9. BATTERY MAINTENANCE
Perform the following tests at the recommended interval. Replace the battery set every four years or if
any of the test criteria are not met.
Initiation / Reacceptance
Charger Test—With the batteries fully charged and connected to the charger, measure the voltage
across the battery set. It must read 27.3V +/- 0.3V.
Discharge Test—With full system alarm load, the voltage on a fully charged battery must not fall
below 20.4V after 30 minutes.
Load Voltage Test—With full system alarm load, the voltage on a fully charged battery must not fall
below 24.6V after one minute.
Semiannually—Perform the Load Voltage Test.
Annually—Perform the Charger Test and Discharge Test.