INSTALLATION AND MAINTENANCE INSTRUCTIONS

DH500 Intelligent Air Duct Smoke Detector Housing

3825 Ohio Avenue, St. Charles, Illinois 60174 1-800-SENSOR2, FAX: 630-377-6495 www.systemsensor.com

Specifications

 

 

Length:

14.5 inches

(36.7 cm)

Width:

5 inches

(12.7 cm)

Depth:

3.5 inches

(8.9 cm)

Weight:

2.8 lbs.

(1.1 kg)

Operating Temperature Range:

32° to 120°F (0° to 49°C)

Operating Humidity Range:

10% to 93% Relative Humidity

Duct Air Velocity:

500 – 4000 ft./min. (91.4 – 1219.2 m/min.)

Electrical Ratings for DH500

 

 

Voltage Range:

14.5 – 32 VDC Peak

Standby Current (nominal):

150uA at 24 VDC

Power-Up Surge at Max.

 

 

Rated Voltage:

1.5mA-sec.

 

LED current (nominal):

6mA at 24 VDC

 

 

 

Before Installing

Please thoroughly read System Sensor’s Guide for Proper Use of Smoke Detectors in Duct Applications (I56-473-XX), which provides detailed information on detector spac- ing, placement, zoning, wiring, and special applications. Copies of this manual are available from System Sensor. NFPA Standards 72 and 90A should also be referenced for detailed information.

NOTICE: This manual should be left with the owner/user of this equipment.

IMPORTANT: This detector must be tested and maintained regularly following NFPA 72 requirements. The detector should be cleaned at least once a year.

General Description

An HVAC system supplies conditioned air to virtually every area of a building. Smoke introduced into this air duct sys- tem will be distributed to the entire building. Smoke detec- tors designed for use in air duct systems are used to sense the presence of smoke in the duct.

The DH500 Air Duct Detector Housings are used with System Sensor’s intelligent model 1551 ionization detector head and model 2551 photoelectronic detector head. These two principal smoke detection methods are combined with an efficient housing design that samples air passing through a duct and allows early detection of a developing hazardous condition. When sufficient smoke is sensed, an alarm signal is initiated at the fire control panel monitoring the detector, and appropriate action can be taken to shut off fans and

blowers, change over air handling systems, etc. This can prevent the distribution or isolation of toxic smoke and fire gases throughout the areas served by the duct system.

Two LEDs on each detector latch ON to provide a local alarm indication. There is also a remote alarm output for use with auxiliary devices. The DH500 has remote test capability with the RTS451/RTS451KEY Remote Test Station.

Contents of the Duct Detector Housing Kit

The DH500 consists of the following items: (See Figure 1.)

See Note 1 on Page 2 for inlet sampling tube and detector supply information.

1.Complete housing base and cover assembly.

2.Two #10 sheet metal mounting screws.

3.Two sampling tube filters.

4.One test magnet.

5.Drilling template.

6.Two 5/16-inch O-rings.

7.Two rubber tube bushings seals.

8.Four #6 self-tapping mounting screws for the sampling tube.

9.One filter adapter.

10.One inlet tube end plug.

11.Four #6x7/10 cover mounting screws.

12.Two #10 speed nuts.

13.One test coil and parts bag.

D500-08-00

1

I56-512-07R

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System Sensor Intelligent Air Duct Smoke Detector Housing specifications Specifications, Electrical Ratings for DH500
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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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