Dell PowerEdge Rack Enclosure 4020S - Manual (Page 31)

Installation Guide
29
Securing the Rack Leveling Feet
WARNING:
Read all statements below before you adjust the leveling feet.
• The Energy Smart rack must be positioned above the perforated tiles.
• Your rack includes four leveling feet, which are mounted near the corners
of the rack frame.
• The leveling feet are designed to align the rack in an upright, level position
when the rack is placed on a slightly uneven floor surface.
• Before you install your systems in the rack, adjust the leveling feet.
• Adjust the leveling feet after the rack is properly placed and the brushes
surround the perforated area.
WARNING:
When you adjust the leveling feet, ensure that the casters on each
corner of the rack do not rise more than 5.0 mm (3/16") above the floor. If you
exceed 5.0 mm of clearance between the floor and the casters, slowly retract the
leveling feet, and then move the rack to another location that requires minimal
adjustments to the leveling feet.
WARNING:
Adjust the leveling feet until each leveling foot rests firmly on the
floor. Proper contact with the floor ensures that each leveling foot is supporting
the weight of the rack and prevents the rack from swaying in any direction. If the
leveling feet are not all in firm contact with the floor, the rack can become
unstable and tip over.
WARNING:
Do not attempt to move your rack with the leveling feet deployed.
Always retract the leveling feet before moving the rack. Having the leveling feet
deployed when you move the rack may cause the rack to tip over.
WARNING:
Always level the rack and install the stabilizer feet before you install
your systems. A fully loaded rack may tip over if your rack is not resting on an even
floor surface and the leveling and stabilizer feet are not supporting the weight of
the rack.
NOTE:
If the rack is not leveled properly, you may not be able to install the stabilizer
feet, which are necessary to prevent the rack from tipping over.
NOTE:
Ensure that all brushes are installed to maintain cooling efficiency.
1 Using a screwdriver, lower the leveling foot until it rests on the floor.
2 To lower the foot further, tighten the hex nut clockwise with a 12 mm
wrench. See Figure 16.
3 Repeat step 1 and step 2 for the remaining leveling feet.
4 Ensure that the rack is level.