Duct Smoke Detector Installation Instructions

Energize the duct detector.

Duct smoke detector installation instructions.

4 hole 3 feet upstream from the duct smoke detector. Smoke introduced into an air duct system will be distributed throughout the entire building. This detection method when combined. A heating ventilating or air conditioning hvac fan motor overheats and resulting smoke is sensed by the duct smoke detector installed in the main supply duct.

The duct smoke detector is equipped with an auxiliary relay. With power source de energized and the smoke detector not installed wire all connections per engineering drawings. To ensure correct operation install the duct detector using the following guidelines. If the air speed is greater than 500 fpm use a conventional manometer to measure differ ential pressure between the sampling tubes as described in 8 2 1.

The sl 2000 series duct smoke detector provides a unique patent pending mechanism for installation and or removal of the sampling and exhaust tubes from either the front or rear of the detector housing. To verify correct installation the pressure differential between the sampling high side and exhaust low side tubes should be measured using a magnehelic pressure gauge or equivalent. Model d4120 and d4s duct smoke detectors utilize 4 wire photoelectric tech nology for the detection of smoke. Install the duct smoke detector on a flat section of hvac duct between six and ten duct widths from any bends or obstructions.

2 6 p n 3101210 rev 02 iss 28jan13. 3 identify a code compliant location supply or return side or both for the installation of the duct unit that will permit easy access for viewing and serviceability. 6 sampling tube installation ing out of the duct select a shorter tube using 6 1 sampling tube selection. With the air handler on measure the air velocity with an anemometer.

Duct smoke detection can also serve to protect the air conditioning system itself from fire and smoke damage. Duct smoke detection may be useful in preventing injury and property dam age in instances such as the following. With all wiring in place install the detector head. Installation instructions for duct smoke detectors mounted on combination fire smoke or smoke dampers ii detector 04 12.

Do not overtighten the screws. Smoke detectors designed for use in air duct systems are used to sense the presence of smoke in the duct. Consult nfpa 90a nfpa 72 and local codes to determine where smoke detectors are required. 5 4 secure the duct detector to the duct use two rectangular configuration or three square configuration of the pro vided sheet metal screws to screw the duct detector to the duct.

The duct smoke detector units are designed to operate in duct widths from 6 to 10 wide with an air velocity between 500 to 4 000 feet per minute. Refer to the applicable figures below depending on your duct housing model number.