Data Aire dap4 User Manual

105
Operation of Humidifier
There are two types of humidifiers: Modulated and Non-Modulated (On/Off type).
Each type can control Relative Humidity (default) or Dew Point as described
below.
Non-Modulating, Controlling Relative Humidity:
Humidification mode starts when humidity drops below the Humidity Setpoint
minus the Humidity Deadband. The humidifier turns off when the humidity rises to
1% below the humidity Setpoint.
Non-Modulating, Controlling Dewpoint:
Humidification mode starts when dewpoint drops below the Low Dewpoint
Setpoint. The humidifier turns off when the dewpoint rises above the Dewpoint
Setpoint plus the Low Dewpoint Deadband.
Modulating, Controlling Relative Humidity:
Humidification mode starts when humidity drops below the Humidity Setpoint
minus 1%. As humidity drops, the humidifier demand will rise proportionally to
reach 100% at setpoint –minus deadband. As humidity rises, humidifier demand
will drop proportionally and will turn off when the humidity rises to setpoint minus
0.5%.
Modulating, Controlling Dewpoint:
Humidification mode starts when humidity drops below the Low Dewpoint Setpoint.
As dewpoint drops, the humidifier demand will rise proportionally to reach 100% at
Low Dewpoint Setpoint –minus Low Dewpoint Deadband. As dewpoint rises,
humidifier demand will drop proportionally and turn off when the dewpoint rises
above the Dewpoint Setpoint plus the Low Dewpoint Deadband.
Note: If Humidity Anticipation is enabled, the setpoint in the above examples could
be offset as much as 10% depending on how far temperature is from the
temperature setpoint.

Data Aire dap4 Specifications

General

Brand	Data Aire
Model	dap4
Category	Control Systems
Language	English