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FDS-3G…OF
Technical Parameters
Durability test
50 cycles/manually operated activation mechanism – with no change of the required properties
10000 + 100 + 100 cycles/actuator operated activation mechanism – with no change of the required properties
Fire testing pressure
Underpressure up to 300 Pa
Safety position
Closed. (In fire scenario the damper closes via spring in actuator or spring in manual mechanism)
Airflow direction
Both directions
Allowed air velocity
Damper can still operate at max. 12 m/s. Air without any mechanical or chemical contamination
Side with fire protection
Depending on installation classification: From both sides (i <-> o)
Repeated opening
Suitable for daily check procedure. It is not possible to operate the device after reaching Activation temperature.
Activation Temperature
Manually operated: 74 °C as standard by means of a spring after the melting of the thermofuse and/or after smoke
sensor detection.
Actuator operated: 72 °C as standard by means of the spring after current interruption in the electro-thermal fuse and/
or after smoke sensor detection.
Operational temperature
Minimum: 0 °C
Maximum: 60 °C for 74 °C and 72 °C thermofuse
Environment suitability
Protected against weather disruptions, with temperature above 0 °C, up to 95% Rha, (3K5 according to EN 60721-3-3)
Open/Closed indication
Manually operated microswitches - Activation types H2-OF up to H6-2-OF
Actuator operated built-in microswitches - Activation types B230T-OF/G230T-OF up to BSD24T-OF/GSD24T-OF
Closing/Opening time
Manually operated < 10 s, actuator operated < 20 s
Inspection possibility
By opening of the inspection lid. For smaller sizes than 200 mm after removing of the activation mechanism, or a
inspection opening must be added to the connecting duct. Smoke senzor can be tested with test button or through
damper grille with smoke spray tester.
Maintenance
Not required. Dry cleaning if demanded by law in the country in which the dampers are installed.
Revisions
Determined by law in the country in which the fire dampers are installed but at least every 12 months.
Allowed pressure
1200 Pa
Summary of Contents for FDS-3G H0-OF Series
Page 1: ...FDS 3G OF Overflow Fire Damper FDS 3G ...
Page 14: ...14 49 FDS 3G OF Free area Dimensions Dimensions FDS 3G OF 200 x 200 up to 1200 x 800 ...
Page 15: ...15 49 FDS 3G OF Weights Overhangs ...
Page 18: ...18 49 FDS 3G OF Installation Methods ...
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Page 49: ...Systemair DESIGN 2020 10 23 HandBook_FDS_3G_OF_en GB 8519DCD0 0720 11EB DCA1 21ABDD8D93BC ...