Install supply side detectors at a point downstream from the supply fan and after the air filter.
Duct smoke detector installed.
Nor should it serve as an early warning detection system.
Both nfpa 90 and imc 606 2 1 state similar things that can be summarized and paraphrased as if the duct system is designed for more than 2000 cfm the system must have a duct smoke detector installed and if the duct system is designed for more than 15 000 cfm one in the return and supply is required.
A sampling tube must be ordered to complete the installation.
Nfpa 90a requires the first duct smoke detector to be installed on the supply side of air handler units of more than 2 000 cubic feet per minute cfm and requires one on the return side of units of more than 15 000 cfm and serving more than one story.
4 contents of the duct smoke detector kit 1.
Install return side detectors at a point before the return air stream is diluted by outside air.
With power source de energized and the smoke detector not installed wire all connections per engineering drawings.
Innovairflex duct smoke detectors combine an impressive collection of innovations to greatly simplify hvac system monitoring.
Hvac duct smoke detection.
Refer to the applicable figures below depending on your duct housing model number.
One unit can accommodate multiple installation footprints to overcome mounting constraints.
With all wiring in place install the detector head.
One sampling tube end cap 5.
Three 10 sheet metal screws for mounting 3.
Duct detectors smoke detection installation furthermore intentions for using duct smoke detectors should not be a substitute for area smoke detectors.
The duct smoke sensors are installed in the air duct system to detect any smoke in the duct.
One plastic exhaust tube note.
The international mechanical code imc specifies that if the space is air conditioned and the a c unit is over 2 000 cfm a duct smoke detector is required to be installed in the return air duct.
Tool free plug in sampling tubes speed and simplify installation.
Sensor power board assembly and cover s 2.
Duct smoke sensors are made to detect early smoke or combustion particles present in the air travelling through hvac passways.
Therefore they should complement the buildings fire detection system and not serve as the primary fire detection system.
It must be the correct length for the width of the duct where it will be installed.
