Auto-Zone Control Systems Auto-Zone CV-C Controller Installation Guide (Version 01A) - Manual (Page 30)

Section 2 Auto-Zone CV-C
2-20 Sequence of Operation
Humidity Control Humidity Control Humidity Control Humidity Control
If you selected the De-Humidification control using DX Cooling or the Chilled Water
Valve, then that operation is discussed in those sections. This section applies to an Output
Relay that has been assigned to humidity control or an Analog Output that is assigned to
control the humidity level. If an external device will be used to increase or decrease the
humidity but it needs an enable signal from the CVC, then this is the mode to select.
Humidification ( Relay Enable )
As the humidity drops below the user adjustable Humidity Setpoint, the assigned Output
Relay activates. It remains active until the Humidity rises above the setpoint by the user
adjustable Humidity Deadband amount. This operation can occur in both the Occupied
and the Unoccupied mode and the fan will be started if it is not already running.
The only mode that will prevent this Humidification control from occurring is the Fan
Only Mode.
Humidification ( Analog Control )
If you assigned an Analog Output for this mode, the output signal voltage will ramp from
the minimum programmed voltage to the maximum programmed voltage ( 0 to 100% ) as
the Humidity drops below the setpoint. When the humidity level drops below the setpoint
by the Humidity Deadband amount, the output will be at its 100% programmed voltage.
Since the CVC is controlling this voltage signal, this mode requires the fan to be running.
If the voltage signal is greater than 0% the fan is verified to be running or it is started.
The only mode that will prevent this Humidification control from occurring is the Fan
Only Mode.
De-Humidification ( Relay Enable )
If you aren’t using mechanical cooling to control the humidity level, then you can assign
an Enable Relay to activate whenever the Humidity rises above the Humidity Setpoint. It
will remain on until the humidity drops below the setpoint by the Humidity Deadband
amount.
The only mode that will prevent this Humidification control from occurring is the Fan
Only Mode.
No Analog Output Control is available for De-Humidification.