Bosch FAS‑420‑TP Series - FAS-420 Functional Test; Preparations for the Functional Test

100 en | Commissioning Aspiration smoke detector LSN improved
2020.04 | 6.1 | F.01U.029.275 Operation guide Bosch Sicherheitssysteme GmbH
4. Enter the result in the test log.
Notice!
A pipe breakage or pipe obstruction is indicated by a flash code via an LED on the detector
module:
Breakage: 3 x flashes
Obstruction: 2 x flashes
The corresponding flash code is repeated every two seconds.
Troubleshooting
If the airflow malfunctions are not correctly detected by the unit, proceed as follows:
Check whether…
4 All inlet holes are free
1. The pipe system has breaks or fractures
2. All pipe connections are tight
3. The fan can blow out freely
4. The correct aspiration reducing film sheets were used
If no faults are detected, the functionality of the FAS-420 and/or the airflow sensor is checked
using the test pipe or diagnostic software.
7.6 FAS‑420 Functional test
Check functionality using the test pipe, a digital pressure gauge and the diagnostic software.
The aspirating smoke detector must be operating for at least 30min.
7.6.1 Preparations for the functional test
Select the following parameter settings using the FSP‑5000‑RPS programming software (the
settings in the bold font indicate deviations from the default setting):
Activation threshold for airflow malfunction Alarm delay
Low (+/- 10% volume flow change) 0 seconds
Average (+/- 20% volume flow change) 10 seconds
High (+/- 30% volume flow change) 30 seconds
Very high (+/- 50% volume flow change) 60 seconds
Airflow fault delay LOGIC·SENS filter
30 seconds Off
2 minutes On
15 minutes
60 minutes
Connecting the digital pressure gauge:
– Connect the test pipe
– Connect the pressure measuring hose to the adapter connection B.
– Connect the 4-pin plug of the adapter to the digital pressure gauge and switch it on.