Dell UPS 4200R - Manual (Page 8)

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Installation and Startup
Rackmount Setup
CAUTION: The cabinet is heavy (53 kg/116.8 lb). Lifting the cabinets into the rack requires a minimum of two
people.
Installing the Rails
NOTE: The instructions are the same for square-hole racks and unthreaded, round-hole racks. The rails fit both
rack styles. The round-hole rack is shown in the illustrations.
1 Select the proper holes in the rail for positioning the cabinet in the desired location in the rack.
The rails should be located at the bottom of the 3U space allocated for the EBM.
2 Position the end of the left and right rails labeled FRONT facing inward.