Figure 9. RTS451/RTS451KEY test coil installation:

TEST COIL

DETECTOR

HEAD

Step 8. Install the Cover

Install the cover using the four screws. Be certain filters are installed as specified in Step 6. Make sure that the cover fits into the base groove and that all gaskets are in their proper positions. Tighten the four cover screws to 10 in/lbs.

Step 9. Perform the Final System Check

Place the magnet in position as shown in Figure 7. The LEDs on the detector should light. Any accessory LED(s) will also light. The system control panel should indicate an alarm condition.

Periodic Maintenance Requirements

Air duct smoke detectors should be maintained at least once a year. They should be maintained more often if the detector heads become obviously dirty in less than a year. The detectors must also be cleaned immediately after a fire. Failure to properly maintain air duct smoke detectors may cause unnecessary false alarms.

It is recommended that a permanent Detector Test Log be set up and maintained, with a record for each individual smoke detector in each building. Each detector should be clearly described, with information on the type of detector, the model number, the serial number (if any), the location, and the type of environment. Data entries should include test dates, type of test mode, test results, maintenance, and comments. A detector test log is included in this manual.

Recommended Detector Maintenance Procedure

NOTE: Notify the proper authorities that the smoke detec- tor system is undergoing maintenance, and there- fore the system will temporarily be out of service. Disable the zone or system undergoing mainte- nance to prevent unwanted alarms and possible dispatch of the fire department.

1.Turn off power to the system.

2.Remove and inspect sampling tube filters.

3.If filters are heavily coated with dirt, replace them with

H0292-00

new filters. If they are not heavily coated, use a vacuum cleaner or compressed air nozzle to remove dust, then reinstall the filters.

4. Remove detector from housing. (See Figure 8.)

Photo Units

5.Remove detector cover by inserting a small blade screw- driver into the slot located 90 degrees from the MOD400 test jack receptacle, twisting the cover counterclockwise to remove (see Figure 10).

6.Lift screen from photo chamber. Vacuum screen and cover before using clean, compressed air to loosen and blow out any remaining debris. (Replacement screens are available, part no. RS24.)

7.Vacuum photo chamber, then use clean compressed air to blow area clean.

8.Replace screen by aligning arrow on top with the field test slot on the base of the detector. Push screen into place. Screen should fit tightly to chamber.

Ionization Units

9.Remove the detector cover and screen assembly by depressing the three lock prongs on the top of the cover and rotating the cover counterclockwise. The CRT400 Cover Removal Tool makes cover removal easier. (See Figure 11.)

10.Carefully pull the screen out of the cover.

11.Clean the screen thoroughly with a soft brush or vacu- um (replacement screen available, part no. RS14).

12.Brush or vacuum the inside of the cover. Cover may then be blown out using clean, compressed air. DO

NOT APPLY WATER TO THIS AREA.

13.Vacuum the sensing chamber before using clean, compressed air to loosen and blow out any remaining debris. DO NOT APPLY WATER TO THIS AREA.

14.Press the screen back into the cover.

15.Replace the detector cover and screen assembly on the sensing chamber. Rotate it clockwise to lock it into place.

D500-08-00

8

I56-512-07R

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System Sensor DH500, Intelligent Air Duct Smoke Detector Housing specifications Photo Units, Ionization Units
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DH500, Intelligent Air Duct Smoke Detector Housing specifications

The System Sensor DH500 is an advanced intelligent air duct smoke detector housing designed to effectively monitor and detect smoke within HVAC ducts. As smoke detection in air handling systems is critical to ensuring the safety of occupants, the DH500 utilizes cutting-edge technology to provide reliable performance and early warning capabilities.

One of the main features of the DH500 is its intelligent detection capabilities. The device employs photoelectric sensing technology, which is well-suited for detecting the slow-burning fires that often generate more smoke than flames. This technology allows for prompt detection of smoke particles while minimizing false alarms caused by dust or other non-threatening particles. The DH500 is designed to operate efficiently in various environments, making it ideal for commercial and industrial settings.

The DH500 is equipped with a low-profile design, providing ease of installation and a more aesthetically pleasing appearance that blends seamlessly with existing ductwork. The housing is made from durable materials, ensuring long-lasting performance and resilience against environmental factors.

Another significant characteristic of the DH500 is its ability to accommodate multiple detectors. The housing can integrate with a variety of smoke detectors, allowing for installation flexibility depending on specific needs and applications. This modularity is particularly advantageous in large buildings where multiple air ducts may need simultaneous monitoring.

The device also incorporates advanced communication options, allowing for compatibility with various fire alarm control panels. This enables real-time monitoring and integration into broader building safety systems, enhancing overall emergency response capabilities. Moreover, the DH500 features an intuitive status indicator that provides visual confirmation of operational performance, making maintenance and monitoring straightforward.

In terms of maintenance, the DH500 is designed for easy access to the smoke detectors, ensuring they can be inspected and cleaned regularly, optimizing their efficiency and longevity. Regular maintenance plays a crucial role in the reliability of smoke detection systems, and the DH500's user-friendly design supports this essential function.

In summary, the System Sensor DH500 intelligent air duct smoke detector housing stands out for its intelligent detection technology, low-profile design, compatibility with multiple detectors, and advanced communication capabilities. Its durable construction and focus on ease of maintenance further enhance its appeal for commercial and industrial applications, making it a reliable choice for effective smoke detection in air handling systems.
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