{"product_id":"system-sensor-apa451-duct-smoke-detector-remote-annunciator","title":"System Sensor apa451 Duct Smoke Detector Remote Annunciator","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SYSTEM SENSOR apa451 is a remote annunciator designed for use with duct smoke detectors in commercial HVAC systems. It provides a local audible and visual alarm indication at a convenient mounting location away from the duct detector itself, allowing building personnel and HVAC technicians to quickly identify alarm conditions without accessing the duct housing directly. The unit operates on 16 to 33 volts DC and is equipped with a piezo alarm for audible notification. Wire connections accept 12 to 18 AWG wire gauge. Licensed HVAC and fire alarm contractors typically handle installation and commissioning of this device.\u003c\/p\u003e\u003cp\u003eThe apa451 is suited for commercial and industrial HVAC installations where duct smoke detection is required by fire codes or building specifications. It mounts remotely from the duct detector, making it useful in mechanical rooms, corridors, or air handling unit enclosures where direct detector access is limited. The annunciator gives on-site personnel a clear alarm signal without requiring them to locate the duct-mounted sensor head.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePiezo alarm provides audible alert at the remote annunciator location\u003c\/li\u003e\n\u003cli\u003eOperating voltage range of 16 to 33 volts DC accommodates standard fire alarm panel power supplies\u003c\/li\u003e\n\u003cli\u003eAccepts 12 to 18 AWG field wiring for installation flexibility\u003c\/li\u003e\n\u003cli\u003eUL S4011 listed for use in duct smoke detection applications\u003c\/li\u003e\n\u003cli\u003eCompact form factor at 2.9 inches wide, 45 inches deep, and 4.6 inches tall\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style remote annunciator for use with compatible duct smoke detector units in commercial HVAC fire detection systems. Verify compatibility with the specific duct detector model before installation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed fire alarm or HVAC technician in accordance with NFPA 72 and local authority having jurisdiction requirements. Disconnect and lock out all power to the fire alarm circuit before wiring the annunciator. Confirm wire gauge and polarity requirements match the connected duct detector and panel specifications before energizing the system. Do not install in environments outside the rated voltage range of 16 to 33 volts DC.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e: 16 to 33 volts DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum DC Voltage Rating\u003c\/strong\u003e: 24 volts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlarm Current\u003c\/strong\u003e: 30 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWire Gauge\u003c\/strong\u003e: 12 to 18 AWG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 2.9 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth\u003c\/strong\u003e: 45 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 4.6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApproval\u003c\/strong\u003e: UL S4011\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SYSTEM SENSOR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: apa451\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SYSTEM SENSOR","offers":[{"title":"Default Title","offer_id":51138794553650,"sku":"APA451","price":40.94,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/305531097.jpg?v=1778263479","url":"https:\/\/voomisupply.com\/products\/system-sensor-apa451-duct-smoke-detector-remote-annunciator","provider":"Voomi Supply","version":"1.0","type":"link"}