Mounting Locations - System Sensor BEAM200A Installation And Maintenance Instructions Manual

Single-ended reflected type projected beam smoke detector

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mounted with the transmitter/receiver on one wall and the

reflector on the opposite wall, or both suspended from the

ceiling, or any wall/ceiling combination. In the case of the

ceiling mount, the distance from the end walls should not

exceed one-quarter of the selected spacing (7.5 ft. [2.3m]

maximum if the spacing is 30 ft. [9.1m]). See Figure 2.

Figure 1. Spacing for smooth ceiling (side view):

Figure 2. Spacing for smooth ceiling (top view):

Tx/Rx

1/4 S

Max.

Tx/Rx

328 ft. (100m) Maximum

In the case of peaked or sloped ceilings, codes may specify

spacing of detectors by using horizontal spacing from the

peak of the roof or ceiling. Figures 3 and 4 show the spacing

for both the shed type and peaked type sloped ceilings.

On smooth ceilings, beam smoke detectors should gener-

ally be mounted between 12 and 18 inches (0.3 to 0.46m)

from the ceiling. In many cases, however, the location and

sensitivity of the detectors shall be the result of an engi-

neering evaluation that includes the following: structural

features, size and shape of the room and bays, occupancy

D400-74-00

1/2 S Maximum

Reflector

16 ft. (5m) Mini mum

and uses of the area, ceiling height, ceiling shape, surface

and obstructions, ventilation, ambient environment, burn-

ing characteristics of the combustible materials present,

and the configuration of the contents in the area to be

protected.

Figure 3. Sloped ceiling (shed type):

3 f t . ( 0

. 9 m )

M a x .

Figure 4. Sloped ceiling (peaked type):

C0254-00

Mount Detector

Anywhere in This Area

Reflector

Tx/Rx

1 / 2 S

3 f t . ( 0

M a x .

C0255-00