Installation  26 
 
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 38). 
 
 
IMPORTANT: AC power must be available the first time the UPS is started. 
 
 
Installing the UPS as a tower 
Before installing the unit, review and adhere to all warnings provided in "Precautions (on page 13)." 
 
Connecting the battery leads 
 
 
WARNING: To prevent personal injury from electric shock or damage to the equipment, 
remove the battery lead labels, and verify that the ERM circuit breakers are in the Off 
position.