System Sensor DH500 Manual

3825 Ohio Avenue, St. Charles, Illinois 60174 FAX: 630-377-6495 AND MAINTENANCE INSTRUCTIONS Intelligent Air Duct Smoke Housing Temperature Range: Humidity Range: Air Velocity: Ratings for DH500 Range: Current (nominal): Surge at Max. Voltage: current (nominal): cm) cm) cm) kg) inches inches inches lbs. to 120 (0 to 49 to 93% Relative Humidity 4000 ft./min. (91.4 1219.2 m/min.) 32 VDC Peak at 24 VDC at 24 VDC Installing thoroughly read System Sensor’s Guide for Proper of Smoke Detectors in Duct Applications (I56-473-XX), provides detailed information on detector spacing, zoning, wiring, and special applications. Copies this manual are available from System Sensor. NFPA 72 and 90A should also be referenced for information. This manual should be left with the owner/user this equipment. This detector must be tested and maintained following NFPA 72 requirements. The detector be cleaned at least once a year. Description HVAC system supplies conditioned air to virtually every of a building. Smoke introduced into this air duct sys- will be distributed to the entire building. Smoke detec- designed for use in air duct systems are used to sense presence of smoke in the duct. DH500 Air Duct Detector Housings are used with Sensor intelligent model 1551 ionization detector and model 2551 photoelectronic detector head. These principal smoke detection methods are combined with efficient housing design that samples air passing through duct and allows early detection of a developing hazardous When sufficient smoke is sensed, an alarm signal initiated at the fire control panel monitoring the detector, appropriate action can be taken to shut off fans and change over air handling systems, etc. This can the distribution or isolation of toxic smoke and fire throughout the areas served by the duct system. LEDs on each detector latch ON to provide a local indication. There is also a remote alarm output for with auxiliary devices. The DH500 has remote test with the RTS451/RTS451KEY Remote Test of the Duct Detector Housing Kit DH500 consists of the following items: (See Figure 1.) Note 1 on Page 2 for inlet sampling tube and detector information. Complete housing base and cover assembly. Two #10 sheet metal mounting screws. Two sampling tube filters. One test magnet. Drilling template. Two 5/16-inch O-rings. Two rubber tube bushings seals. Four #6 self-tapping mounting screws for the sampling One filter adapter. One inlet tube end plug. Four #6×7/10 cover mounting screws. Two #10 speed nuts. One test coil and parts bag. 1: SAMPLING TUBE SEPARATELY) STRIP HOLES DETECTOR DETECTOR TUBE BASE SCREWS ADAPTER HEAD SEPARATELY) MAGNET TUBE 1: The inlet sampling tube must be ordered separate- It must be the correct length for the width of the where it will be installed. See Table 1 to deter- the inlet tube required for different duct Smoke detector heads (1551, ionization; photoelectronic) must be ordered separately. Sequence 1. Verify duct air flow direction and velocity 2. Drill the mounting holes 3. Secure the housing base to the duct 4. Install the inlet sampling tube 5. Field wiring 6. Install the filters and check pressure differential 5 7. Perform detector check 8. Install the cover 9. Perform the final system check (Testing) 2. Drill the Mounting Holes the paper backing from the top and bottom of the Affix the template to the air duct at the desired location. Make sure the template lies flat and on the air duct. Center punch hole targets and the template. Drill the holes as indicated on the Slide the two speed nuts ov