D340 Installation Guide EN Duct Smoke Detector Housing
D340 | Installation Guide | 1.0 Overview Trademarks The National Fire Alarm Code® is a registered trademark of the National Fire Protection Association. 2.0 D340 Options Table 1: D340 Options Life Safety Code® is a registered trademark of the National Fire Protection Association. 1.0 Overview The D340 Air Duct Smoke Detector Housing is designed to mount to the ducts of heating, ventilation, and air-conditioning (HVAC) systems to monitor the presence of smoke in the conditioned air.
D340 | Installation Guide | 4.0 Sample Tubes . Figure 2: 4.0 Sample Tubes The sample tubes must extend across the width of the duct. The three sizes of sample tubes are: • D344-1.5 (1.5 ft [0.46 m]) • D344-3 (3 ft [0.91 m]) • D344-5 (5 ft [1.52 m]) Sample tubes include an end plug that must be installed in the narrow end of the tube (Figure 1). Figure 1: D344-1.5 Sample Tube 2 1 1 - Set screw 2 - End plug You can combine or cut sample tubes to make different lengths.
D340 | Installation Guide | 5.0 Mounting 5.0 Mounting 5.2 5.1 The D340 can be mounted in any direction of 90° increments without regard to the air flow direction (Figure 6). Preparing the Duct You must verify the duct air flow and velocity. The D340 is designed for use in air handling systems with air velocities between 300 ft/min and 4000 ft/min (1.5 m/sec to 20.3 m/sec). Check the HVAC engineering specifications to ensure the air velocity in the duct falls within these parameters.
D340 | Installation Guide | 5.0 . 1. This attaches the jack nuts to the duct. You might have to hold the jack nuts with a installer wrench or a pair of pliers while tightening the screws to stop the jack nut from spinning in the hole. Remove the screws for later use. Locate the D340 mounting template (Figure 7) and remove it from its backing. Figure 7: D340 Mounting Template 7.
D340 | Installation Guide | 5.0 Mounting Figure 12: Wiring Knockout Locations 1 2 1 1 - Wiring Knockouts (5) 6 2 - Earth ground screw Bosch Security Systems, Inc.
D340 | Installation Guide | 5.0 . 10. Locate the sample and exhaust tubes (Figure 13). Ensure the sample tube has a plug installed at the narrow end of the assembly. Mounting 13. Secure the tubes in place using the tube clamps provided (Figure 16). Figure 16: Sample and Exhaust Tubes in D340 Figure 13: Exhaust and Sample Tubes 1 1 2 2 4 3 4 3 1 - Exhaust tube 2 - Leave end open 1 - Exhaust tube 2 - Sample tube 3 - Sample tube 4 - Insert plug 11. Note the direction of the airflow in the duct.
D340 | Installation Guide | 6.0 Selecting the Jumper Figure 20: Reset Jumper w/Remote Display Units 6.0 Selecting the Jumper 6.1 Location Figure 18 shows the locations of the tamper and reset jumpers on the power card. Figure 18: Jumper Locations 2 1 1 1 - Disabled 2 B B R L R E K N D O Y G B R E R L N L N U 3 Tamper Reset Disable Disable Disable the Reset jumper whenever you are not using the D344-RT (D307). 1 2 3 4 5 6 7 8 7.0 Wiring 7.
D340 | Installation Guide | 7.0 Wiring . 7.3 D340 Two-Wire D344-RT (D307) NFPA-72 requires that where in-duct smoke detector housings are installed in concealed locations more than 10 ft (3 m) above the finished floor or in arrangements where the detector’s alarm indicator is not visible to responding personnel, the detectors have remote alarm indicators. 7.4 Do not exceed a distance of 500 ft (150 m) between the D344-RL (D306) Remote Indicator Plate and the D340. Use 18 AWG (1.2 mm) or larger wire.
D340 | Installation Guide | 7.0 Wiring Figure 24: DRA-5 Wiring 2 4 1 3 5 (+) (-) 14 13 12 OUT IN 11 10 9 ALARM 14 13 12 11 10 9 6 7 1 - Optional external power (24 VAC/VDC) 2 - Remote LED 3 - Loop (+) 10 4567- Loop (-) DRA-5 White wire Red wire Bosch Security Systems, Inc.
D340 | Installation Guide | 7.0 Wiring . 7.6 D340 to Control Panel Figure 25: D340 to Control Panel Wiring 1 B B R L R E K N D O Y G R E R N L N B B R L R E K N D B L U 1 2 3 4 5 6 7 8 Tamper Reset Disable Disable O Y G B R E R L N L N U 1 2 3 4 5 6 7 8 Tamper Reset Disable Disable 2 - + 1 4 1 3 1 2 11 1 0 9 1 4 1 3 1 2 11 1 0 9 3 1 - Control panel 2 - Alarm Initiating loop 7.
D340 | Installation Guide | 8.0 Installation Testing 8.0 Installation Testing Verify the air flow to ensure the system is properly operating. Use a manometer to verify the correct velocity pressure readings ranging from 300 ft/min to 4000 ft/min (1.5 m/sec to 20 m/sec). The pressure differential between sampling tubes is a minimum of 0.01 in. (0.25 mm) of water to a maximum of 1.8 in. (45.7 mm) of water. 1.
D340 | Installation Guide | 10.0 Specifications . 10.0 Specifications Table 2: D340 Specifications Option D275 Description End-of-line (EOL) module Option D344-RL Description Remote LED Indicator Kit (D306) D285DH Photoelectric smoke detector head D344-TF Tube filters for sample and exhaust tubes (20 per package) D344-1.5 1.5 ft (0.5 m) sample tube SMK-TM Test magnet D344-3 3 ft (1 m) sample tube DRA-5 Remote alarm indicator D344-5 5 ft (1.
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