E-PDD Duct Smoke Detector Installation Sheet

Transcription

1 E-PDD Duct Smoke Installation Sheet 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. Figure 1: Jumper setting Table 1: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 Installation WARNINGS 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 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 UTC Fire & Security. All rights reserved. 1 / 6 P/N REV 0 ISS 8JAN13

2 Installation guidelines 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. 3. The sampling is normally installed from the rear, but it can also be installed from the front of the detector as shown in Figure 3. This method requires that you remove the detector cover. Figure : Duct detector assembly socket Exhaust socket Verify the duct air velocity In order to verify airflow direction and velocity, air must be moving through the HVAC system. 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. 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 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: Exhaust Thin gasket Figure 3: installation connector Thick gasket Plug Coupling (ordered separately) Model Description SD-T8 8-inch sampling SD-T18 SD-T4 SD-T36 18-inch sampling 4-inch sampling 36-inch sampling (fully assembled) SD-T4 SD-T60 SD-T78 SD-T10 48-inch sampling 60-inch sampling 78-inch sampling To assemble the detector: 10-inch sampling 1. Assemble the duct smoke detector as shown in Figure.. Rotate the air sampling so the inlet holes face the direction of airflow. 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. / 6 P/N REV 0 ISS 8JAN13

3 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 Figure 4. Figure 4: Duct detector installation 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 Specifications for available address numbers. Figure 6: Duct detector address HVAC duct Insert screwdriver here Set jumper JP3 to appropriate position. Refer to Operation. Figure 5: support #10 sheet metal screw (X) 11. Verify the air pressure differential value falls within the specified operating range of the detector in accordance with procedures specified in 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 Maintenance and testing. Maintenance and testing Verify the air pressure differential: HVAC duct Exhaust 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 Figure 7. Sealant Plug. Verify that the air pressure differential measured falls within the specified operating range of the detector. 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. 36 in 7. Verify that all field wiring is free of opens, shorts, and ground faults. 8. Make all wiring connections as shown in Wiring. 9. Set the module address as follows: P/N REV 0 ISS 8JAN13 3 / 6

4 Figure 7: Air pressure differential opening HVAC duct Exhaust opening Air pressure differential meter 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, and then connect the SLC wiring. 8. Test the detector and verify sensitivity. For details, refer to Technical Bulletin P/N Figure 8: Duct detector cleaning Testing the duct smoke detector 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 Replacement parts The following table lists the replacement parts for the duct smoke detector. HVAC duct housing Optic plate 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. Wiring Retainer clip Optic housing 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 Figure 9. 4 / 6 P/N REV 0 ISS 8JAN13

5 Figure 9: Duct detector wiring Remote alarm/active indicator [1] Alarm/active + Auxiliary equipment [] or Remote test station [1] Alarm/active Test SLC( ) SLC( + ) SLC( ) SLC( + ) 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. P/N REV 0 ISS 8JAN13 5 / 6

6 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 Accessories SD-TRM SD-TRK SD-MAG SD-VTK R-LED 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) 100 to 4,000 ft./min 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 3 to 1 F (0 to 50 C) 0 to 93% RH, noncondensing 14 to AWG wire 01 to 64 (64 point control panel) 01 to 17 (17 point control panel) Remote test-reset station, magnetic Remote test-reset station, keyed Test magnet kit Air velocity test kit Remote LED alarm indicator 6 / 6 P/N REV 0 ISS 8JAN13