• The FCA-350 series bases are designed specifically for use with Bosch’s conventional detectors including Photoelectric smoke, Photoelectric smoke with heat, and Fixed temperature/rate-of-rise heat detectors. • Each base is an electronics free 4” or 6” base featuring a plastic tamper-lock lug. Depending on local regulations, surface mount the bases using anchors, mollies, or wing nuts; or mount the bases directly on-three inch octagonal. • In a 2‑wire system, the maximum loop length depends on the number of detector bases on the loop, the wire size, and the control panel specifications. • Refer to the control panel's installation instructions for specific wiring information.
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