Abstract: A damper actuator assembly comprises a gear train including a follower gear. The follower gear is arranged such that the position of the follower gear indicates the position of at least one blocking member of a damper that the actuator is connected to. A sensor is positioned within the damper actuator and is configured to monitor the position of the follower gear. Accordingly, the sensor is configured to provide an electrical signal indicative of the position of the follower gear to a processor. A driving member is connected to the gear train and is configured to drive the gear train at two or more variable speeds depending on the electrical signal provided to the processor from the sensor.

Abstract: A damper actuator assembly comprises a gear train including a follower gear. The follower gear is arranged such that the position of the follower gear indicates the position of at least one blocking member of a damper that the actuator is connected to. A sensor is positioned within the damper actuator and is configured to monitor the position of the follower gear. Accordingly, the sensor is configured to provide an electrical signal indicative of the position of the follower gear to a processor. A driving member is connected to the gear train and is configured to drive the gear train at two or more variable speeds depending on the electrical signal provided to the processor from the sensor.

Abstract: A damper actuator for a ventilation damper serves as both a control device for the ventilation damper and a fire and smoke rated device for the ventilation damper. The damper actuator includes a modulating motor controller, a two-point motor controller, and a thermal switch or switch like device that is operative to switch control of the motor from the modulating motor controller used during normal operation, to the two-point motor controller during a fire and smoke condition. The damper actuator provides an automatic and permanent disabling (by-passing) of the modulating motor controller functions the first time a pre-determined temperature level (switch point) is reached via the thermal switch or switch like device. Once the modulating motor controller is disabled, the actuator no longer supports the advanced motor control functions (i.e. the modulating control).

Abstract: A damper actuator assembly comprises an actuator and an electronic fusible link (EFL) connected by at least one wire. The actuator comprises an actuator housing with actuator leads extending from the actuator housing. The actuator leads include a first quick connect positioned on an end of the actuator lead. A flexible conduit material covers the actuator lead. The EFL comprises an EFL housing which is separate from the actuator housing. The EFL housing includes a quick connect seat and an integral conduit adaptor. A second quick connect is positioned on an end of the EFL lead. When the end of the flexible conduit material that includes the actuator lead and first quick connect is inserted into the integral conduit adaptor of the EFL housing, the first quick connect is coupled to the second quick connect and an electrical connection is established between the actuator and the EFL.

Abstract: A damper actuator for a ventilation damper serves as both a control device for the ventilation damper and a fire and smoke rated device for the ventilation damper. The damper actuator includes a modulating motor controller, a two-point motor controller, and a thermal switch or switch like device that is operative to switch control of the motor from the modulating motor controller used during normal operation, to the two-point motor controller during a fire and smoke condition. The damper actuator provides an automatic and permanent disabling (by-passing) of the modulating motor controller functions the first time a pre-determined temperature level (switch point) is reached via the thermal switch or switch like device. Once the modulating motor controller is disabled, the actuator no longer supports the advanced motor control functions (i.e. the modulating control).