5.16 Fire damper (Fdp11y)
The ventilation unit can be equipped with fire dampers that close automatically
when a fire alarm is triggered by duct temperatures. During normal operation with
the power switched on, the dampers are always open. In the event of a power
failure, the dampers close automatically. After closing the fire dampers due to an
alarm situation, normal operation can only be resumed if the fault is acknowledged
and reset manually.
The fire dampers are equipped with their own release thermostat, so the fire
dampers close automatically during the fire situation and the feedback signal from
the closed dampers generates an A alarm for the fire situation with emergency
shutdown.
Some fire situations are not covered by the built-in release thermostat. The fire
damper will be closed by the control program, if
●
The duct air temperature supervision has exceeded the fire alarm limit.
●
A smoke alarm is raised and smoke alarm mode is set to "Both fans off".
NOTICE
●
Local fire safety regulations may require that the fire dampers are being
tested periodically to secure correct operation.
●
Fire damper testing is part of the periodical maintenance.
●
During the fire damper operation test the ventilation is first shut down, then the
dampers close and then open again, before the ventilation can be resumed.
●
Fire dampers have inbuilt auxiliary switches on both open and closed positions
which signalize that the movement was successful.
●
If one of these signals is missing, an A-alarm is generated and the unit is
stopped.
Performing a fire damper
test
1. Set output to "1".
a
At the latest after 130% of the opening time, the damper must be opened
and the FB signal must be "1" for damper opened.
2. Set output to "0".
a
The damper closes. Between 40...60% of the closing time, the FB signal
must be "0".
3. Wait for the damper to close completely.
a
Damper continues closing. Between 90...130% of the closing time, FB
signal must change from "0" to "1" for damper closed.
4. Set output to "1".
a
Damper opens. Between 40...60% of the opening time, FB signal must be
"0".
5. Wait for the damper to open completely.
a
Damper continues opening. Between 90% and 130% of the opening time,
the FB signal must change from "0" to "1" for damper opened.
After switching on the controller, it can be assumed that the fire damper has closed
due to a power failure. The output is set to "0", 130% of the closing time is waited
and the test procedure is carried out from step 4.
After a test failure or after unexpected closing of the fire damper, acknowledge and
reset of the alarm is required. After reset, the output is set to “0”, 130 % of the
closing time is waited, and the test procedure is executed from step 4 onwards.
Application functionalities
Fire damper (Fdp11y)
5
A6V10733786_en_c
127 | 170
