Sauter flexotron®800
ventilation
Functional description
P100012082
51
such a fashion that the damper is open when the supply air fan is running. When using
pressure controlled fans the digital activation signal is activated as soon as the fan has
start conditions. This signal can be used to open the close-off damper.
5.6.2
Fire dampers
Fire dampers are normally configured to open on fire alarm. However, via the display
you can configure them to be normally open instead.
You can use CASE flexotron® to configure the air handling unit’s running mode on fire
alarm. The following choices are possible: Stopped, continuous run, run via normal
start/stop conditions, only supply air fan in operation, only extract air fan in operation.
There is a digital input for detection of open and closed position of the fire dampers.
Fire damper exercising
Fire damper exercising can be configured. The exercise interval is settable. To be able
to use this function, all the dampers must have end-position switches.
The digital input: "Fire damper end-switch monitoring" should be wired to all the fire
damper end position switches.
When the test cycle is initiated, the output "Fire dampers" will be activated and the
dampers will begin to move. Within the set time (90 sec) the signal on "Fire damper
end-switch monitoring" must change to indicate that the dampers have left their normal
positions. If not an alarm will be triggered.
Then, within the set time,
’’Fire damper, end-switch monitoring’’ must change again to
indicate that all the dampers have reached the other end position. If not an alarm will be
triggered.
When all dampers have reached the end position the output "Fire dampers" will be
reset to drive the dampers back to normal position. Again, within the set time (90 sec)
the signal on the input "Fire damper end-switch monitoring"must change to indicate that
the dampers have left the end positions. If not an alarm will be triggered.
Then, within the set time, "Fire damper end-switch monitoring" must change again to
indicate that all the dampers are back to their normal positions. If not an alarm will be
triggered.
The controller can be configured to stop the air handling unit during the damper testing.
All dampers must be wired to the same output in order to get correct results.
The fire alarm input can be configured as normally closed or normally open.
In- and outputs
DO
Outdoor air damper
DO
Exhaust air damper
DO
Fire damper
DI
Fire alarm
DI
Fire damper end switch monitoring
0°
90°
Damper...
Damper 3
Damper 2
Damper 1
+C
DI
