Fire Damper Actuators WFSDc

Features:

• 70 C(or 28 C)automatic shut-off;

• Manual shut-off

• Manual reset

• 24V electromagnet controlled shut-off

• 2 contacts for output signal at shut-off

• 6-stage manually regulated control

• Weight: 2.5kg

• Dimension: 187 x 136 x 108(H)mm

Operations:

Place the main shaft onto the damper spindle, and make sure the damper is in fully open position. Pull the wire so as to move damper¡¯s horizontal rod. This action disengages the cog-claw from the rod, thus the damper closes at once by spring action. Spontaneously, the main shaft turns, and the engaged cam wheel presses down the micro switch that sends out a signal to close the damper. The horizontal rod returns to its original position by the spring action after the cog-claw is disengaged, and is ready for reset again. Similarly, when the electro-magnet is energised, it activates the rod, and the result is just like pulling the steel wire manually.

When the temperature in the airduct reaches 70¡ãC(or 280¡ãC) the sensor (fusible link) activates, hence by spring action, the horizontal rod moves and the damper is closed at once.

6-stage regulating control is implemented by handle as shown.