Cisco ASR 9000 Series Installation Manual page 160

Chapter 2 Unpacking and Installing the Chassis
Installing Chassis Accessories
Tighten the remaining loose screws to complete the installation. Torque the 8-32 screws to 18 in-lb and
Step 7
the 12-24 screws to 41 in-lb.
Figure 2-74 shows the router chassis with the air baffle installed in a 2-post 23-inch rack.
Figure 2-74 Cisco ASR 9904 Router Chassis with Air Baffle in 2-Post 23-Inch Rack
An electrical conducting path must exist between the product chassis and the metal surface of the
enclosure or rack in which it is mounted, or to a grounding conductor. The chassis has two grounding
points on each side of the baffle, however only one ground is required. The other will be grounded
through the top and bottom air deflectors. Figure 2-75 shows the baffle ground location on the chassis.
You can ground the baffle by either attaching a grounding lug to the chassis (see the "NEBS
Supplemental Unit Bonding and Grounding Guidelines" section on page 1-51), or by using
thread-forming mounting screws to establish a metal-to-metal contact. If you are using screws, remove
any paint or other non-conductive coatings on the surfaces between the mounting hardware and the
enclosure or rack. Clean all surfaces and apply an antioxidant applied before the installation.
Cisco ASR 9000 Series Aggregation Services Router Hardware Installation Guide
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