H V A C S Y S T E M S M O N I T O R I N G Duct Smoke Detector for Special Applications Model 2451 with B404B/B404BT and RTC Remote Test Kit UL 268A (Requires RTC accessory) Product Overview Low standby current Two LEDs “blink” in standby Detector head plugs easily into base Field adjustable sensitivity Built-in test switch Field sensitivity metering of detector to meet the requirements of NFPA 72 120VAC and 24VAC/DC bases with built-in shorting spring Built-in tamper-resistant feature Designed for mounting on standard electrical box SEMS screws for easy wiring and positive wire retention Removable cover and insect screen for field cleaning 2451 with B404BT and RTC (Includes the RTS451) The System Sensor 2451 photoelectronic smoke detector is UL listed to UL 268A specifically for use in no-flow/low-flow air-handling systems. It’s designed for installations where a standard Venturi principle duct smoke detector is unsuitable. This is the perfect combination for installation in ducts where the air velocity is below 500 fpm or for duct sizes as small as 8 inches in diameter. Pendant mounted in a standard electrical box within the duct, the twist-in/twist-out head allows easy removal from the base for quick cleaning and maintenance. The detector can be combined with the System Sensor B404B 120VAC base or the B404BT 24VAC/DC base. Remote testing is accomplished using our Remote Test Coil accessory that includes the RTS451. The APA451, Remote Annunciator with Piezo Alarm, can also be connected to provide an audible and visible indication of smoke detector status. Specifications Operating Voltage/ Alarm current Mounting base dependent (see char t) Construction Flame retardant Nor yl plastic Standby current 120 mA maximum Operating Temperature 32° to 120°F (0° to 49°C) Sensitivity 3% ± .7% / ft. Humidity Range 10 to 93% RH non-condensing Weight 0.5 ib. (277 g) Air Velocity Rating 0 to 3000 fpm maximum Size 3.2˝/8.1 cm height 6.2˝/15.8 cm diameter Architectural/Engineering Specifications The air duct detector shall be a System Sensor model 2451 Series Smoke detector UL listed to UL 268A specifically for use in air handling systems when used in conjunction with the B404B (120VAC) or the B404BT (24VAC/DC) base. The detector shall operate at air velocities up to 3000 feet per minute. It shall be capable of local testing via magnetic switch or remote testing using the UL listed RTC Remote Test Coil accessory with the RTS451 Remote Test Station. It shall be capable of providing duct smoke detector status via the UL listed model APA451 Piezo Annunciator. Base Chart Base Model Version Loop Type Current Limit resistor Alarm Contact Type Nominal Voltage Alarm Current (mA) B404B UL/ULC 4-wire Yes Form A&C + A supy. 120VAC 20.4 B404BT UL 4-wire Yes Form A&C + A supy. 24VAC/DC rms 94 Junction Box Selection Base Model Single Gang 31/2˝ Oct. 4˝ Oct. 4˝ Sq. B404B No No Yes Yes No No No B404BT No No Yes Yes No No No 50mm 60mm 75mm Wiring Guide B404B Typical Wiring Diagrams: (+) EOL 2 14 5 1 13 12 120 VAC FIRE ALARM CONTROL PANEL RELEASING DEVICE 4 3 2 6 RA400Z (Optional) (–) 4 3 BLACK LEADS TRANSFORMER PRIMARY (+) RA400Z (Optional) (–) 7 8 9 10 14 5 1 13 SPECIFIED BY PANEL MANUFACTURER 12 120 VAC 11 6 7 8 9 10 11 ALARM INITIATION LOOP POWER