Fah-425-T-R - Bosch AVENAR 4000 FAP-425-O User Manual

AVENAR detector 4000
Installation locations
Production location
EDP room
High storage warehouse without vehicle traffic with combustion
engine
Office (day mode)
4.4 FAH‑425‑T‑R
Selectable sensitivity in the programming software (FSP-5000-RPS)
A2R *
A2S
A1R
A1
BR
BS
* = Default setting in FSP-5000-RPS programming software
Sensitivity classes as per EN 54 Part 5
With the detector types FAH-425-T-R, it is possible to set one of the sensitivity classes listed
above in line with planning.
In the sensitivity classes 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 class A2S,
and not below 69 °C in class BS.
The sensitivity classes 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 sensitivity classes A1R, A2R and BR indicate that the thermal differential unit is active in
addition to the thermal maximum unit.
These sensitivity classes 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 class A1R/A2R detectors to respond at T<54 °C and class
BR detectors at T<69 °C.
The selection of the sensitivity class also depends on the installation height of the detector.
To maintain the greatest possible security against false alarms, classes A1 and A1R should not
be selected for room heights below 6 m, although these classes are in theory permitted.
Furthermore, the expected application temperature must be taken into consideration.
Temperature
rate-of-rise [K
min
10
20
30
Bosch Sicherheitssysteme GmbH
Typical application temperature: 25 °C, Tmax + Tdiff, height up to 6 m
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
sensitivity class A1R
-1
]
Lower limiting
value [min/sec]
1 min
30 s
20 s
+ T
max
+ T
max
Upper limiting
value [min/sec]
4 min 20 s
2 min 20 s
1 min 40 s
User manual
Programming | en
Selectable sensitivity
Low
High
High
Medium
, height up to 6 m
max
, height 6 m to 7.5 m
diff
, height 6 m to 7.5 m
max
, height up to 6 m
diff
, height up to 6 m
max
Response time for detectors in the
sensitivity classes 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
2021-11 | 4 | F.01U.283.550
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