Nor should it serve as an early warning detection system.
Duct smoke detector connection.
Air enters the detector s sensing chamber through a sampling tube ordered separately that extends into the duct and is directed back into the ventilation system through an exhaust tube.
Nfpa 72 also states that a duct smoke detector is not allowed to replace an area smoke detector mainly because if the air handling unit ahu is not running the detector would not detect smoke.
The detector assembly cover provides easy access to the smoke sensor its wiring connections sample and exhaust tube fittings and the smoke chamber itself.
The duct smoke detector is designed for use in duct.
Duct detectors aren t a replacement for room sensors.
Install the duct smoke detector on a flat section of hvac duct between six and ten duct widths from any bends or.
It reveals the elements of the circuit as streamlined shapes and also the power and also signal connections between the devices.
Typical smoke detection devices used for duct application include smoke detector sensors within a housing mounted.
A duct smoke detector should shut off a typical blower and fresh air and turn on the exhaust.
E pdd duct smoke detector installation sheet operation the duct smoke detector s primary purpose is to provide early warning of an impending fire and shut down the hvac unit in order to prevent smoke from circulating throughout the building.
Assortment of duct smoke detector wiring diagram.
Furthermore intentions for using duct smoke detectors should not be a substitute for area smoke detectors.
Therefore duct smoke detectors are typically considered mechanical equipment devices instead of life safety devices.
Features 4 wire photoelectric integrated low flow technology air velocity rating from 100 ft min to 4 000 ft min 0 5 m s to 20 32 m sec.
Duct smoke detector the innovairflex series are the only duct smoke detectors flexible enough to fit configurations from square to rectangular and everything in between.
Therefore they should complement the buildings fire detection system and not serve as the primary fire detection system.
How to installation air duct smoke detector.
