3
Building Technologies
009726_g_--_--
Fire Safety
2018-07-06
en
Installation
Application
The air sampling smoke detection kit (Fig. 1, 2) detects
smoke in incoming air, outgoing air and circulation air
ducts of air conditioning and ventilation systems.
The air sampling smoke detection kit is only suitable for
indoor use.
Functional principle
The air sampling smoke detection kit is a passive
monitoring system without its own fan. It makes use of the
existing pressure difference in the ventilation system in
order to supply a continuous flow of air through a bypass
from the ventilation duct to the air sampling smoke
detection kit. The air sampling smoke detection kit only
works if the ventilation system is in operation and the air is
circulating.
The monitored air must be clean, i.e. free from dust and
aerosols. When a smoke concentration set on the smoke
detector is reached, the corresponding danger level is
signaled to the central control unit which initiates the
corresponding alarm.
Project planning
Calculate the distance for the installation site of the air
sampling smoke detection kit on the basis of the duct
dimensions, which is calculated from value Dh (refer to
formula in Fig. 4).
To ensure safe detection, the flow rate must be at
minimum 1 m/s. The distance to the possible smoke
source must be 5 x Dh.
Legend Fig. 3
1 Air inlet
2 Air outlet
3 Air flow direction (velocity 1 … 20 m/s)
Installation method
The installation method depends on the duct type and its
thickness. Combinations of materials listed in the
"Assembly sets" table are available.
Legend
Fig. 6
Circular duct <600 mm
Fig. 7
Rectangular duct <600 mm
Fig. 8
Circular duct >600 mm
Fig. 9
Rectangular duct >600 mm
Refer to table below for positions in figures 6 to 9.
Assembly Sets
Duct size
Circular/insulated duct
Rectangular duct
600 mm
FDBZ292 [1]
Air sampling smoke detection kit
FDBZ292 [1]
Air sampling smoke detection kit
FDBZ292-AD [3]
Sealing kit
FDBZ292-AF [2]
Mounting bracket
FDBZ292-AA [4]
Air flow tube 600 mm
FDBZ292-AA [4]
Air flow tube 600 mm
è
see Fig. 6
è
see Fig. 7
>600 – 1400 mm
FDBZ292 [1]
Air sampling smoke detection kit
FDBZ292 [1]
Air sampling smoke detection kit
2x FDBZ292-AD [3]
Sealing kit
1x FDBZ292-AD [3]
Sealing kit
FDBZ292-AF [2]
Mounting bracket
FDBZ292-AB [4]
Air flow tube 1500 mm
FDBZ292-AB [4]
Air flow tube 1500 mm
è
see Fig. 8
è
see Fig. 9
>1400 – 2800 mm
FDBZ292 [1]
Air sampling smoke detection kit
FDBZ292 [1]
Air sampling smoke detection kit
2x FDBZ292-AD [3]
Sealing kit
1x FDBZ292-AD [3]
Sealing kit
FDBZ292-AF [2]
Mounting bracket
FDBZ292-AC [4]
Air flow tube 2800 mm
FDBZ292-AC [4]
Air flow tube 2800 mm
è
see Fig. 8
è
see Fig. 9
