shelf minimum) is required.
Step 2 Mount the first ONS 15454 directly below the fuse and alarm panel using the “DLP-A5 Mount the Shelf
Assembly in a Rack (One Person)” task on page 17-5 or the “DLP-A6 Mount the Shelf Assembly in a
Rack (Two People)” task on page 17-6.
Purpose This task allows multiple shelves to be assembled in a rack.
Tools/Equipment #2 Phillips screwdriver
Medium slot-head screwdriver
Small slot-head screwdriver
Prerequisite Procedures DLP-A3 Reverse the Mounting Bracket to Fit a 19-inch (482.6 mm) Rack,
page 17-2, if applicable
DLP-A4 Install the External Brackets and Air Filter, page 17-4, if
applicable
Required/As Needed As needed
Onsite/Remote Onsite
Security Level None
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