Figure 3.3: Multiple-level Mounting
1
Multiple-level mounting locations
Location and Spacing
The D296/D297 detectors allow a range of 30 ft to 350 ft (9 m to 106 m) and spacing up to
60 ft (18.3 m). Space the detectors no more than 60 ft (18.3 m) between projected beams
and no more than half the spacing between a projected beam and a sidewall . You can
determine other spacing based on ceiling height, airflow characteristics, and response
requirements. In some cases, mount the transmitter on one end wall and mount the receiver
on the opposite wall. You can also mount the transmitter and receiver up to one-quarter of the
spacing distance from the end walls.
See the following figure:
Figure 3.4: Location and Spacing
1 Transmitters (2) S Selected detector spacing
2 Receivers (2)
Ceilings
Flat Ceilings
Flat‑ceiling Projected beam applications are those that have a flat, smooth ceiling with a
height of 12 ft (3.6 m) or lower and beam or solid joist depths of 1 ft (0.3 m) or less. Open
trusses less than 10% material and 90% open air do not affect the flow of smoke. Smooth flat
ceiling guidelines apply where the trusses are used.
3.4
3.5
3.5.1
8 en | Document Introduction Projected-beam Smoke Detectors
2013.02 | 02 | F.01U.500.951 Application Guide Bosch Security System, Inc.
To Next Page
Loading...
