Mechanical System Troubleshooting - 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
Check that the mechanical system is available, operational, and of the required capacity. Some situations that contribute to PRAC+ tuning problems during construction and system startup include the following:
  • The cooling output was controlled when chilled water was not available.
  • The heating output was controlled when hot water was not available.
  • The VAV boxes or static pressure output was allowed to control when the air system was not running.
  • The system does not have the capacity to meet the load.
  • Valve installation is incorrect. Valves must be installed in the correct direction, free of debris, powered, calibrated and wired correctly so they can fully open and fully close.
  • Damper installation is incorrect. Dampers must be able to open and close, with actuators mounted, wired correctly, and calibrated.
  • VFD and PID low limit are set incorrectly. The VFD must be calibrated and in auto. The PID low limit should be set to the minimum output of the drive.
  • Sensor installation is incorrect. The sensors must be wired and located properly.