Primary States (Cooling FBPD 2 Position Valve with Dehumidification) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 16.0

Controller Tool Help

Brand
Johnson Controls
Metasys
Product name
Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
16.0
Revision date
2023-10-02
Language
English
  • Off: Turn everything off. The Damper Percent Cmd is set to 0%.

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

  • Hold: Hold the outputs at their current position.

  • Water Flush: The valve opens to the Water Flush Position and the face and bypass damper closes.

  • Limited Max: The valve is open, and the damper is opened to the Limited Max Value. This state may be used for unoccupied heating or cooling.

  • T Control: The valve is open, and the damper is modulated to control the process variable to the setpoint. The Damper Percent Cmd is adjusted between 0% and 100%.

  • H Control: The cooling valve is opened, and the face and bypass damper is modulated to control the humidity process variable to the humidity setpoint. Adjust the cooling valve to control the humidity. The Damper Percent Cmd is adjusted between 0% and 100%.

  • Low OA Temperature: The valve is opened and the face and bypass damper is opened to 100% when the OA Temperature is less than the Low OA Temperature Setpoint.

  • Failsoft: The valve is opened and the face and bypass damper is opened to the Failsoft Value. This state may be used when the control temperature is unreliable.

  • Face: The valve is closed, but the damper is opened to 100% face. This state may be used during heating if the unit needs the FBPD to be 100% face while using electric heat.

Table 1. Cooling FBPD 2 Position Valve with Dehumidification Command Hierarchy

Mode

OA Temperature is Reliable

PID Tuning Reset

State

Off

*

*

Off

Max

Max

T Control

T Control

H Control

H Control

Hold

Reset 1st PID

T Control

Hold

Reset 2nd PID

H Control

Hold

 

Hold

Low OA Temperature

TRUE

*

Low OA Temperature

Low OA Temperature

FALSE

Limited Max

Water Flush

*

Water Flush

Limited Max

Limited Max

Failsoft

Failsoft

Face

Face