Figure 1:

 

CONDUIT HOLES

FOAM

INLET SAMPLING TUBE

GASKETS

(SUPPLIED SEPARATELY)

TUBE

END

PLUG

O-RINGS

DETECTOR BASE

HOUSING

MOUNTING SCREWS

EXHAUST

FILTER ADAPTER

DETECTOR HEAD

(SUPPLIED SEPARATELY)

SAMPLING TUBE

DUCT DETECTOR

HOUSING

TERMINAL STRIP

DUCT DETECTOR

COVER

SAMPLING TUBE

MOUNTING

SCREWS

TEST MAGNET

FILTERS

H0297-00

NOTE: The inlet sampling tube must be ordered sepa- rately. It must be the correct length for the width of the duct where it will be installed. See Table 1 to determine the inlet tube required for different duct widths. Smoke detector heads (1551, ionization; 2551, photoelectronic) must be ordered separately.

Installation Sequence

Page

Step 1.

Verify duct air flow direction and velocity

2

Step 2.

Drill the mounting holes

3

Step 3.

Secure the housing base to the duct

3

Step 4.

Install the inlet sampling tube

3

Step 5.

Field wiring

5

Step 6.

Install the filters and check pressure differential 5

Step 7.

Perform detector check

7

Step 8.

Install the cover

8

Step 9.

Perform the final system check (Testing)

8

Step 1. Verify Duct Air Flow Direction and Velocity The DH500 is designed to be used in air handling systems having air velocities of 500 to 4000 feet per minute. Be sure to check engineering specifications to ensure that the air velocity in the duct falls within these parameters. If neces- sary, an Alnor Model 6000-P velocity meter, Dwyer 460 dif- ferential pressure gauge, or their equivalent, may be used to check the air velocity in the duct.

Step 2. Drill the Mounting Holes

Remove the paper backing from the top and bottom of the template. Affix the template to the air duct at the desired mounting location. Make sure the template lies flat and smooth on the air duct. Center punch hole targets and remove the template. Drill the holes as indicated on the template. Slide the two speed nuts over the two small holes (Hole A) next to the sampling tube bushing holes (Hole B) previously drilled in the duct. (See Figure 2.)

Step 3. Mount Duct Housing

Remove the duct housing cover. Slide the foam gaskets over the tube bushings as shown in Figure 2B. Make sure the two small holes in the gaskets line up with the two base mounting holes. Put one 5/16-inch O-ring over each of the two #10 sheet metal screws. Use the two sheet metal screws to secure the duct housing to the duct.

CAUTION

Do not overtighten the screws.

D500-08-00

2

I56-512-07R

Page 2
Image 2
System Sensor DH500 specifications Installation Sequence, Drill the Mounting Holes, Mount Duct Housing

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.