Mandik FDMS, Руководство пользователя

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The damper is equipped with electric actuating mechanism. There are several actuators depending on the damper size: GRUNER
340CTA-024D-XX-S2-V/8F12/ST06/BP8. To ensure the VAV function there is an Gruner universal actuator controller GUAC-DM3
for air flow control and GUAC-PM3 for pressure control. After connection to the power supply AC/DC 24V, the actuating
mechanism displaces the damper blade into operation position given by the required air volume flow. At the same time is
pre-stretched back spring inside the actuator. When the actuator is under voltage (on power supply), the damper´s blade is in the
position given by the required air volume flow. The back spring is pre-stretched. If the power supply of the actuator is cut off (due
to disconnection of power supply, or pressing the reset button on the thermo-electrical starting mechanism BAT (thermal fuse),
the back spring displaces the damper´s blade into the safety position "CLOSED". The time needed for displacing of the blade from
the position "OPEN" to the position "CLOSE" takes maximal 20s. In the case that the power supply is restored again (the blade
can be in arbitrary position), the actuator starts re-displacing the damper´s blade position given by the required air volume flow.
The thermos-electrical mechanism BAT, which contains two thermal fuses Tf1 and Tf2, is a part of actuator. These fuses are
activated when tempe72°C has been exceeded. The fuse Tf1 measures the temperature in the outside of the damper and
Tf2 measure the temperature inside the air duct. Both fuses, they are in serial connection. It means in fact, that when one of them
is activated, the power supply of the actuator is cut-off and the actuator displaces the blade in safety position "CLOSED". The
signalization of damper position "OPEN" or "CLOSED" is provided by two limit switches, which are built-in inside the actuator. The
fire damper has a part with controller consists of the body of the controller with a control blade and pressure probes for determining
the through-flow of air. A controller is affixed to the body for controlling the control blade, which is in this case the blade of the fire
damper.