E-PDD Duct Smoke Installation Sheet E-PDD 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. The duct smoke detector is designed for use in duct applications where temperatures can exceed standard detector capabilities. Air is introduced to the duct smoke detector's sensing chamber through a sampling that extends into the HVAC duct and is directed back into the ventilation system through an exhaust. The difference in air pressure between the two s pulls the sampled air through the sensing chamber. When a sufficient amount of smoke is detected in the sensing chamber, the duct smoke detector notifies the fire alarm control panel. The device address is set using the two rotary switches located on the front of the unit. One device address is required. The detector is capable of performing comprehensive selfdiagnostics and storing the results. In installations where the duct smoke detector s controls and indicators are hidden from view, a remote test station or an LED indicator can be connected to the detector to provide these functions. Jumper setting operation The following jumper settings determine the operation of the detector. Jumper setting Jumper settings 3 1 JP3 Setting Operation Description 1- Alarm Factory Default: Configures the detector for alarm latching operation -3 Supervisory Configures the detector for supervisory operation LED operation The detector provides two LEDs, visible from the front side of the detector, that show its status. LED Power LED Alarm/active LED Description Off when the detector is in the alarm state Flashes intermittently when the detector is in the normal state Indicates the detector is in the alarm/active state as follows: Flashes at a continuous rate if the first detector is in alarm/active Flashes intermittently if not the first detector in alarm/active P/N 310110 REV 1.0 ISS 05OCT07 1 of 7
E-PDD installation WARNINGS The duct smoke detector is not intended as a substitute for open area protection. This detector will not operate without electrical power. As fires frequently cause power interruption, you should discuss further safeguards with your local fire protection specialist. The duct smoke detector will not operate as designed outside of the listed electrical and environmental specifications. The duct smoke detector will not sense smoke unless the ventilation system is operating and the sensor s cover is properly installed. The duct smoke detector may not operate as designed unless installed in accordance with these instructions and all applicable national and local codes as determined by the local authority having jurisdiction. Note: Read these instructions thoroughly before installing. In addition to this document, important information can be found in Technical Bulletin P/N 31011. 3. If the air velocity does not fall within the specified range, relocate the detector and seal the hole in the HVAC duct. Refer to Technical Bulletin P/N 31011 for additional information pertaining to installation locations. Select the appropriate sampling : Select a sampling that extends at least two-thirds across the width of the duct. For duct widths greater than 36 inches, use a sampling that is longer than the width of the duct. s are available in the following lengths: Model SD-T8 SD-T18 SD-T4 SD-T36 SD-T4 SD-T60 SD-T78 Description 8-inch sampling 18-inch sampling 4-inch sampling 36-inch sampling 48-inch sampling 60-inch sampling 78-inch sampling Installation guidelines SD-T10 10-inch sampling To ensure correct operation, install the duct detector using the following guidelines: Install the duct smoke detector on a flat section of HVAC duct between six and ten duct widths from any bends or obstructions. Install supply-side detectors at a point downstream from the supply fan and after the air filter. Install return-side detectors at a point before the return air stream is diluted by outside air. Verify the duct air velocity In order to verify airflow direction and velocity, air must be moving through the HVAC system. To assemble the detector: 1. Assemble the duct smoke detector as shown in the illustration.. Rotate the air sampling so the inlet holes face the direction of airflow. 3. The sampling is normally installed from the rear, but it can also be installed from the front of the detector as shown in the illustration. This method requires that you remove the detector cover. To verify the duct air velocity: 1. Drill a small hole at the point where the duct smoke detector is being installed.. Using the SD-VTK Air Velocity Test Kit and a suitable air velocity meter, verify that the air velocity in the HVAC duct falls within the specified operating range of the detector and note which direction the air flows. of 7 P/N 310110 REV 1.0 ISS 05OCT07
Duct detector assembly socket Exhaust socket 5. Mount the duct smoke detector on the HVAC duct and secure it using two sheet metal screws provided. 6. If using an air sampling that is longer than the width of the duct, cut the so that approximately one inch of the extends through the duct. Seal the opening around the with an approved duct sealant as shown in the illustration. Exhaust Duct detector installation Thin gasket Thick gasket HVAC duct Coupling (ordered separately) Plug installation #10 sheet metal screw (X) connector support HVAC duct Exhaust (fully assembled) Sealant To install the detector: 1. Attach the drill template to the HVAC duct at desired mounting location.. Drill (or punch) the mounting holes where indicated. Note: s longer than 36 inches must be supported at both ends of the duct. 3. If using an air sampling that is longer than the width of the duct, drill a 3/4-inch hole on the opposite side of the duct for to pass through. 4. Remove any rough edges from the holes. Plug 36 in 7. Verify that all field wiring is free of opens, shorts, and ground faults. P/N 310110 REV 1.0 ISS 05OCT07 3 of 7
