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Summary of Contents for Hochiki IFD-E
- Page 1 IFD-E Flame Detector User Manual...
- Page 2 Hochiki Europe (UK) Ltd General Description The flame detector is designed for use where open flaming fires may be expected. It responds to the light emitted from flames during combustion. The detector discriminates between flames and other light sources by responding only to particular optical wavelengths and flame flicker frequencies. This enables the detector to avoided false alarms due to such factors as flicking sunlight.
- Page 3 Hochiki Europe (UK) Ltd Application for Flame Detectors Flame detectors are used when detection is required to be: Unaffected by convection currents, draughts or wind Tolerant of fumes, vapours, dust and mist Responsive to a flame more than 25m away...
- Page 4 Hochiki Europe (UK) Ltd In fact, the flame detector will detect fires at distances of up to 40 metres, but the flame size at such distances needs to be proportionally greater in order to be sure of reliable detection. Thus the yellow flickering flame that can be detected at 25m, provided that its size is not less than 0.1m², will have to be...
- Page 5 Hochiki Europe (UK) Ltd Fig 3 Detector Field of View Plot The 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.
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Page 6: Electrical Connections
The cable is passed through the gland holes in the base of the detector. Note – When the IFD-E is used on a Conventional system a Fire Resistor will be required across the FLAME relay, the value of this resistor will be dependent on Control Panel, check with manufacturer. - Page 7 Hochiki Europe (UK) Ltd Fig 5b Electrical Connection Terminals (for Analogue system) 2-3-0-808/ISS1/APR07...
- Page 8 Hochiki Europe (UK) Ltd Fig 5c Electrical Connection Terminals (for Analogue system incorporating CHQ-POM Powered Output Module) NOTE: The CHQ-POM has a variable output, note this should be set at 30mA. 2-3-0-808/ISS1/APR07...
- Page 9 Hochiki Europe (UK) Ltd Connection Terminal Descriptions Terminal No. Mnemonic Function Power Supply +V. +IN is the power supply input to the flame detector and is normally 24Vdc with respect to terminal 2. The current consumption of detector can be monitored to determine the detector status (Fault, Normal, Pre-alarm, Fire).
- Page 10 Hochiki Europe (UK) Ltd Selectable Detector Functions (DIL Switch Settings) Fig 6 DIL Switch with Detector Front Cover Removed (Normal factory settings shown) Selectable Functions DIL Switch Settings Relay RL2 Function: RL2 off (No fault relay) – For lowest detector current consumption.
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Page 11: Theory Of Operation
Hochiki Europe (UK) Ltd Theory of Operation The detector responds to low-frequency (1 to 15 Hz.) flickering IR radiation emitted from flames during combustion. IR flame flicker techniques enable the sensor to operate through a layer of oil, dust, water vapour, or ice. -
Page 12: Connection Information
Hochiki Europe (UK) Ltd Connection Information NOTE 1 Screened cable should be used with one end of the screen connected to earth. Also care should be taken not to run the detector cable next to power cables. Fig 8 Basic 2 Wire Connection Diagram The simplest method of connecting the flame detector is in a 2-wire configuration as shown above. - Page 13 Hochiki Europe (UK) Ltd Fig 9 4 Wire Connection Diagram NOTE 2 NOTE 3 R = To indicate fire to control unit or interface. EOL = End of line device required by some For example, 470R control units. This is required to monitor the cable to the detectors and prevent fault indications on the control unit.
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Page 14: Installation
Hochiki Europe (UK) Ltd Installation It is important that the detectors are installed in such a way that all terminals and connections are protected to at least IP20 with the detector cover fitted. The earth bonding terminals are provided for convenience where continuity of a cable sheath or similar if required. -
Page 15: Service And Repairs
Web: www.hochikieurope.com Hochiki Europe (UK) Ltd. reserves the right to alter the specification of its products from time to time without notice. Although every effort has been made to ensure the accuracy of the information contained within this document it is not warranted or represented by Hochiki Europe (UK) Ltd. to be a complete and up- to-date description.
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