Battery Maintenance - Siemens PAD-3 Installation, Operation And Maintenance Manual

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
1. 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.
2. Discharge Test—With full system alarm load, the voltage on a fully charged battery must not fall
below 20.4V after 30 minutes.
3. Load Voltage Test—With full system alarm load, the voltage on a fully charged battery must not fall
below 24.6V after one minute.
Testing Interval
1. Semiannually—Perform the Load Voltage Test.
2. Annually—Perform the Charger Test and Discharge Test.
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