This module is designed for the sequencing the dehumidification process. While dehumidifying, the dehumidification devices are controlled based on the return or zone air relative humidity and the relative humidity setpoint. This module monitors the controlled relative humidity and the status of the cooling and heating devices to determine the current dehumidification control state.
For information on how the FSM determines the state, see FSM (Dehumidification Sequencing).
For an AHU where the reheat occurs at the zones, this module acts as though reheat is available. In addition to monitoring the Zone or Return Humidity, it also monitors the current temperature process variable and, if it rises above setpoint, it returns to normal temperature control.