Hochiki DRD-E User Manual download pdf (Page 8)

Page 8 of 12 DRD-E Flame Detector Installation Manual

2-3-0-1376/ISS1/NOV10

3.1 Field of View

The DRD-E flame detector has a field of view of approximately 90°, as shown in the diagram below.

Fig 4 : Conical field of view of the flame detector

Fig 5 : Detector Field of View Plot

The DRD-E flame detector should be positioned at the perimeter of the room, pointing directly at the

anticipated flame or at the centre of the area to be protected. If the detector cannot ‘see’ the whole of the

area to be protected, one or more additional detectors may be required.

The DRD-E flame detector is not affected by normal light sources but should be positioned so that sunlight

does not fall directly onto the viewing window.

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Hochiki DRD-E User Manual Page 8