Abus FU8340 Mode D'emploi page 21

Functional principle and features
The detector works optically in order to detect smoke. A light transmitter and
light receiver are both installed in the measurement chamber. Both are
separated by an intermediate wall. No optical connection is made between the
transmitter and receiver when no smoke is present in the chamber. Penetrating
smoke disperses the light so that it hits the receiver. This triggers the detector.
The detector is also equipped with a temperature gauge. The detector also
triggers when the temperature exceeds 65 °C.
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Monitoring area: ca. 40 m² within a room
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Automatic battery state monitoring
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Battery compartment check (detector can only be installed when the
battery is fitted)
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Optical (LED) and acoustic (piezo) alarm
Position
The human sense of smell is not active whilst sleeping, meaning that bedrooms,
nurseries and entrance halls should be monitored in particular. However, at
least one smoke detector should be fitted outside the bedroom.
Due to the especially high risk of fires, entrance halls and corridors with regular
fire loads must be monitored using smoke detectors. In multi-storey houses, at
least one smoke detector should be fitted on each floor. In buildings with open
connections to several floors, at least one smoke detector should be fitted on
the top floor.
Always check whether the smoke detector and other alarm systems can be
heard clearly from the bedrooms.
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