407 reflective beam line-type smoke detector
Installation and Service Manual
4
32-0061-r04_2020-10
© 2019, 2020 Ambest Electronics (Ningbo) Co Ltd. All rights reserved.
All specifications and other information shown were current at the date of publication and subject to change without notice.
2.4.2. Ceiling Heights
For ceiling heights up to 40 m, mount the transceiver (25 ~ 600) mm below the ceiling or roof (see Fig. 3).
Where detectors cannot be installed (25 ~ 600) mm below the ceiling or roof (eg due to the construction of
the structure or absence of suitable mounting points), install detectors more than 600 mm below the ceiling
or roof and reduce the spacing between beams to a quarter of the mounting height of the beam above the
floor.
Where more than one line-type smoke detector is installed, the distance between beams should not exceed
14.5 m. The maximum distance from any wall to the nearest beam should not exceed 7.2 m.
Where there is a risk that smoke may not rise to the ceiling or roof, additional detection may be provided at
intermediate heights. The distance between detectors mounted at intermediate heights should be a quarter
of the mounting height above the floor.
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