Fig. 45: Damper blade position indicator
①
Damper blade is closed
②
Damper blade is open
Functional test with automatic control unit
The function of fire dampers with a spring return
actuator can also be tested with an automatic control
unit. The control unit should have the following func-
tions:
Opening and closing fire dampers in regular inter-
vals (intervals to be set by the owner or operator)
Monitoring of the actuator running times
Issuing an alarm when the running times are
exceeded and when fire dampers close
Recording the test results
TROXNETCOM systems such as TNC-EASYCON-
TROL or AS-interface meet all these requirements. For
details on these products please refer to the TROX Fire
and Smoke Protection catalogue.
Opening the damper blade using the crank handle
Fig. 46: Functional test
DANGER!
Danger due to malfunction of the fire damper.
If the damper blade has been opened by means of
the crank handle (without power supply), it will no
longer be triggered by a temperature increase, i.e. in
the event of a fire. In other words, the damper blade
will not close.
To re-establish its function, connect the power
supply.
Requirement
The damper blade is CLOSED
1. Insert the crank handle ① into the opening for the
spring-winding mechanism. (The crank handle is
clip-fixed to the connecting cable.)
2. Turn the crank handle into the direction of the
arrow ② to just short of the travel stop.
3. Then quickly rotate the crank handle by
approx. 90° towards the 'lock' position .
ð
The damper blade remains in the OPEN posi-
tion.
4. Remove the crank handle.
Functional test
Fire damper with spring return actuator
Fire damper Type FKRS-EU54
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