Coils (VAV-SD Subordinate) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 16.0

Controller Tool Help
Product
Controls > Control Tools > Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
16.0
Revision date
2023-10-02

A separate option is enabled in the Control Selection section to choose how Box Heating and Supplemental Heating are sequenced if both are required.

Note: If you have a VAV heating application using incremental valve actuators with spring return, you must modify the State Table to ensure proper positioning of the valve after a power failure, transfer to the controller, or controller reset.

In the State Table, locate the column for the Proportional Box Heating Control. In the Autocalibration Sequence table, change the action for the state Waiting to Calibrate from * to Max.

This causes the valve to be driven open while the VAV Box damper is closed, to calibrate the flow sensor. When the autocalibration is complete, the valve is commanded to close. This closes the valve with an appropriate Overdrive.

The selection options for Coils are:

  • Box Heating

    • Electric Staged

      • One Stage

      • Two Stages

      • Three Stages

    • Hot Water

      • Proportional Output

      • Incremental Output

      • Two Position Output

    • Packaged Coil (SCR): This module is used for proportional electric heat. SCR stands for Silicon Controlled Rectifier.

      • Include Heating Enable BO

  • Supplemental Heating

    • Electric Stage

    • Hot Water or Steam

      • Proportional Output

      • Incremental Output

      • Two Position Output

    • Packaged Coil (SCR): This module is used for proportional electric heat. SCR stands for Silicon Controlled Rectifier.

      • Include Heating Enable BO