Humidification (OASD) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 15.0

Controller Tool Help

Brand
Johnson Controls
Metasys
Product name
Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
15.0
Revision date
2022-11-18
Language
English

These selections provide the logic to control a humidifier if present.

The selection options for Humidification are:

  • Staged

    • One Stage

    • Two Stages

    • Three Stages

    • Four Stages

    • Humidifier Status: This option provides status feedback of the operation of the humidifier.

  • Steam Proportional Valve

    • Isolation Valve

  • Modulated Packaged Unit

    • Humidifier Status: This option provides status feedback of the operation of the Modulated Packaged Unit (humidifier).

  • Scrubber: This option is for a scrubber humidifier, which is a shower head, pump, and basin located in the ductwork. This type of humidifier requires 3 BOs: a pump BO, a drain valve BO, and a BO to close the fill valve. The drain valve and fill valve BOs should actuate together (if draining, close the inlet valve and disable the pump). The operational water level is maintained by a mechanical float valve.

    • Drain Valve: This option provides an output for the drain valve and an output for the fill valve.

      • Open valve if scrubber is inactive: This option provides monitoring of and indicates the status of the pump command and a network input to open the drain valve. If the network input requests the valve to open or if the pump command has been off for a period of time, the drain valve opens. If the pump is required to start, the drain valve closes for a period of time to allow the sump to fill before starting the pump.

      • Open valve on Network Input

    • Humidifier Status: This option provides status feedback of the operation of the Modulated Packaged Unit (humidifier).

  • Control Sensor

    • Zone Humidity

      • During Unoccupied Mode

    • Exhaust Air Humidity

  • Discharge Humidity High Limit Control

The During Unoccupied Mode option is applicable only when Scheduled Occupancy is selected.