Bosch D296 Installation Instructions Manual page 13

9.0 Installing Multiple D296 and D297 Detectors
For smooth, flat ceilings, mount the detectors so there is spacing of no more than 60 ft (18.3 m) between beam paths
(with no more than half of this spacing between the beam path and side wall, the wall parallel to the beam path).
Other spacings depend on ceiling height, air flow characteristics, and response requirements. The minimum spacing
between adjacent detectors is 1/10th the distance between the transmitter and receiver. For example, if the beam
length is 300 ft (91 m), place the detectors a minimum of 30 ft (9.1 m) apart. Refer to Figure 18 for layout placement.
Figure 18: Transmitter and Receiver Placement
1 - Receiver
2 - FACP
When two or more adjacent detectors are installed in the same area, alternate the transmitter and
receiver locations. If the transmitter and receiver are not alternated, ensure the spacing between the
detectors is 1/5
Bosch Security Systems, Inc. | 09/06 | 31344F
D296/D297 | Installation Instructions | 9.0
3 - Transmitter
4 - EOL resistor
th
the distance from the transmitter to the receiver.
Installing Multiple D296 and D297 Detectors
5 - 60 ft (16.3 m) maximum
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