SystemAir PKI-C EI120S, Manual, Page: 28 / 63

Actuators & Control accessories
Fig. 18 Actuator BF
Actuator operation Types: DV7 / DV8 / DV9-T / DV9-T-ST
For operation of damper blade are used actuator BELIMO type
BLF24-T / ST, BLF230-T, BF24-T / ST, BF230-T with return
spring.
Type BLF is used for round dampers to ø500 mm included.
Type BF is used for round dampers above ø500 mm.
Function of actuator
After connection to el. feeding is actuator put into operation
position and at the same time actuator return spring tightens.
That means that the damper leaf is in operation position open.
After disconnecting the el. feeding or breaking the heat fuse
the damper leaf closes with energy of return spring - accident
position. Thermoelectrical release device BAE72B-S breaks
when the ambient temperature or the temperature INSIDE the
damper
exceeds 72°C. In actuator are, as standard, situated
two firmly fixed and set up micro switches for indication of
damper end positions- indication of opening and closing the
damper.
Wiring diagrams
Fig. 19 Wiring scheme of actuator BELIMO BF24-T
Fig. 20 Wiring scheme of actuator BELIMO BF24-T-ST Fig. 21 Wiring scheme of actuator BELIMO BF230-T
Fire dampers controls