Operation Of Humidifier - Data Aire dap4 User Manual

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. The humidifier
operation depends on these settings. Please refer to the section that applies to
your equipment:
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.
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