Testing The Response Time - Siemens FDA241 Technical Manual

Commissioning
7

Testing the response time

7.6
88
Building Technologies
Fire Safety
Large deviations in the airflow outside the set limit parameters
If the airflow is outside the set limit parameters (e.g., ±20 %), the fault relay is
activated. In the event of other deviations, the LED on the fault indicator lights up
and the device reports a fault on all connected interfaces.
The behavior described is identical in the case of standalone mode and operation
on an FDnet/C-NET detector line.
If the aspirating smoke detector is operated on an FDnet/C-NET detector line, a
message is also transmitted to the fire control panel.
The value for the deviation can be configured with the 'FXS2051 ASD
Configuration Tool' software.
See also
 'Fault' relay output for error messages [➙ 69]
 Table of faults [➙ 102]
Testing the response time
The response time is the time it takes for the smoke indicator to respond after
smoke enters an aspirating hole [➙ 24].
The 'FXS2051 ASD Configuration Tool' software can be used to set the alarm
delay and the tolerance for airflow deviations.
 A smoke stick/aerosol spray is available.
 The fire detection system has been switched to maintenance mode.
1. Move the smoke/aerosol toward the aspirating hole at the end of the pipe
system.
2. Measure the response time (the time it takes for the smoke detector on the
aspirating smoke detector to change).
3. Compare the measured response time with the amount of time you know it
should take for the detector to respond.
– On initial installation, compare the response time with the response time
calculated by the 'FXS2055 ASD Asyst Tool' software. For details, see
document A6V10340094.
– In the case of subsequent measurements, compare the response time with
the response time that was measured after successful normalization as
part of first commissioning.
 If the measured response time deviates by more than 15 %, the pipe system
must be checked.
To check the pipe system, proceed as follows:

– All aspirating holes must be clear.
– The pipe system must not be blocked.
– All pipe connections must be tight.
– The pipe system must not have any cracks or fractures in it.
– You will find more information in chapter 'Checking the pipe system [➙ 93]'.
A6V10334410_h_en_--
2015-09-29