Fah-T 420/Fah-T 420-Kkw - Bosch FAP-DO420 Operation Manual

Automatic Fire Detectors LSN improved
version
Installation locations
Theater/concert hall
Warehouse with vehicle traffic
Office (smoker)/waiting room/restaurant/meeting room
Conference hall/waiting room/fairground
Office (after hours)
School/kindergarten
Production location
EDP room
High storage warehouse without vehicle traffic with combustion
engine
Office (day mode)
4.4

FAH-T 420/FAH-T 420-KKW

Selectable installation locations in the programming software (WinPara and
FSP-5000-RPS)
§ A2R
A2S
A1R
A1
BR
BS
§ = Basic setting in the WinPara and FSP-5000-RPS programming software
Sensitivity classes as per EN 54 Part 5
With the detector types FAH-T 420 and FAH-T 420-KKW, 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-T 420 or FAH-T 420-KKW 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.
Bosch Sicherheitssysteme GmbH
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
Operation Guide
Programming | en
Selectable sensitivity
+ 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
F.01U.003.448 | 8.0 | 2011.10
13
Medium
Low
Low
Low
High
Medium
Low
High
High
Medium