System Sensor DH500ACDC Contents Of The Duct Detector Housing Kit, Installation Sequence

Page 2

Figure 1:

CONDUIT HOLES

DUCT DETECTOR

HOUSING

 

FOAM

INLET SAMPLING TUBE

GASKETS

(SUPPLIED SEPARATELY)

TUBE

END

PLUG

See Note 1 below for inlet sampling tube and detector supply information.

O-RINGS

DETECTOR BASE

HOUSING

MOUNTING SCREWS

EXHAUST

FILTER ADAPTER

DETECTOR HEAD

(SUPPLIED SEPARATELY)

SAMPLING TUBE

PC BOARD

INSULATOR

DUCT DETECTOR

COVER

SAMPLING TUBE

MOUNTING

SCREWS

TEST MAGNET

FILTERS

H0309-00

The DH500ACDCs are built to operate on 120/240 VAC or 24 VAC/DC. Two form-C (SPDT) relay contacts are avail- able for control purposes. Two LEDs on each detector latch on to provide a local alarm indication. Remote alarm indi- cation is made possible by using the auxiliary alarm output (see Figure 5). The duct detector can be tested and alarm can be reset by using the correct respective code commands from the panel. See panel instructions for details.

Contents Of The Duct Detector Housing Kit

The DH500ACDC Air Duct Detector Housings consist of the following items: (See Figure 1.)

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 foam gaskets.

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

9.One filter adapter.

10.One inlet tube end plug.

11.Two #10 speed nuts.

NOTE: The inlet sampling tube must be ordered separately. 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. A smoke detector head (1551 ionization or 2551 for photoelectronic) must be ordered separately.

Installation Sequence

Page

Step 1. Verify duct air flow direction and velocity

............2

Step 2. Drill the mounting holes

2

Step 3. Mount duct housing

3

Step 4. Install the inlet tube

3

Step 5. Complete the field wiring

5

Step 6.

Install the filters

7

Step 7.

Perform detector check

7

Step 8.

Install the cover

9

Step 9.

Perform the final system check (Testing)

9

Step 1. Verify Duct Air Flow Direction And Velocity The DH500ACDCA is designed to be used in air handling systems having air velocities up to 500 feet per minute. Be sure to check engineering specifications to ensure that the air velocity in the duct falls within these parameters. If necessary, use a velocity meter to check the air velocity in the duct.

Step 2. Drill The Mounting Holes

Remove the paper backing from the drilling template. Affix the template to the air duct at the desired mounting loca- tion. 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.)

Location of detectors mounted in or on air ducts should be at least six duct widths downstream from any duct openings, deflection plates, sharp bends, or branch con- nections.

D500-07-00

2

I56-432-11R

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Contents General Description Power Supply Electrical Ratings For DH500ACDCBefore Installing Drill The Mounting Holes Contents Of The Duct Detector Housing KitInstallation Sequence Mount Duct Housing Install The Inlet TubeInstallation for Ducts Less Than 8 Feet Wide Installation for Ducts More Than 8 Feet WideInstall the Filters Field Wiring Wiring Installation GuidelinesWiring Instructions Modification Of Inlet Sampling TubesD500-07-00 I56-432-11R MOD400R Sensitivity Test Alarm TestsPerform Detector Check Air Flow Trouble TestPerform the Final System Check Install the CoverPeriodic Maintenance Requirements Photo Units Ion UnitsAccessories RA400ZAThree-Year Limited Warranty Detector Test LOG

DH500ACDC specifications

The System Sensor DH500ACDC is a versatile and reliable heat detector that has gained a reputation for its advanced technology and robust features, making it an ideal choice for both commercial and residential fire safety applications. This heat detector is designed to enhance fire detection systems by providing accurate temperature monitoring and fast response times, thereby ensuring optimal safety for buildings and their occupants.

One of the standout features of the DH500ACDC is its dual power source capability, allowing it to operate seamlessly on both AC and DC power. This flexibility ensures that the detector continues to function efficiently even during power outages, making it an essential component of any comprehensive fire safety system. The ability to work with varied power sources maximizes its usability across different environments.

Equipped with a sophisticated thermal sensing element, the DH500ACDC is capable of detecting high temperatures or rapid rises in temperature. Its fixed temperature setting, combined with its rate of rise detection feature, enables it to quickly identify potential fire hazards. This dual mechanism significantly reduces the likelihood of false alarms while maintaining sensitivity to genuine threats.

The device is built for durability and reliability. Featuring a rugged construction, it is designed to withstand harsh environmental conditions, making it suitable for industrial settings, warehouses, and other challenging environments. Additionally, the detector's low-profile design allows for easy installation and minimal aesthetic disruption in any setting.

Another noteworthy characteristic of the DH500ACDC is its compatibility with various fire alarm control panels. This interoperability facilitates seamless integration into existing systems, enhancing overall functionality without the need for extensive modifications. This feature is particularly beneficial for organizations looking to upgrade their fire safety infrastructure.

Moreover, the DH500ACDC has undergone rigorous testing and complies with international standards, ensuring quality and performance that fire safety professionals can trust. Its comprehensive range of features, alongside its advanced technologies, make it a top choice for those seeking to enhance their fire detection capabilities.

In conclusion, the System Sensor DH500ACDC represents a significant advancement in heat detection technology. Its dual power source capability, sophisticated sensing mechanisms, rugged construction, and compatibility with fire alarm systems make it an indispensable tool in safeguarding lives and property against the dangers of fire. This detector embodies the commitment to safety that System Sensor is known for, providing peace of mind to users in various applications.
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