Installation 14
• Hex nuts
• Cage nuts
• Cage nut-fitting tool
Selecting a site
WARNING: To prevent fire or electric shock, install the unit in a temperature- and humidity-
controlled indoor environment, free of conductive contaminants.
When selecting a site, consider the following factors:
• Elevated operating ambient temperature—If the equipment is installed in a closed or multi-unit rack
assembly, the operating ambient temperature of the rack environment might be greater than room
ambient temperature. Install the equipment in an environment compatible with the operating
temperature ("Environmental specifications" on page 61).
• Reduced air flow—In the rack, the rate of air flow required for safe operation of the equipment must
not be compromised.
• Circuit overloading—Consideration should be given to the connection of the equipment to the supply
circuit and the effect that overloading of the circuits might have on overcurrent protection and supply
wiring. Appropriate consideration of equipment nameplate ratings should be used when addressing
this concern.
• Reliable earthing—Reliable earthing of rack-mounted equipment should be maintained. Particular
attention should be given to supply connections other than direct connections to the branch circuit,
such as the use of power strips.
• Electrical requirements—All models require a dedicated (unshared) branch circuit, suitably rated for
the specific UPS as stated in "Input specifications ("UPS input specifications" on page 59)" .
Readying the equipment
1. Check the battery recharge date specified on the label that is affixed to the shipping carton.
IMPORTANT: Do not use the battery if the recharge date has passed. If the date on the
battery recharge date label has passed without the battery being recharged, contact an HP
authorized service representative for directions.
2. Transport the packaged unit to its installation location.
3. Unpack the equipment near the rack where the unit will be assembled.
CAUTION: Always plan the rack installation so that the heaviest item is on the bottom of the
rack. Install the heaviest item first, and continue to populate the rack from the bottom to the
top.
Installing the mounting rails
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