Fah-425-T-R - Bosch AVENAR detector 4000 User Manual

20 en | Programming
4.4 FAH‑425‑T‑R
Notice!
i
EN 54 Part 5
The default setting of FAH-425-T-R in FSP-5000-RPS is A2R.
Sensitivity
A2R
A2S
A1R
A1
BR
BS
Categories as per EN 54 Part 5
With the detector types FAH-425-T-R, it is possible to set one of the categories listed above in
line with planning.
In the categories A1, A2S and BS, the FAH-425-T-R is operated purely as a thermal maximum
detector. In this case, the detector does not activate at below 54 °C in category A2S, and not
below 69 °C in category BS.
The categories A2S and BS are therefore particularly suitable for applications where higher
temperature rates-of-rise occur over a longer period, e.g. in kitchens or boiler rooms.
The categories A1R, A2R and BR indicate that the thermal differential unit is active in addition
to the thermal maximum unit.
These categories are especially well-suited for use in unheated buildings where the ambient
temperature can vary greatly but high temperature rates-of-rise do not last long.
The thermal differential unit enables categories A1R/A2R detectors to respond at T<54 °C and
category BR detectors at T<69 °C.
The selection of the category also depends on the installation height of the detector.
To maintain the greatest possible security against false alarms, categories A1 and A1R should
not be selected for room heights below 6 m, although these categories are in theory
permitted. Furthermore, the expected application temperature must be taken into
consideration.
Temperature
rate-of-rise [K
min
10
20
30
2023-06 | 07 | F.01U.283.550
Description
Typical application temperature: 25 °C, T
Typical application temperature: 25 °C, only T
Typical application temperature: 25 °C, T
Typical application temperature: 25 °C, only T
Typical application temperature: 40 °C, T
Typical application temperature: 40 °C, only T
Response time for detectors in the
category A1R
-1
]
Lower limiting
value [min/sec]
1 min
30 s
20 s
Upper limiting
value [min/sec]
4 min 20 s
2 min 20 s
1 min 40 s
User manual
AVENAR detector 4000
+ T , height up to 6 m
max diff
, height up to 6 m
max
+ T , height 6 m to 7.5 m
max diff
, height 6 m to 7.5 m
max
+ T , height up to 6 m
max diff
, height up to 6 m
max
Response time for detectors in the
category A2R/BR
Lower limiting Upper limiting
value [min/sec] value [min/sec]
2 min 5 min 30 s
1 min 3 min 13 s
40 s 2 min 25 s
Bosch Sicherheitssysteme GmbH