Planning
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4.5.4
System limits for equipment monitoring without ASD PipeFlow calculation
If it is unavoidable that a project is planned without ASD PipeFlow calculation (e.g. system modernisations), the following
threshold values must be observed for each pipe input / smoke sensor:
Farthest sampling point
60 m
Minimum length of the sampling pipe
1 m
Maximum length of the sampling pipe (total)
80 m
Tube
∅
trunk line (inner/outer)
20 / 25 mm
Minimum tube
∅
of flexible sampling branch (inner/outer)
16 / 21 mm
Maximum length per flexible sampling branch
3 m
Number of sampling holes per sampling fixture
2 – 4
Minimum number of sampling holes
4
Maximum number of sampling holes (total)
16
Notice
The values in the table above must be strictly observed. Other values may be used only after consulting with the
manufacturer.
4.5.4.1
Alarm thresholds for equipment monitoring using sampling fixtures without ASD PipeFlow calculation
When planning without ASD PipeFlow calculation as described in Sec. 4.5.4, the following alarm thresholds (saved on switch
positions
X01
,
X02
or
X03
) are to be set by means of the “ASD Config” configuration software based on the total number of
sampling holes in
all sampling fixtures (AV)
on the ASD:
When using without duster filter unit FBL/DFU:
Response grade
Alarm threshold (%/m) for total number of sampling holes (without FBL/DFU)
4
(1 AV)
5 – 8
(2 AV)
9 – 12
(3 AV)
13 – 16
(4 AV)
acc. to EN 54-20, class A
0.1
0.05
0.033
0.024
acc. to EN 54-20, class B
0.29
0.14
0.095
0.07
acc. to EN 54-20, class C
1.67
0.83
0.55
0.4
In equipment monitoring it preferable to use Classes A and B compliant with EN 54-20.
When using with duster filter unit FBL/DFU:
Response grade
Alarm threshold (%/m) for total number of sampling holes (with FBL/DFU)
4
(1 AV)
5 – 8
(2 AV)
9 – 12
(3 AV)
13 – 16
(4 AV)
acc. to EN 54-20, class A
0.07
0.035
0.023
---
acc. to EN 54-20, class B
0.2
0.1
0.065
0.05
acc. to EN 54-20, class C
1.17
0.58
0.38
0.28
In equipment monitoring it preferable to use Classes A and B compliant with EN 54-20.
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 ...
