Model D-103

Demco Heat Detectors D-103 employ the principle of electrother-modynamics, the science of relation between heat and electro-mechanical works. They are professionally designed to work reliably with most fire detection system with central control equipment.

These units feature a double stage fire detection by employing two distinct methods: Rate-of-Rise and Fixed Temperature, both of which are open circuits designs designed to close an electrical circuit upon activation. The Demco Heat Detectors meet the requirement of UL521.

Advantages

  Double sensitivity (rate of rise & fixed temperature)
  Interchangeable base
  Easy installation
  Double terminal wire connector
  LED indication
  Low power consumption
  Wide voltage variation
  Auto reset (rate-of-rise mode)
  Durable
  Interchangeable base
     

Mode of Detection

  • RATE-OF-RISE

Being the first stage of detection, the Detector senses the rate-of-rise of temperature around its zone of coverage. When the rate of temper-ature increase exceeds 6 °C within 4 seconds, the Detector instantly switches from its normally open circuit to close circuit to activate the fire alarm. At the same time, the light emitting diode (LED) is illuminated indicating its active mode. It will remain active until the ambient temperature reduces substantially enough to automatically reset it back to its open circuit standby mode (dual detection mode).

Under normal day temperature fluctuations, the Detector remains in standby mode. The current consumption while in standby mode is nil, and changes to 1.5 mA when the Detector is activated.

  • FIXED TEMPERATURE

The Fixed Temperature method comes into action in cases of slow smoldering fire where the temperature does not increase at the rate that would trigger the Rate-of-Rise detection.

At any time when the temperature in the zone of coverage reaches a predetermined point which is factory calibrated, a snap action mechanism switches the Detector from its standby open circuit mode to close circuit mode permanently. Once this has taken place, the unit will not reset itself and the LED indicator will stay lighted. Replacement of the set is required.

 
SPECIFICATIONS
 
 
Download Reference
Model D-103    
 

Model D-223

DEMCO Single Station Photoelectric Smoke Detector D-223 is a battery operated, 9V single station smoke alarm specifically designed for residential and institutional applications including sleeping rooms of hospitals, hotels, motels, dormitories and other multi-family dwellings. It is designed to give early warning of developing fires by giving off an audible alarm from its built-in alarm horn. This provides precious time for escape before a fire spreads.

The D-223 features a solid-state surface-mount circuitry and are designed for low power consumption, precision and stability.

Advantages

  Easy to install - install directly to proper location without any wiring.
  Easy to maintain - minimum one year battery life under normal operation.
  Easy to test - the LED alarm indicator doubles as a test button - just press it for 2 seconds and hear the alarm sound to confirm that it is working in normal condition.
  Low battery warning - "unit beeps" every one minute for at least 7 days to indicate battery needs replacing.
     

D-223 SERIES

The D-223 series of photoelectric smoke detectors are desinged in accordance with UL217 and EN14604, and are manufactured under the best quality control.

This series also incorporates the reliability of UL-certified infrared components.

 
Other models in the D-223 series include detectors with additional features and functions.
PART NO. DESCRIPTION
D223 Photoelectric smoke detector (Tested by EN 14604,2005 Version)
D223-I Smoke detector, interconnection function (Tested by EN14604, 2005 Version)
D223-A-I Photoelectric smoke detector, Interconnection Function, AC 110/230V
D223-A-B-I Photoelectric smoke detector, Interconnection Function, AC 110/230V with battery backup
D223H Smoke and heat detector
D223H-I Smoke and heat detector, interconnection function
D223H-A-B-I Photoelectric smoke and heat detector, Interconnection Function, AC 110/230V with battery backup
SPECIFICATIONS
 
 
Download Reference
Model D-223    
 

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