EST4 battery sizing is determined by calculating the total standby and alarm loads, adding a 20% safety factor, and selecting matched batteries (same manufacturer and date code) ranging from 10 Ah to 65 Ah (Page 76, 189) [1].
While the 3-PPS/M power supply can charge up to 65 Ah, the system can support up to 260 Ah using four power supplies (Page 21, 77) [1].
Batteries larger than 17 Ah must be housed in an external cabinet, such as the BC-1, located within three feet of the control unit (Page 76, 79) [1].
Replacement Procedure Batteries must be replaced every five years or sooner if they show signs of corrosion or leakage (Page 52, 135) [1].
Disconnect the existing battery set, then remove AC power (Page 253) [1].
Install the new batteries in the cabinet and secure them using the appropriate cross brackets (Page 1) [1].
Apply AC power to the control panel first; do not connect batteries until the panel is powered up (Page 145) [1].
Connect the battery wiring to the power supply terminals, ensuring all wires are the same length and gauge (Page 76, 77) [1].
Use the 4-CU software to configure the charging circuit for either 10-24 Ah or 30-65 Ah based on the installed set (Page 21) [1].
Verify the terminal voltage matches the battery manufacturer's specifications (Page 135) [1].
