Duct Detector Test Switch Location

Firstly it is important to follow all the instruction provided with the new duct detector. The duct detector should when possible be located a minimum of six duct widths downstream from a source of turbulence bends inlets or deflection plates. Yes if the duct detector cannot be reset at the facp or annunciator then a separate test reset station will need to be installed for resetting the duct detector per nfpa 72 section 23 8 5 4 6 4.

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The duct smoke detector latches into alarm state when an alarm occurs.

Duct detector test switch location.

Innovairflex duct smoke detectors combine an impressive collection of innovations to greatly simplify hvac system monitoring. For 4 wire detectors the rts151key test station features a multi colored led that alternates between steady green and red. Detectors should not be mounted in areas of extreme high or low temperatures in areas where high humidity exist or in areas where duct air may contain gases or excess dust. The international mechanical code section 606 2 2 also states that unless multiple air han dling systems share common supply or return air ducts or plenums duct detection is not required in the supply air system.

For 2 wire detectors the led illuminates red for alarm. The rts151 and rts151key remote test stations are automatic fire detector accessories designed to test duct smoke detectors from a convenient location. The duct smoke detector is designed for use in duct applications where temperatures can exceed standard detector capabilities. Wiring diagrams for duct smoke detectors.

The wiring diagram graphics here are for illustration purposes only. The d4120 and d4p120 leds indicate the status of power maintenance trouble and local alarm conditions. 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. Since the requirement for tying in duct detectors is in 907 fire alarm and detection systems the duct detector rule 907 11 doesn t apply to what you re doing.

One unit can accommodate multiple installation footprints to overcome mounting constraints. Duct smoke detectors should be located in the hvac area between 6 and 10 duct equivalent diameters of straight uninterrupted run. The d4120 and d4p120 can be reset by a momentary power interrup. Tool free plug in sampling tubes speed and simplify installation.

Cover magnet activated test switch or by the optional remote test station. Hvac duct smoke detection. Always follow duct detector manufactures instructions and code for wiring.

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