Planning
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4.4.4.5
Sampling holes for planning without “ASD PipeFlow” calculation
To ensure that all the sampling holes take in the same amount of air, the diameter of the sampling hole on the sampling tubes
fitted must increase as the distance from the detector housing increases.
Fig. 10 Size of sampling holes
The tables below show the respective hole diameters for the numbers in
as a function of the number of sampling holes
per sampling branch (this applies also to high-rack storage facilities).
If required, the sampling holes can be created using the special “sampling hole clips”. The sampling hole clips are available in
various sizes (i.e. with hole diameters as indicated in the table above: 2.0 / 2.5 / 3.0 / 3.5 / 4.0 / 4.5 / 5 / 5.5 / 6 / 6.5 / 7 mm).
See also Sec. 5.5.9.
I-shaped sampling pipes
Number of
sampling holes
Hole diameter in mm for the sampling hole number counted from the detector housing:
1
2
3
4
5
6
7
8
9
10
11
12
1
5.0
2
4.0
5.0
3
4.0
4.0
5.0
4
3.5
3.5
4.0
5.0
5
3.5
3.5
3.5
4.0
5.0
6
2.5
2.5
2.5
2.5
3.0
5.0
7
2.5
2.5
2.5
2.5
2.5
2.5
5.0
8
2.5
2.5
2.5
2.5
2.5
2.5
2.5
5.0
9
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
5.0
10
2.0
2.0
2.0
2.5
2.5
2.5
2.5
2.5
3.0
7.0
11
2.0
2.0
2.0
2.0
2.5
2.5
2.5
2.5
2.5
4.0
7.0
12
2.0
2.0
2.0
2.0
2.0
2.0
2.5
2.5
2.5
2.5
4.0
7.0
U/T-shaped sampling pipes
Number of
sampling holes
per sampling
Hole diameter in mm for the sampling hole number counted from the detector housing:
1
2
3
4
5
6
1
5.0
2
4.0
5.0
3
4.0
4.0
5.0
4
4.0
4.0
4.0
5.0
5
4.0
4.0
4.5
5.0
6.5
6
3.0
3.0
3.5
3.5
4.0
6.5
H/E-shaped sampling pipes
Number of
sampling holes
per sampling
Hole diameter in mm for the sampling hole number counted from the detector housing:
1
2
3
4 (E-shaped only)
1
5.0
2
4.0
5.0
3
4.0
4.0
5.5
4 (E-shaped only)
3.0
3.0
3.5
5.5
1 to 12 = sampling hole number
I-
shaped
1
2
3
4
5
6
7
8
9
10
11
12
E-
shaped
1
1
1
2
2
2
3
3
3
4
4
4
H-
shaped
3
3
2
2
1
1
1
1
2
2
3
3
U/T-
shaped
6
6
5
5
4
4
3
3
2
2
1
1
ASD532 Operating Manual
Summary of Contents for ASD 532
Page 1: ...ASD 532 Aspirating Smoke Detector Operating Manual ...
Page 2: ...2 88 ASD532 Operating Manual ...
Page 6: ...6 121 ASD532 Operating Manual ...
Page 7: ...Document history 7 121 Document history First edition Date 15 10 2015 ASD532 Operating Manual ...
