Harris Performance 7000 - Manual (Page 39)

6800/7000 Series - Frames and Power Supplies Installation and Operation Manual 13
Overview Chapter 3: FR-6804/FR-6804-1 Frames
Installation Requirements
The FR-6804(-1) frame is a 2RU unit requiring 3.5 in. (88 mm) of
standard 19 in. (483 mm) rack space. The depth from the mounting
surface is 11 in. (280 mm).
The FR-6804(-1) frame should be installed in the same rack, just below
the CF-6801 cooling frame. See Chapter 4 for further information.
CF-6801 Overview
The CF-6801 is a 1RU fan tray with a high-airflow fan array providing
redundant, low-noise cooling for up to two 2RU frames of equipment
(4RU), or up to twenty 6800/7000 series modules. This fan array
provides 40 cubic feet per minute (cfm) of airflow, evacuating from the
frames below it and exhausting into the rear of the rack. Interface
modules (back-boxes) are inserted from the rear of the frame. These
interface modules are specifically related to the processing module
located in the front of the frame.