The 5600 series mechanical heat detector is intended for use in property protection applications, or for non-life-safety installations where smoke detection is not practical or appropriate.

The 5600 series consists of both single- and dual-circuit heat detectors featuring fixed temperature thermal sensors or combination fixed temperature/rate-of-rise sensors, with temperature ratings of 135ºF (57ºC) or 194ºF (90ºC).

Markings on the exterior of the detector indicate the specific activation method and temperature rating. All models are identified as either 135ºF/57ºC or 194ºF/ 90ºC. Models equipped with combination fixed temperature/ rate-of-rise sensors are marked FX/ROR. Fixed temperature only models are marked FX.

The fixed temperature element reacts to heat by responding to a specific temperature setting (135ºF or 194ºF). The detection method is based on the spring action of a metal contact, held to the metal chamber by a fusible alloy. When the temperature reaches the alloy’s melting point, the metal contact will depress the diaphragm, causing the electrical contact to close the circuit. The circular external heat collector is released from the detector to visually indicate that the detector has been activated.

NOTE: 5600 series Fixed Temperature models (5603, 5604, 5623, and 5624) are non-resettable, and cannot be tested.