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Installation 24
IMPORTANT: Charge the batteries for at least 24 hours before supplying backup power to
devices. The batteries charge to:
• 80 percent of their capacity within 3 hours
• 100 percent of their capacity within 48 hours
Starting power to the load
Start power to the load by placing the UPS in Operate mode (on page 27).
IMPORTANT: AC power must be available the first time the UPS is started.
Installing the ERM
Before installing the ERM, review and observe all warnings in "Precautions (on page 11)."
WARNING: Uneven mechanical loading in the rack may cause a hazardous condition
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.
1. Install the mounting rails ("Installing the mounting rails" on page 12).
2. With one person on each side of the carton, lift the chassis and lower it to the floor in front of the
rack.
3. Install the mounting ears on the chassis using the screws provided.
4. With one person on each side, lift the chassis to rail level and slide the chassis on the mounting rails.
5. Attach the chassis to the rack using the supplied screws.
6. If using the rear mounting brackets, be sure that the bracket tabs are fully inserted into the rear panel
cutouts, then tighten the brackets.