FDS-3G-OF

Overflow fire dampers represent passive fire protection, designed with the help of compartmentalization to prevent the spread of toxic gases, smoke and fire. Standard fire dampers are designed and certified in accordance with EN 15650 and tested for EIS criteria according to EN 1366–2. Fire damper together with its installation form an inseparable part of fire resistivity rating. FDS-3G...OF fire dampers are to be used as Air Transfer Grilles - installations without connected ductwork. The installations are listed and described in their User Manual. By default, all Overflow fire dampers are supplied with an manual mechanism or actuator mechanism, optionally with smoke detector. FDR-3G...OF is equipped on both ends with Grilles that together with the duct extensions cover blade overhangs.

By default, all manually operated fire dampers are supplied with hand crank, optionally with micro switches. In case of fire, the fire damper is closes automatically after the melting of the thermal fuse. After the closing of the damper blade, it is mechanically locked in the closed position and can only be opened manually. The actuating mechanism is activated when the temperature of the air in the duct reaches 74°C and the damper closes within 10 seconds after the melting of the fuse.

By default, all actuator operated fire dampers are supplied with an actuator with micro switches. A fire damper equipped with a spring return actuator can be closed with command from the building management system, or after the breaching of the thermoelectric fuse. Actuator operated fire dampers are standardly equipped with a thermoelectric fuse, that activates the closing of the damper after the reaching or exceeding of the ambient temperature of 72°C. The actuator power circuit is interrupted and its spring closes the damper blade within 20 seconds.

The activation mechanisms are removable and are interchangeable, for example an actuator operated mechanism instead of a manually operated mechanism.

• Activation types with fitted smoke detector

• Construction with included Grilles

• Casing tightness class C as standard

• Exceptionally low pressure drop

• Changeable mechanism

• Two inspection openings for all sizes

• Great variety of installations rated up to EI120S

• H0-OF

Overflow fire damper with an activation mechanism with a cover, manual crank and with a spring return release mechanism activated by a fusible thermal link set to 74°C (on demand 100°C).

• H2-OF

Overflow fire damper with an activation mechanism H0-OF + open and closed indication with AC 230 V or AC/DC 24 V contact switches.

• H5-2-OF

Overflow fire damper with an activation mechanism H0-OF + a AC/DC 24 V electromagnetic release mechanism in the impulse connection (release takes place when the electromagnet is activated) + open and closed indication with AC 230 V or AC/DC 24 V contact switches.

• H6-2-OF

Overflow fire damper with an activation mechanism H0-OF + an AC 230 V electromagnetic release mechanism in the impulse connection (release takes place when the electromagnet is activated) + open and closed indication with AC 230 V or AC/DC 24 V contact switches.

• B230T-OF or G230T-OF

Overflow fire damper with an activation mechanism with a Belimo or Gruner spring return actuator (AC 230 V) with electro-thermal fuse 72°C and auxiliary switches.

• B24T-OF or G24T-OF

Overflow fire damper with an activation mechanism with a Belimo or Gruner spring return actuator (AC/DC 24 V) with electro-thermal fuse 72°C and auxiliary switches.

• BSD230T-OF or GSD230T-OF

Overflow fire damper with Smoke Detector fitted activation mechanism (AC 230 V) with a Belimo or Gruner spring return actuator with an electro-thermal fuse 72°C and auxiliary switches, with a Belimo supply and communication unit or Gruner power supply unit (Actuator powered through transformer and Smoke Detector AC/DC 24 V).

• BSD24T-OF or GSD24T-OF

Overflow fire damper with Smoke Detector fitted activation mechanism (AC/DC 24 V) with a Belimo or Gruner spring return actuator with an electro-thermal fuse 72°C and auxiliary switches, with a Belimo supply and communication unit or Gruner power supply unit (Actuator powered through Smoke Detector AC/DC 24 V).

Fire dampers have casings made from galvanized sheet metal. Blades from non-asbestos insulants have a rubber seal for cold smoke and an intumescent seal, that expands in a fire situation. Overflow fire damper is equipped on both ends with galvanized sheet metal Grilles mounted on sheetmetal duct extensions.

The product contains galvanized sheet metal, calcium silicate board, fireproof carbon fiberglass, polyurethane foam and ethylene-propylene rubber. These are processed in accordance with local regulations. The product contains no hazardous substances, except for the solder in the thermofuse, which contains a milligram of lead.

Detailed information about accessories for FDS-3G...OF is available in SystemairDESIGN under Fire Damper Accessories.

• AM-FD: Activation Mechanisms

• CBS-FD: Cover Boards