8. Make all wiring connections as shown in E-PDD wiring. 9. Set the module address as follows: Use a screwdriver to adjust the two rotary switches on the front of the module. Set the TENS rotary switch (0 through 1) for the 10s and 100s digit and the ONES rotary switch for the 0 through 9 digit. For example: device address 1, set TENS rotary switch to and set the ONES rotary switch to 1. Refer to E-PDD specifications for available address numbers. Duct detector address 3. If the air pressure differential measured does not fall within the specified operating range of the detector, make sure the sampling air holes are not obstructed and are facing the HVAC system airflow. Air pressure differential HVAC duct Exhaust opening Insert screwdriver here 4 5 6 3 1 0 7 8 9 10 1 11 3 4 5 6 7 1 8 0 9 10. Set jumper JP3 to appropriate position. Refer to E-PDD operation. 11. Verify the air pressure differential value falls within the specified operating range of the detector in accordance with procedures specified in E-PDD maintenance and testing. 1. After completing installation of the duct smoke detector, test the detector to ensure it is operating correctly in accordance with procedures specified in E- PDD maintenance and testing. E-PDD maintenance and testing Verify the air pressure differential: In order to verify air pressure differential, air must be moving through the HVAC system. To verify the air pressure differential: 1. Connect a suitable air pressure differential meter to the sampling and exhaust openings as shown in illustration.. Verify that the air pressure differential measured falls within the specified operating range of the detector. opening Testing the duct smoke detector Air pressure differential meter After completing installation of the duct smoke detector, test the detector to ensure it is operating correctly prior to leaving the site. For details, refer to Technical Bulletin P/N 31011. Replacement parts The following table lists the replacement parts for the duct smoke detector. Model E-SDPCB Description Cleaning the duct smoke detector PCB replacement kit for duct smoke detector Clean the duct smoke detector when it becomes 80% to 99% dirty or sooner if conditions warrant. Caution: Before cleaning the duct smoke detector, notify the proper authorities that the fire alarm system is undergoing maintenance and take steps to prevent the control panel from responding to a false alarm. 4 of 7 P/N 310110 REV 1.0 ISS 05OCT07
To clean the duct smoke detector: 1. Disable the detector/zone to prevent false alarms.. Remove the detector s cover then power down the detector by disconnecting the SLC wiring. 3. Using a vacuum cleaner, clean compressed air, or a soft bristle brush, remove loose dirt and debris from inside the detector housing and cover. 4. Remove dirt and other contaminants from the gasket on the detector s cover using isopropyl alcohol and a lint-free cloth. 5. Squeeze the retainer clips on both sides of the optic housing then lift the housing away from the printed circuit board. 6. Gently remove dirt and debris from around the optic plate and inside the optic housing. 7. Replace the optic housing and detector cover, then connect the SLC wiring. 8. Test the detector and verify sensitivity. For details, refer to Technical Bulletin P/N 31011 Duct detector cleaning HVAC duct housing Optic plate Retainer clip Optic housing P/N 310110 REV 1.0 ISS 05OCT07 5 of 7
E-PDD wiring Wire in accordance with NFPA 7 and CAN/ULC S54. Be sure to observe the polarity of the terminals on the terminal block as shown in the diagram. Duct detector wiring Remote alarm/active indicator [1] Alarm/active + Auxiliary equipment [] or Remote test station [1] Alarm/active Test 1 3 4 11 10 9 SLC( ) SLC( + ) SLC( ) SLC( + ) 4 5 6 3 1 0 7 8 9 10 1 11 3 4 5 6 7 1 8 0 9 8 7 6 5 4 3 1 3 1 JP3 Power indicator Alarm indicator Notes [1] No more than one remote test station or LED indicator can be connected to the detector at the same time. Wiring is unsupervised. Maximum wire resistance is 10 ohms per wire. [] Power-limited when connected to a power-limited source. If connected to a nonpower-limited source, all power-limited wiring in box must use FPL, FPLR, or FPLP cable or equivalent per NEC. 6 of 7 P/N 310110 REV 1.0 ISS 05OCT07
E-PDD specifications Communication line voltage Operating current Normal Alarm Inrush Common alarm relay/auxiliary equipment Air velocity Air pressure differential Smoke sensitivity range Smoke detection method Alarm test response time Dimensions Operating environment Temperature Humidity Wire size address Maximum 0 V peak-to-peak 45 µa 45 µa 1 ma Unsupervised and power-limited Quantity: 1 Type: Form C Ratings:.0 A at 30 VDC (resistive) or 0.5 A at 15 VAC (resistive) 100 to 4,000 ft./min 0.005 to 1.00 inches of water 0.79 to.46%/ft. obscuration Photoelectric (light scattering principle) 5 seconds 8.70 x 5.45 x 1.90 inches -0 to 158 F (-9 to 70 C) 0 to 93% RH, noncondensing 14 to AWG wire 01 to 64 (64 point control panel) 01 to 17 (17 point control panel) Accessories SD-TRM SD-TRK SD-MAG SD-VTK R-LED Remote test-reset station, magnetic Remote test-reset station, keyed Test magnet kit Air velocity test kit Remote LED alarm indicator P/N 310110 REV 1.0 ISS 05OCT07 7 of 7