Auto-Zone Control Systems Auto-Zone Plus Systems Installation & Operation (Version 03A) - Manual (Page 12)

Section 1 Auto-Zone Plus
1-8 Design Guide
Zone Controller
The Zone Controller monitors space temperature and positions a damper to maintain
proper air flow to the assigned zone in order to achieve desired comfort and ventilation
levels.
If the current supply air temperature in the duct will benefit the local zone temperature
setpoint, the zone damper will modulate the air flow across the damper as needed to in
order to satisfy the setpoint temperature. If the supply air will not benefit the zone (such
as hot air in the duct when the space is calling for cooling), the controller will direct the
damper actuator to a minimum position and wait for a change in the supply air
temperature to occur that will help achieve the heating or cooling setpoint.
Constant Volume Controller
The Constant Volume (CV) Controller is a microprocessor based controller designed to
operate packaged roof top HVAC units. Up to thirteen stand alone CV controllers can be
connected to each Zone Manager's local communications loop to provide a fully
integrated multizone/single-zone control system. The CV controller operates the fan,
heating, cooling, and economizer functions. Each CV controller also features time
scheduling, night set back, trend logging of sensor values, and automatic changeover.