System Sensor 5622 Dual-Circuit Fixed/Rate-of-Rise Heat Detector

Overview

The System Sensor 5622 is a dual-circuit fixed/rate-of-rise heat detector designed for fire alarm system installations. Operating at 35VDC, this detector combines fixed-temperature sensing (detects sustained elevated temperatures) with rate-of-rise capability (responds to rapid temperature changes). This dual approach handles both slow, smoldering fires and fast-developing events — critical in commercial and industrial environments where fire development speed varies by location and fuel type.

Compatibility

The 5622 integrates with fire alarm control panels and conventional addressable systems that support 35VDC heat detectors. Confirm your fire alarm panel manufacturer's compatibility list before ordering — heat detector wiring and supervision requirements vary across control panel brands and series. Installation is appropriate for commercial buildings, warehouses, industrial facilities, and institutional environments where area heat detection is required as part of a monitored fire alarm system.

Installation Notes

Mount the detector on ceiling surfaces or in air ducts according to NFPA 72 spacing and placement standards for heat detectors. Ensure 35VDC power and supervisory wiring are properly run to your fire alarm control panel. Do not install in areas subject to ambient temperatures below 32°F (0°C) or above 100°F (37.8°C), as these conditions affect detector calibration and response. Confirm wiring gauge and supervision loop configuration with your fire alarm system documentation — improper circuit design prevents alarm transmission.