User`s guide

Equipment Rack Precautions
133
Equipment Rack Precautions
Warning:
ANCHOR THE EQUIPMENT RACK: Theequipment rack must be anchoredto
an unmovable support to prevent it from falling over when one or more servers are
extended in front of it on slide assemblies. The anchors must be able to withstand a
force of up to 113 kg (250 lbs). You must also consider the weight of any other device
installed in the rack.
MAIN AC POWER DISCONNECT: You are responsible for installing an AC power
disconnect for the entire rack unit. This main disconnect must be readily accessible,
and it must be labeled as controlling power to the entire unit, not just to the server(s).
GROUNDING THE RACK INSTALLATION: To avoid the potential for an electrical shock
hazard, you must include a third wire safety grounding conductor with the rack
installation.Ifserverpower cords are plugged into AC outlets that are part of the rack,
then you must provide proper grounding for the rack itself. If server power cords are
plugged into wall AC outlets, the safety grounding conductor in each power cord
provides proper grounding only for the server. You must provide additional, proper
grounding for the rack and other devices installed in it.
Warning: Overcurrent protection: The server is designed for an AC line voltage
source with up to 20 amperes of overcurrent protection. If the power system for the
equipment rack is installed on a branch circuit with more than 20 amperes of
protection, you must providesupplemental protection for the server. Ifmore than one
serveris installed inthe rack, thepowersource for eachserver must befroma separate
branch circuit. The overall current rating of a server configured with three power
supplies is under 12 amperes.
Caution: Temperature: The operating temperature of the server, when installed in an
equipment rack, must not go below 5 ˚C (41 ˚F) or rise above 35 ˚C (95 ˚F). Extreme
fluctuations in temperature can cause a variety of problems in your server.
Ventilation:The equipment rackmustprovidesufficientairflow throughthefrontof the
server to maintainpropercooling. It mustalso include ventilationsufficientto exhaust a
maximum of 4,100 Btu’s per hour for the server. The rack selected and the ventilation
provided must be suitable to the environment in which the server will be used.