Air Temperature Actuator

The air temperature actuator is a 3 wire bi-directional electric motor. Ignition voltage, ground and control circuits enable the actuator to operate. The control circuit uses a zero-12 volt linear-ramped signal to command the actuator movement. The zero and 12 volt control values represent the opposite limits of the actuator range of motion. The values in between zero and 12 volts correspond to the positions between the limits. When the HVAC control assembly sets a commanded, or targeted, value, the control signal is set to a value between zero-12 volts. The actuator shaft rotates until the commanded position is reached. The module will maintain the control value until a new commanded value is needed.