Fire Detection Devices FDD CR-200 Heat Detector

The FDD CR-200 heat detector connected to a fire alarm system’s input circuit as an initiating device. The internal contacts normally open, and close when the detector operates either on a rate of temperature increase, or if the releasing temperature reached. Often installed with an addressing module if to be annunciated as a specific room or space; e.g. electrical room, garbage compactor, etc. With its non-metallic diaphragm, the detector can operate normally at low temperatures; making it suitable for nonheated or chilled environments including garages and carports. Because it responds to a rate of temperature increase, recommended tused in conjunction with sprinkler devices as the detector will initiate and alarm before the waterflow switch.

The FDD CR-200 Model Number prefix “CR” indicates that the detector is a combination Rate-of-Rise and Fixed Temperature; often referred to as “Dualaction”, unit. The Rate-of-Rise function allows the detector to close its contacts when the temperature at the ceiling increases at a rate of 8.4 Celsius degrees per minute. The closure of the contacts initiates the Fire Alarm sequence. The Fixed Temperature portion consists of a spring-loaded plunger held in place by a eutectic solder; that will fuse at the specific temperature as indicated by the Model Number i.e. 135, 165, 200 and 285 degrees.