Specifications

Removal and replacement procedures 10
These symbols, on power supplies or systems, indicate that the equipment is supplied
by multiple sources of power.
WARNING: To reduce the risk of injury from electric shock, remove all power
cords to completely disconnect power from the system.
Rack warnings and cautions
WARNING: To reduce the risk of personal injury or damage to the equipment, be sure
that:
• The leveling jacks are extended to the floor.
• The full weight of the rack rests on the leveling jacks.
• The stabilizing feet are attached to the rack if it is a single-rack installation.
• The racks are coupled together in multiple-rack installations.
• Only one component is extended at a time. A rack may become unstable if more than
one component is extended for any reason.
WARNING: To reduce the risk of personal injury or equipment damage when unloading
a rack:
• At least two people are needed to safely unload the rack from the pallet. An empty
42U rack can weigh as much as 115 kg (253 lb), can stand more than 2.1 m (7 ft)
tall, and may become unstable when being moved on its casters.
• Never stand in front of the rack when it is rolling down the ramp from the pallet.
Always handle the rack from both sides.
WARNING: To reduce the risk of personal injury or damage to the equipment,
adequately stabilize the rack before extending a component outside the rack. Extend
only one component at a time. A rack may become unstable if more than one component
is extended.
WARNING: When installing a server in a telco rack, be sure that the rack frame is
adequately secured to the top and bottom of the building structure.
Preparation procedures
To access some components and perform certain service procedures, you must perform one or more of the
following procedures:
• Extend the server from the rack ("Extending the server from the rack" on page 11).
If you are performing service procedures in a Compaq branded rack, telco rack, or third-party rack
cabinet, you can use the locking feature of the rack rails to support the server and gain access to
internal components.
For more information about telco rack solutions, refer to the RackSolutions.com website
(http://www.racksolutions.com/hp
).
• Power down the server ("Powering down the server" on page 11).
If you must remove a server from a rack or a non-hot-plug component from a server, power down the
server.
• Remove the server from the rack ("Removing the server from the rack" on page 12).
If the rack environment, cabling configuration, or the server location in the rack creates awkward
conditions, remove the server from the rack.