Siemens FD20 Guideline

Combustible liquid fire (TF6)
Table 6 can be used to determine the required fire size (surface area of the
container) and the amount of ethyl alcohol. The next section describes what is
meant by "Minimum room height".
Maximum distance
detector to fire
[m]
Container size
(surface area)
[m
2
]
Quantity of
ethyl alcohol
[l] (5mm high)
Minimum
room height
[m]
Sensitivity
normal
high
5 10 0.025 0.125 1.5
15 30 0.1 0.5 3.0
23 46 0.25 1.25 5.0
32 65 0.5 2.5 7.0
46 92 1.0 5 10
65 - 2.0 10 14
92 - 4.0 20 20
Tab. 6 Amount of ethyl alcohol for flame detectors
Example: Distance between detector and test fire = 20 m
Mounted detectors = FDF241/221 with the parameter set 1, 2 or 3
(normal sensitivity)
Determination of the container size (surface) and amount of ethyl
alcohol from Table 6 -> 0.25 m
2
and 1.25 l
Result: A container with a surface area of 0.25m
2
and filled with 1.25 liters of
ethyl alcohol is required.
5.4 Test procedure
z Determine the size of the container and the amount of ethyl alcohol.
z Place the protective container on a flame-retardant underlying board; then place
the steel sheet container into the protective container (this prevents leakage of
the spirit and also damage to the floor).
z When performing acceptance fire tests with flame detectors, ensure there is a
direct "line of sight" from the detector to the test fire.
z Before pouring in the liquid check the safety precautions. It is especially
important to ensure that portable powder fire extinguishers are ready for use.
z Only pour the ethyl alcohol into the cold container shortly before ignition to avoid
risk of deflagration!
z Ignite small containers with an extra-long match; if the container is larger than
0.5m
2
, use burning bundles of cotton thread on a rod.
z Always leave the combustible liquid to burn out even after an alarm has been
triggered. Smothering the flames leads to the formation of combustible vapors.
z Ventilate the room.
19
Building Technologies 009977_b_en.doc
Fire Safety & Security Products 10.2007

Siemens FD20 Specifications

General

Brand	Siemens
Model	FD20
Category	Security Sensors
Language	English