Duct smoke detector

One unit can accommodate multiple installation footprints to overcome mounting constraints. Tool-free, plug-in sampling tubes speed and simplify installation. The duct smoke detector samples air for early detection of smoke and products of combustion present in air moving through HVAC ducts.

A duct smoke detector is a device or group of devices used to detect the presence of smoke in the airstream of ductwork sections of the HVAC air handling systems typically used in commercial buildings. The DNR is an Intelligent non-relay photoelectric duct smoke detector for use with ONYX Series panels. The DNRW is a Watertight intelligent non-relay for use with ONYX Series panels. The FSL-751DNR is an Intelligent, high sensitivity duct smoke detector for use with ONYX Series panels. Both the IMC and NFPA 90A state that, if multiple air handlers serve the same area and the combined air volume is greater than 0cfm, detectors are required.

Model can accommodate exposure to wide humidity and temperature ranges, plus detector comes with highly visible status. In multi-story buildings at each story with a commonly shared return and having a capacity greater than 10CFM’s. What are the methods used to test duct smoke. Duct detectors grandfathered?

This Kidde 10-Year smoke detector is easy to This Kidde 10-Year smoke detector is easy to install and alerts your family when fire or smoke is detected in your home. Smoke alarms should be placed outside each sleeping area and on every level of the home. Do smoke detectors need a dedicated circuit? What do smoke detectors actually detect? How do you test a smoke detector?

What is a conventional duct detector? To zoom in, use the keyboard to focus on the arrow icon within the product image. Once it receives focus, use the arrow keys on the keyboard to move and position the product image. The zoom feature provides no benefit to users who are blind. An air duct smoke detector is a regular photoelectric smoke detector , only set up to monitor the air in a plenum, or air duct.

The way most photoelectric smoke detectors work is based on reflectivity. A Light Emitting Diode (LED) shines light into a black chamber so its light will be absorbed by the inside black walls. If smoke is detecte the device will close dampers, stop fans and blowers, and trigger an audible and visible signal at the fire control panel, Kapparos explains. These actions provide early detection, allow facility personnel to investigate the cause, and can protect the air conditioning system itself from fire and smoke damage. For HVAC systems with airflows exceeding 0cfm, duct smoke detectors are required.

This includes where multiple air handling systems utilize common ducts with a combined design capacity greater than 0cfm. INSTALLATION INSTRUCTIONS FOR THE DUCT SMOKE DETECTOR A. However, there has been a tendency to misapply these devices in the past by attempting to use them as a substitute for an early warning smoke detection system. The Simplex XAD Air-Sampling Smoke Detector is an excellent solution for challenging duct applications, as well as restricted areas such as elevator shafts, electrical equipment rooms hospital MRI rooms. This new duct smoke detector senses airflow speeds ranging from 1to 0feet per minute with proven System Sensor precision.

UL listed per UL 268A specifically for use in air handling systems. In most air return ducts, the duct smoke detector is placed after all air inlets, and before any filters, fresh air inlets or fans. On the supply side, the duct smoke detector is placed after the fresh air inlet, filter, conditioning area, and fan.

Therefore, filters would not be a factor. Detector must be mounted at least six duct widths from the fan or other sources of turbulence. The intake sampling tube has holes drilled the entire length of the tube and should extend the entire width of the duct.

The holes must be facing into the air flow. Cut the intake sampling tube to the desired length. The flexible housing of the duct smoke detector fits multiple footprints from square to rectangular.

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