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TrueA/arm Sensors - � • : • - - . . - - . � TrueAlarm photoelectric sensors use a stable,pulsed Sealed against rear air flow entry infrared LED light source and a silicon photodiode Interchangeable mounting receiver to provide consistent and accurate low power smoke sensing. Seven levels of sensitivity are available EMI/RFI shielded electronics for each individual sensor,ranging from 0.2%to 3.7%per Heat sensors: foot of smoke obscuration. Sensitivity is selected and • Selectable rate compensated,fixed temperature monitored at the fire alarm controJ.panel. sensing with or without rate-of-rise operation The sensor head design provides 360°smoke entry for • Rated spacing distance between sensors: optimum response to smoke from any direction.Due to its Fixed Temp. UL&ULC FM Spacing,Either Fixed photoelectric operation,air velocity is not normally a setting spacing Temperature setting factor,except for impact on area smoke flow. 135°F 60 ft x 60 ft 20 ft x 20 ft(6.1 m)for fixed (57.2°C) (18.3 m) temperature only;RTI=Quick �.- 4-7/8"(124 mm) -� 50 ft x 50 ft(15.2 m)for fixed � 155°F 40 ft x 40 ft temperature with either rate-of-rise (68°C) (12.2 m) selection,RTI=Ultra Fast 0.--LE=D status indicator Smoke Sensors: 2-��$" (54 mm) • Photoelectric or ionization technology sensing • 360°smoke entry for optimum response • Built-in insect screens � � ' � ' - • 4098-9714 Photoelectric Sensor with Base TrueAlarm heat sensors are self-restaring and provide rate � � ' : ' • - • • compensated,fixed temperature sensing, selectable with or without rate-of-rise temperature sensing.Due to its TrueAlarm Ionization sensors use a single radioactive small thermal mass,the sensor accurately and quickly source with an outer sampling ionization chamber and an measures the local temperature for analysis at the fire inner reference ionization chambet•to provide stable alarm control panel. operation under fluctuations in environmental conditions such as temperature and humidity. Smoke and invisible Rate-of-rise temperature detection is selectable at the combustion gases can freely penetrate the outer chamber. control panel for either 15°F(8.3°C)or 20°F(11.1°C) With both chambers ionized by a small radioactive source per minute.Fixed temperature sensing is independent of [pm 241 (Americium)],a very small current flows in the rate-of-rise sensing and programmable to operate at circuit. The presence of particles of combustion will cause 135°F(57.2°C)or 155°F(68°C).In a slow developing a change in the voltage ratio between chambers.This fire,the temperature may not increase rapidly enough to difference is measured by the electronics in the sensor operate the rate-of-rise feature However,an alarm will be base and digitally transmitted back to the control panel for initiated when the temperature reaches its rated fixed processing. temperature setting. Three levels of sensitivity are available for each TrueAlarm heat sensors can be programmed as a utility ionization sensor: 0.5,0 9,and 1.3`%per foot of smoke device to monitor for temperature extremes in the range obscuration. from 32°F to 155°F(0°C to 68°C).This feature can provide freeze warnings or alert to HVAC system �. aais°(124 mm) -� problems.Refer to specific panels for availability. — �� 4-7/8"(124 mm) -� � II��LED status indicator — 2-1/8" (54 mm) Q'F--LED status indicator 2-3/8" (60 mm) 4098-9717 lonization Sensor with Base � . . . Sensor locations should be determined only after careful 4098-9733 Heat Sensor with Base consideration of the physical layout and contents of the area to be protected.Refer to NFP�72,the National Fire Alarm Code�'.On smooth ceilings,smoke sensor spacing WARNING: In most fires, hazardous levels of smoke of 30 ft(9.1 m)may be used as a guide.For detailed and toxic gas can build up before a heat detection application information,refer to 4098 Detectors, Sensors, device would initiate an alarm. In cases where Life Safety is a factor,the use of smoke detection is highly and Bases Application Manual(574-709). recommended. 3 S4098-0019-12 8/2008