Table of Contents
Advertisement
Aspiration smoke detector LSN improved
Q
R
S
T
U
V
W
X
Y
Z
a = Acceleration openings = 7.0 mm
Refer to
–
4.11
Planning for forced airflow
Monitoring the air-conditioning ducts
Air-conditioning units are broken down into low and high-speed units (see table below). The
details provided in this chapter apply only to low-speed units. There are no adequate empirical
values available for high-speed units. Hence, smoke trials must be executed for air-
conditioning ducts with flow speeds above 10 m/s, in order to determine optimal response
behavior.
Air-
conditioning
ducts
The speed distribution in an air-conditioning duct appears as follows:
Speed distribution in an air-conditioning duct
Bosch Sicherheitssysteme GmbH
-
-
a
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
2. Option: reducing the number of air sampling openings, page 58
Flow speed
Duct cross-section
Difference pressures
along the flow
direction
v
4
v
3
v
2
v
1
6.0
3.6
2.5
2.5
a
6.0
3.0
2.5
-
a
6.0
3.0
-
-
a
6.0
-
-
-
a
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Low-speed units
Maximum 6 to 10 m/s
Large
Low
1
v
v
v
v
1 >
2 >
3 >
4
Operation guide
Planning | en
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
3.0
2.5
2.5
6.0
3.0
2.5
a
6.0
3.0
-
a
6.0
-
-
a
-
-
-
-
-
-
High-speed units
> 10 m/s
Small
High
1
Air-conditioning duct
V
- V
Flow speed
1
4
2020.04 | 6.1 | F.01U.029.275
67
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
3.0
2.5
6.0
3.0
a
6.0
-
a
- Quick Links:
- Technical Specifications
Hide quick links:
Advertisement
Table of Contents
