Dell PowerEdge 4220 Guide D'installation page 12

Replacing the Front Door
To replace the front door, perform the steps for removal in reverse.
Opening and Removing the Back Doors
WARNING:
Because of the size and weight of the rack cabinet doors, never
attempt to remove or install them by yourself.
1 Turn the door handle and open the back doors (see Figure 1-2).
Figure 1-2. Opening the Back Doors
1
2
1 door handle 2 back door (2)
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Installation Guide