Polon-Alfa DOP-6001R, Installation And Maintenance Manual

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9 DESIGN RECOMMENDATIONS
The DOP-6001R beam smoke detector operates properly, similarly to all other smoke detectors, in case it is
installed at the height not exceeding 12 m. When it is mounted higher (up to 20 m), another row of
detectors shall be provided at an intermediate level, with adequately larger number of detectors.
Maximum width (2D) of an area protected by one detector depends on the room height, according to the
following table:
Height
H
Operation radius
D
Distance from ceiling
At gradient up to 20 ° At gradient over 20 °
Up to 6 m 6 m 0.2 m to 0.5 m 0.3 m to 0.5 m
From 6 to 12 m 6.5 m 0.3 m to 0.7 m 0.4 m to 1.0 m
Over 12 m 7 m 0.6 m to 0.9 m 0.8 m to 1.2 m
The maximum area protected by one detector in case the detector/reflector panel distance is 100 m for the
ceiling height at 10 m amounts to (2D x 100 m) ca. 1300 m
2
, so the detector can replace a dozen of spot
smoke detectors.
The distance between the detector IR beam and a side wall of room should not exceed D value and
between two adjacent detector beams
– 2D. The distance from the IR beam to any obstacle (e.g. a wall,
perpendicular to a side wall) shall not be smaller than 0.5 m.
The beam detector should constantly “see” the co -operating reflector, it is necessary to install it in such a
way that its optical path is never – even temporarily – concealed by a moving object or equipment, such as
cranes, hoists, etc. In the premises where people stay, the minimum installation height should amount to
2.7 m (so that outstretched upwards arms do not disturb the optical path). This limitation is not valid in the
case of low, long or narrow spaces where people do not stay, e.g. cable channels, spaces above hanging
ceilings, etc.
NOTE: The data listed in the table, especially the D operation radius value, which depends on a roof height
come out from the calculations of the proportion of the beam detector arrangement versus spot detectors
installed in a fire test chamber and comply with the data pursuant to VdS 2095:2005.
It differs from the data stated in the PKN-CEN/TS 54-14 technical specification in which the D radius is the
same for all heights and is equal to 7.5 m.