Design
TITANUS
RACK·SENS
®
1U
4 –
24
Data: 03/09
TRS_A_04-en-e
4.8 Air flow monitoring
EN54-20 requires detection of a 20% airflow volume deviation. In order to
accomplish this, the airflow threshold must be set to
≤
20 %.At this point
it is recommended to perform an air-pressure dependent airflow initialisa-
tion adjustment.
For installations not complying with EN-54-20 the airflow threshold can
be set as desired.
The airflow monitoring of the connected pipe work must comply with na-
tional directives.
Adjusting
airflow
sensitivity
The airflow monitoring sensitivity must be chosen according to the appli-
cation. Pipe rupture or blockage have to be detected safely. If a different
airflow monitoring sensitivity than 20% is required, the diagnostics tool
needs to be used for setup.
Dynamic air flow
sensor
technology
The integrated air flow monitoring enables the system to detect both pipe
breakages or sudden blockage (e.g. in the event of sabotage in the pipe
system). As the dynamic air flow sensors are only active if the “Dynamic
air flow ON” settings are programmed in the software when the device is
put into operation, the following aspects must be taken into account.
•
Dynamic airflow monitoring is usually not suitable for monitoring of
cabinets with forced airflow, as the systems will respond in this op-
eration mode to small airflow variations.
The following limits must always be complied with for the TITANUS
RACK·SENS
®
1U
system:
•
The minimum pipe length between 2 aspiration holes is
0.1 m
.
•
The maximum pipe length between 2 aspiration holes is
4 m
.
•
The maximum monitoring surface area per aspiration holes
corresponds to the monitoring area of a point-detector
according to the regulations in the particular national standards.
•
Maximum 10 aspiration holes are possible
TP4F
5
PT
.
Because of country-specific regulations, there may be restrictions
compared to the design limits in this manual!
TP
5
PT
Designs / design forms not given in the manual are to be requested.
INSTRUCTION
