Primary States (Cooling Proportional Valve with Dehumidification) - 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
  • Off: Turn everything off. The Cooling Percent Cmd is set to 0%.

  • Max: Open the cooling valve. The Cooling Percent Cmd is set to 100%.

  • Hold: Hold the outputs at their current position.

  • Water Flush: The valve is opened to the Water Flush Position.

  • Limited Max: The valve is opened to the Limited Max Value. This state may be used for unoccupied cooling.

  • T Control: Adjust the cooling valve to control the Process Variable. If the Process Variable is reliable, the module controls the output in order to maintain the Process Variable Setpoint. The Cooling Percent Cmd is adjusted between 0% and 100%.

  • H Control: Adjust the cooling valve to control the humidity. If the humidity is reliable, the module controls the output to maintain the humidity at the dehumidification setpoint. The Cooling Percent Cmd is adjusted between 0% and 100%.

  • Low OA Temperature: The valve is opened to the Low OA Temperature Position when the OA Temperature is less than the Low OA Temperature Setpoint.

  • Failsoft: The valve is opened to the Fail Soft Position. This state may be used when the process variable is unreliable.

Table 1. Cooling Proportional Valve with Dehumidification Command Hierarchy

OA Temperature is Reliable

PID Tuning Reset

Mode

State

*

*

Off

Off

Max

Max

T Control

T Control

H Control

H Control

Reset 1st PID

Hold

T Control

Reset 2nd PID

Hold

T Control

*

Hold

Hold

TRUE

Low OA Temperature

Low OA Temperature

FALSE

Low OA Temperature

Limited Max

*

Water Flush

Water Flush

Limited Max

Limited Max