Duct Smoke Detector Installation Detail

Nor should it serve as an early warning detection system.

Duct smoke detector installation detail.

It shows the components of the circuit as streamlined shapes as well as the power as well as signal links between the gadgets. Installation position for an fdbz492 pr duct smoke detector the following factors must be considered. A wiring diagram is a simplified traditional pictorial depiction of an electric circuit. This detection method when combined.

Air is introduced to the duct smoke detector s sensing chamber through a sampling tube that ext ends into the hvac duct and is directed back into the ventilation system through an exhaust tube. The difference in air pressure between the two tubes pulls the sampled air through the sensing chamber. This photoelectronic detector mounts externally to the duct with intake and exhaust sampling tubes penetrating into the duct. The sampling tubes may be ordered to a desired length or ordered in one of 3 standard lengths and cut per requirements.

Therefore they should complement the buildings fire detection system and not serve as the primary fire detection system. Smoke introduced into an air duct system will be distributed throughout the entire building. 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. Smoke detectors designed for use in air duct systems are used to sense the presence of smoke in the duct.

Typical smoke detection devices used for duct application include smoke detector sensors within a housing mounted outside the duct utilizing sam. This detector is recommended for ducts 6 inches and wider with duct velocities within the 500 fpm to 4000 fpm range. Must be present in the hvac duct. 6 sampling tube installation ing out of the duct select a shorter tube using 6 1 sampling tube selection.

When sufficient smoke is sensed an alarm signal is initiated and appropriate action can. The intake sampling tube consists of a piece of steel piping with a series of holes drilled the entire length of the tube and should extend the entire width of the duct. This detection method when com bined with an efficient housing samples air passing through the duct al lowing detection of a developing hazardous condition. Duct detectors smoke detection installation furthermore intentions for using duct smoke detectors should not be a substitute for area smoke detectors.

1 a uniform non turbulent laminar airflow between 100 ft min. Model d4120 and d4s duct smoke detectors utilize 4 wire photoelectric tech nology for the detection of smoke. Model d4120 and d4s duct smoke detectors utilize 4 wire photoelectric technology for the detection of smoke.