Patent ID: 6736326
Filing Date: 2004-05-18
Classification: F24F

Abstract:
A thermally powered control assembly for a VAV diffuser comprising:a damper member formed to be mounted across a supply air opening of the diffuser and formed for movement relative thereto to vary the volume of supply air discharged from the diffuser; and a damper position control device including: (i) not more than two thermal sensor-actuators, and (ii) a movable linkage assembly operatively associated with the damper member and with the sensor-actuators to transmit movement of the sensor-actuators to the damper member for displacement of the damper member to vary the volume of supply air discharged from the diffuser in both a heating mode and a cooling mode, the movable linkage assembly being formed to produce changeovers to and from the heating mode and the cooling mode, the movable linkage assembly being formed to begin to move the damper member from a closed position in the heating mode at a heating set point temperature and to begin to move the damper member from a closed position in the cooling mode at a cooling set point temperature and, the linkage assembly being further formed for independent adjustment of the heating set point temperature and the cooling set point temperature.