
4/37 | FDR-3G…KS
Fire damper with an activation mechanism H0 + 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.
Actuator Operated Fire Dampers
By default, all actuator operated fire dampers are supplied with an actuator with micro switches, optionally with a
power and communication unit. A fire damper can be 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.
Belimo actuator available with on demand fuse 95 °C or 120 °C.
• B230T-KS or G230T-KS
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-KS or G24T-KS
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.
• BST0-KS or GST0-KS
Fire damper with an activation mechanism with a Belimo or Gruner spring return actuator (AC/DC 24 V) with an
electro-thermal fuse 72°C and auxiliary switches, with a Belimo supply and communication unit BKN230-24 or Gruner
supply and communication unit fs-UFC24-2 (other communication units on demand).
• B24T-W-KS or G24T-W-KS
Fire damper with an activation mechanism with a Belimo or Gruner spring return actuator (AC/DC 24 V) with an
electro-thermal fuse 72°C and auxiliary switches, with provided cable connectors for the supply and communication
unit (communication unit not part of the mechanism).
• B24T-SR-KS or G24T-SR-KS
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 for Modulated dampers (possibility to open the blade at the desired angle).
For fire dampers in the size DN ≥ 160 mm.
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.
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 is available in SystemairDESIGN under Fire Damper Accessories.
• AM-FD: Activation Mechanisms