RELEASING DEVICE RELEASING DEVICE POWER H0270-00 B404B Base Terminals No. RA400Z (Optional) Function 1 Remote Annunciator (+) 2 Not Used 3 Not Used 4 Remote Annunciator (-) 5 Not Used 6 N.O. 7 N.O. 8 N.O. 9 N.O. 10 C. 11 C. 12 N.O. 13 N.C. 14 C. 4 3 BLACK LEADS TRANSFORMER PRIMARY Supervisory Relay Form A Contacts EOL 2 14 5 1 13 SPECIFIED BY PANEL MANUFACTURER 12 6 Alarm Relay Form A Initiation Contacts Alarm Relay Form C Auxiliary Contacts 120 VAC FIRE ALARM CONTROL PANEL 7 8 9 10 11 ALARM INITIATION LOOP POWER FAN/DAMPER CONTROL H0271-00 B404BT Typical Wiring Diagrams: 3 APA451 2 1 (Optional) RELEASING DEVICE 4 3 3 APA451 2 1 (Optional) EOL 2 2 14 5 1 13 12 24 VACrms/DC 6 FIRE ALARM CONTROL PANEL RELEASING DEVICE 4 3 7 9 8 10 14 5 1 13 SPECIFIED BY PANEL MANUFACTURER 12 24 VACrms/DC 11 6 7 8 9 10 11 ALARM INITIATION LOOP H0268-00 NOTE: ABOVE DIAGRAM SHOWS NFPA REQUIRED WIRING OF SUPERVISED SYSTEMS. SCHEMATIC SHOWN BELOW FOR REFERENCE. 3 APA451 2 (Optional) 1 CT POWER SOURCE ROPRIATE TERMINALS H DETECTOR. SEE CATIONS FOR NAL POWER SUPPLY ATION. SUPERVISORY RELAY SUPERVISORY RELAY ALARM RELAY CONTROL PANEL ALARM RELAY 4 3 2 14 5 1 13 12 24 VACrms/DC 6 RING OF AUXILIARY S, REFER TO ACTURER'S ATION INSTRUCTIONS TACT MANUFACTURER. HE SUPERVISORY RELAY NOW ES A "FORM C" CONTACT FOR MIZED APPLICATIONS. ANDARD APPLICATIONS, ONLY " CONTACT IS USED 7 8 9 10 POWER 11 B404BT Base Terminals No. Function 1 Remote Annunciator (+) 2 Test Coil (+) 3 Not Used 4 Remote AnnunciatorEOL (-) 5 RTC (-) 6 N.O. 7 N.O. 8 N.O. 9 N.O. 10 C. 11 C. 12 N.O. 13 N.C. 14 C. SPECIFIED BY PANEL SupervisoryMANUFACTURER Relay Form A Contacts Alarm Relay Form A Initiation Contacts Alarm Relay Form C Auxiliary Contacts FAN / DAMPER SHUTDOWN RTC Ring Replacement of B404BT: H0269-00 RTC Wiring Diagram: B404B/B404BT REMOTE ANNUNCIATOR (+) TEST COIL (+) RTS451 1 1 2 2 3 4 EOL RESISTOR SPECIFIED BY PANEL MANUFACTURER RTC (–) TEST COIL 3 FIELD INSTALLED JUMPER 5 4 5 TEST COIL ALARM 4-POSITION TERMINAL BLOCK H0272-00 H0233-00 ALARM ALARM POWER RESET RTS451KEY Remote Test Station (provided with Remote Test Coil) APA451 Piezo Annunciator RA400Z Remote Annunciator Top Mount in Ventilation Shaft Ordering Information Part No. Description Accessories Description 2451 Photoelectronic plug-in detector (order one of the bases RTC Remote test coil kit (Includes RTS451 remote test station) listed below and the RTC) B404B 120VAC detector base APA451 Remote annunciator with piezo alarm B404BT 24VAC/DC detector base RA400Z Remote annunciator System Sensor Sales and Service System Sensor Headquarters 3825 Ohio Avenue St. Charles, IL 60174 Ph: 800/SENSOR2 Fx: 630/377-6495 Documents-on-Demand 800/736-7672 x3 www.systemsensor.com System Sensor Canada Ph: 905.812.0767 Fx: 905.812.0771 System Sensor in China Ph: 86.29.524.6253 Fx: 86.29.524.6259 System Sensor – Far East Ph: 85.22.191.9003 Fx: 85.22.736.6580 System Sensor Europe Ph: 44.1403.891920 Fx: 44.1403.891921 System Sensor in Singapore Ph: 65.273.2230 Fx: 65.273.2610 System Sensor – Australia Ph: 613.54.281.142 Fx: 613.54.281.172 © 2004 System Sensor. The company reserves the right to change product specifications without notice. System Sensor – India Ph: 91.124.2371770 x.2700 Fx: 91.124.237.3118 A05-0952-001•1/04•#1228