SystemAir FDR-3G, Manual

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FDR-3G…OF

• Low pressure drop

• Changeable mechanism

• Inspection opening built-in

• Great variety of installations rated up to EI120S

Activation Types

• 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).

Design

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.

Material Composition

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.

List of Accessories

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