1806 SYSTEMSENSOR | Alldatasheet
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(eK BRK ELECTRONICS First in Fire Warning ¢ “ a LJ a | eries 4 ire te \\P Y” Systems Detectors | ¢ Compact, Stylish Design t ¢ Stable Unipolar lonization Sensing Chamber (DY) ) © Designed For Direct Surface or Electrical KG Box Mounting ¢ Unique Unipolar Dual Chamber Sensor ¢ Convenient Terminal Strip Wiring — Provides Uniform Response to Broad ¢ Built-in Test Switch Range of Fires ¢ Visual Alarm Indication — 1.5% Nominal Sensitivity ¢ Remote LED Option — Wind Gusts up to 2500 Feet per Minute ¢ Low Standby Current @ will not cause False Alarms ¢ Listed to UL 268 ° 6, 12, and 24 Volt Models ¢ Ideal for Residential and Commercial ¢ Twist-on Mounting Bracket with Tamper Applications Option for Easy Installation DETECTOR RESPONSE TO SMOLDERING FIRES BRK's new 1800 Series detectors have been designed to offer SHUM Sellen Rube maximum stability, ease of installation and a compact and DETECTOR aa attractive appearance. RESPONSE Sean The heart of these 1800 Series detectors is the new unipolar ‘i chat ¢ 5 BIRGUAR: ee ionization chamber. BRK has created a wide gulf between con- ~ set point) an ventional sensing technologies and this new advanced design. The LA unipolar chamber is approximately twice as responsive to smolder- Bipolar > ing fires when compared to conventional ionization detectors (see (eee than Oe — Hie mennalinwabvel Figure 1), but is still able to respond quickly to fast flaming fires. point) ig Foe a ay This allows the detector to be set less sensitive and further from (7 Belove: alate (ivect the threshold of alarm. Because of this new unipolar design, the az: 1800 Series detectors can be set at a sensitivity level comparable Vie ge. to most competitive photoelectric detectors (1.5% nominal). Figure 1 LEVEL OF SMOKE (im UL 268 smoldering tire) The 1800 Series are system type detectors designed for © BRK’s 669 series Remote Alarm Lamp Assemblies. All the use with four/six wire UL listed control panels. The 1806 1800 Series detectors draw less than 100 microamps dur- operates on 6 VDC, the 1812 on 12 VDC, and the 1824 ing normal operation. on 24 VDC. The sensitivity of the detectors is preset at Easy to install, clean, and maintain, these detectors are the factory and does not require adjustment in the field. Gesigned for direct surface mounting (twist-on mounting A solid state voltage regulator maintains detector sensi- bracket included), or for mounting to most boxes up to 4” tivity over a wide range of input voltages. Testing capability ctagonal, The units also feature convenient terminal strip Is incorporated in the detector which permits quick and wiring. For installation and maintenance instructions, see easy testing without sophisticated test equipment. A visual the |56-126-XX Manual and the 156-210-XX “Applications ® indication of an alarm is given by an LED on the detector Manual for System Smoke Detectors'’ for location and cover. This visible alarm signal may be remoted by using _pjacement of detectors.
BRK’s new unipolar ionization chamber Stable response to a broader range of fires! A unipolar dual chamber, ionization sensor region on top of the bipolar region found is more responsive to slow smoldering fires _in the bipolar chamber. (See figure 3.) I aia aii than a conventional bipolar sensor. In the presence of combustion particles, (jr |!) A bipolar sensor is able to detect a change —_a unipolar chamber reduces the current in \\ | lll) | ll in the chamber's ion current caused by the the bipolar region exactly as in the bipolar I i presence of combustion particles. These chamber but in addition, the combustion } {| ll 4 . particles act as recombination centers, as _ particles increase the negative field in the pS LI] ta both positive and negative ions attach unipolar region which reduces the strength G . tty ig md themselves to the surface of these com- of the field across the bipolar region. This - Te « oe ) bustion particles and recombine, which results in an additional reduction of current. SR oa a," decreases the current in the chamber. (See Tests have shown that unipolar sensors are Sey fi oh figure 2.) approximately twice as responsive as bi- — A unipolar chamber is larger than the bi- polar sensors in their signal change versus polar chamber and consists of a unipolar _increasing levels of smoke. (See figure 1.) BRK UNIPOLAR CHAMBER CONVENTIONAL BIPOLAR CHAMBER a. = — = WITHOUT SMOKE WITH SMOKE + t # | + ——° Unipotar! © {Negative nicoiar! | More ; _ "fsa “soe ol BR") ona Pobre Pag| tenn ' ; t= Ls es ae id o% / Ho} 6 eo: Bipolar} & 9% Extent | Bipolar |? Cx) o v 1 @ & % Pinoys 38 a H VJ Region; ~ @ 4 ota Region | 98 B ' H { ' H { ' particl H | Pd Pde! eas | 2d 9 doe | panic 16 @B bs! current in a bipolar ionization chamber. There are an equal The smoke particles increase the negative field in the unipolar re- number of + and = ions. With smoke, the ions recombine on gion, reducing the field in the bipolar region. This results in an addi- the smoke particles and reduce current flow. tional reduction of current TAMPER SLOT —_ < Specifications 1806 1812 1824 - ff Ml \\\\} Current Consumption | \\ Ly Alam (Max)... 160mA = 100mA «BSA Ne | j rest switch 1.25 Amps (Res.) 30VAC/VDC rh i Auxiliary Contacts . . SPDT—30W/50VA, 1.25 Amps | (Res.) 125VAC/100VDC RESISTANT —_ ee — AS recy yt? OQ] Condensation 2 4] - Wwe - U Visual Alarm Indicator . .Solid State Light-Emitting Diode ( 4 s[O ovn-our’— hitlas “Do How ta‘order y H ) Model Description S oy 1806 lonization Detector, 6VDC, for control panels. “Lp Ke A77-716-00— End of Line Relay Module, 6VDC. TD A77-669-01— Remote Alarm Lamp (LED) Assembly with rectangular mounting — plate; 6VDC. 1812 lonization Detector, 12VDC, for control panels. A77-716-01— End of Line Relay Module, 12VDC. A77-669-02— Remote Alarm Lamp (LED) Assembly with rectangular mounting k BRK ELECTRONICS plate: 12VD6. aeteal 1824 lonization Detector, 24VDC, for control panels. System Sensor Division A77-716-06— End of Line Relay Module, 24VDC.
780 McClure Road A77-669-03— Remote Alarm Lamp (LED) Assembly with rectangular mounting
Aurora, Illinois 60504 pinay SeVOR: ‘ 156-126-XX— Installation Instructions for 1800 series detectors. \\ Distributed by: 456-210-XX— Application Manual for System Smoke Detectors. i Printed in US.A c1806—12—24 6/85