Duct Smoke Detector Sampling Tube Installation

Duct smoke detector a.

Duct smoke detector sampling tube installation.

Move duct housing sampling tube assembly to desired location. Ensure that the sampling tube is angled downward from the duct smoke detector to allow for moisture drainage away from the detector. 3 contents of the duct smoke detector kit 1. Once any sampling tube length adjustments are made plug the end of the sampling tube with the provided end cap.

The end cap is needed to cre ate the proper air flow to the sensor of the duct smoke detector. Drilling template 4. Use 4 mounting screws 4 12 x 1 2 sheet metal screws packaged in installation kit to secure the housing to the air duct. Ensure that the sampling tube is angled downward from the duct smoke detector to allow for moisture drainage away from the detector.

Verify this by checking specifications of installation and if necessary use an alnor model 6000p velocity meter or equivalent to check the air velocity. The difference in air pressure between the two tubes pulls the sampled air through the sensing chamber. The sampling tube should be angled at least 1 4 downward for every 12 of duct width per figure 4. The sampling tube should be angled at least 1 4 downward for every 12 of duct width per figure 4.

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. See figure 12 for sensor and controller dimensions. Drill a 3 4inch hole in the duct opposite the hole already cut for the sampling tube. Sensor power board assembly and covers sensor head is factory installed 2.

The sampling tube end cap included with the detector is critical to proper operation of the duct smoke detector. To ensure correct operation install the superduct duct smoke detector using the following guidelines. Sampling tube connectors are equipped with set screws which allow the tubes to be mounted only in directions shown in figure 2. Locate the sensor so its sampling tube is positioned in a straight length of square duct between six and ten duct widths from any bends or obstructions as shown in the diagram below.

Drill a 3 4inch hole in the duct opposite the hole already cut for the sampling tube.