Heat Detectors-Conventional, Restoring

CR/CF Series heat detectors offer fixed temperature or combination rate-of-rise and fixed temperature detectors.

RATE-OF-RISE: A temperature increase at the sensor of 15°F (9°C) or more per minute activates the rate-of-rise feature. This closes the contacts in the sensor to transmit the alarm condition to the fire alarm control panel. When the rate-of-rise element alone has been activated, the sensor is self-restoring. 

FIXED TEMPERATURE: If the temperature of the center disk rises to the sensor’s rated temperature, the fixed temperature element activates. This closes contacts in the sensor and transmits an alarm condition to the fire alarm control panel. The fixed temperature element is non-restorable and, when activated, the detector must be replaced. The need for replacement is indicated when the center disk has fallen free from the detector. 

Heat detectors are most suitable for environments where rapid fire development can be expected. When selecting the location on the ceiling for the heat sensor, do not locate it in direct path of hot or cold air flow. Refer to the detector specifications for the recommended maximum spacing. Earlier detector response may be obtained by reducing the spacing between detectors. 

Standard Features

• UL listed for 70 ft. spacing (CR models only)
• Indoor applications only
• Two (2) isolated normally open contacts rated at 3A 125Vac; 1A 28Vdc; 0.3A 125Vac; 0.1A 250Vdc
• Low profile
• Aluminum finish
• Mounting flexibility with screw terminals
• Positive operating indication — for fixed temperature element
• Agency Listings: UL, ULC, CSFM