Duct Smoke Detector Installed

Energize the duct detector.

Duct smoke detector installed. Innovairflex duct smoke detectors combine an impressive collection of innovations to greatly simplify hvac system monitoring. With all wiring in place install the detector head. Refer to the applicable figures below depending on your duct housing model number. Install return side detectors at a point before the return air stream is diluted by outside air.

Install supply side detectors at a point downstream from the supply fan and after the air filter. Install the duct smoke detector on a flat section of hvac duct between six and ten duct widths from any bends or obstructions. Tool free plug in sampling tubes speed and simplify installation. Therefore they should complement the buildings fire detection system and not serve as the primary fire detection system.

A sampling tube must be ordered to complete the installation. The air handling system which is installed in these sensors block the recirculation of smoke in such areas. 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. With power source de energized and the smoke detector not installed wire all connections per engineering drawings.

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. Sensor power board assembly and cover s 2. 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. It must be the correct length for the width of the duct where it will be installed.

Hvac duct smoke detection. One sampling tube end cap 5. Duct detectors smoke detection installation furthermore intentions for using duct smoke detectors should not be a substitute for area smoke detectors. Duct smoke sensors are made to detect early smoke or combustion particles present in the air travelling through hvac passways.

One plastic exhaust tube note. Three 10 sheet metal screws for mounting 3. One unit can accommodate multiple installation footprints to overcome mounting constraints.