Figure 10. Testing detector alarm:

 

Figure 11. Detector head removal:

 

DETECTOR

 

 

 

HEAD

 

 

 

 

 

DETECTOR

 

 

 

HEAD

 

 

 

TWIST

 

 

 

COUNTERCLOCKWISE

 

 

 

TO REMOVE

 

 

DUCT

 

 

 

HOUSING

 

TEST

TEST

RESET

 

MAGNET

 

LOCATOR

 

LOCATOR

PAINTED SIDE

 

 

 

 

TOWARD HOUSING

 

DUCT

 

 

 

 

 

 

HOUSING

 

 

 

TWIST

 

 

 

CLOCKWISE

 

 

 

TO INSTALL

 

 

H0250-00

H0251-00

[6.1] Smoke Entry Tests

[6.1.1] Air Flow

To verify sufficient sampling of ducted air, use a manometer to measure the differential pressure created from air flow across the sampling tubes. The pressure should measure no less than 0.01 inches of water and no greater than 1.20 inches of water.

[6.1.2] Smoke Response

To determine if smoke is capable of entering the sensing chamber, visually identify any obstructions. Plug the ex- haust and inlet tube holes to prevent ducted air from car- rying smoke away from the detector head, then blow smoke such as cigarette, cotton wick, or punk directly at the head to cause an alarm. REMOVE THE PLUGS AFTER TESTING OR THE DETECTOR WILL NOT FUNCTION PROPERLY.

[6.1.3] Filter Replacement

The filters do not substantially affect smoke behavior even when they are up to 90% clogged. Quarterly visual inspection is usually often enough to determine if filters should be replace because only a high percentage of con- tamination affects duct detector performance.

[6.2] Standby, Alarm, And Sensitivity Tests [6.2.1] Standby And Trouble

Standby- Check for the presence of the blinking red LEDs (blinks about every 10 seconds) through the transparent housing cover. If the APA451 ac- cessory is used, its green Power LED should be illuminated continuously.

Trouble- If the detector LEDs do not blink or if the APA451 Power LED is not illuminated, the detector lacks power (check wiring, panel, or power supply), the head is missing (install), or the unit is defec- tive (return for repair).

Test- The trouble condition can be caused intentionally to verify correct operation of the system. Remove power to the unit, remove the detector head (see Figure 11), or place the M02- 04-00 magnet into the Reset locator, as shown in Figure 10. These actions should cause a trouble condition locally and at the system control panel.

[6.2.2] Alarm Tests

[6.2.2.1] M02-04-00 Magnet Test

1.Place the painted surface of the magnet into the Test locator molded into the side of the housing (see Figure 10).

2.The red alarm LEDs on the detector should latch on, as should any accessories (PA400, RA400Z, RTS451, APA451). Verify auxiliary functions (such as fan shut- down) and system control panel alarm status.

3.Place the painted surface of the magnet into the Reset locator molded into the side of the housing (see Figure 10). This should clear the latched alarm condition at the detector. If a system control panel is used, the panel may also require resetting.

[6.2.2.2] RTS451/RTS451KEY Remote Test Station The RTS451/RTS451KEY Remote Test Station facilitates test of the alarm capability of the duct detector as indicated in

D400-13-00

9

I56-555-09R

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System Sensor DH400ACDCP specifications Smoke Entry Tests Air Flow, Smoke Response, Filter Replacement
Page 8 Page 10

DH400ACDCP specifications

The System Sensor DH400ACDCP is a cutting-edge addressable smoke and heat detector specifically designed for commercial and industrial applications. Its advanced detection capabilities ensure a high level of safety in various environments, making it an essential component of modern fire alarm systems.

One of the standout features of the DH400ACDCP is its dual-sensing technology. This device combines both smoke and heat detection in a single unit, allowing for a more comprehensive approach to fire safety. The smoke detection is performed using a photoelectric sensor, which effectively identifies smoldering fires that produce a large amount of smoke, while the heat detector is designed to respond to rapid temperature increases and fixed temperature thresholds. This dual functionality ensures early notification in the event of a fire, enabling timely response.

The DH400ACDCP also incorporates System Sensor’s innovative analytics technology. This feature utilizes advanced algorithms to minimize false alarms while maintaining sensitivity to actual fire threats. By analyzing environmental conditions and historical data, the detector can distinguish between normal activities and potential fire indicators, thus reducing unnecessary interruptions.

In terms of installation and maintenance, the DH400ACDCP is designed for ease of use. It features a robust addressable communication system, which allows for straightforward integration into existing fire alarm panels. The unit can be easily configured through the panel, providing flexibility in customizing notifications and response protocols. Its durable construction ensures reliability, while routine diagnostics capabilities help monitor device health and facilitate maintenance efforts.

Another significant characteristic of the DH400ACDCP is its compatibility with system monitoring and control platforms. The detector can report its status and any potential issues directly to centralized monitoring stations, enabling rapid response to emergencies or maintenance needs. By integrating with modern building management systems, the DH400ACDCP contributes to an overall intelligent safety infrastructure.

Overall, the System Sensor DH400ACDCP offers a cutting-edge solution for fire safety in various environments, combining advanced detection technology, ease of integration, and robust performance. With its focus on minimizing false alarms while ensuring reliable detection, the DH400ACDCP stands as a critical asset for maintaining safety in commercial and industrial spaces.
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