What is the battery type and size required for the FENWALNET 6000, and what is the replacement procedure?

The FENWALNET 6000 requires sealed, lead-acid batteries only (Page 36) [1].

The standard cabinet accommodates two 12 AH batteries, though the system supports up to 70 AH if an external battery enclosure (P/N 74-600000-014 or -514) is used (Page 27, 36) [1].

Batteries must be replaced every three years or more frequently if recommended by the manufacturer (Page 161) [1].

Replacement Procedure:

1. Isolate all releasing outputs and physically disconnect wiring to initiators, control heads, and solenoid valves (Page 161) [1].

2. Turn off the AC branch circuit and disconnect the existing battery leads (Page 1, 36) [1].

3. Install two new 12V batteries in series (Page 48) [1].

4. Connect the battery cable to Terminals TB3 on the main printed-circuit board, strictly observing polarity (Page 48) [1].

5. Restore AC power and verify the system returns to normal operation (Page 197) [1].