| 摘要 |
<p>A variable air volume ventilating system (40) includes a fan volume modulator (73), for controlling a series terminal fan (67). A controller (69) determines the proper fan motor (75) speed, and generates a control signal which is transmitted to the fan modulator (73) for varying the volume of the fan (67) to be at least equal to the volume of the primary air (48) available.</p> |
