Primary States (Damper Control for Relief Fan) - 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
  • Pressurize: This mode opens the OAD and closes the RAD.

  • Depressurize: This mode closes the RAD and OAD.

  • Close: This mode opens the RAD and closes the OAD.

  • Purge: This mode opens the OAD and closes the RAD.

  • Min OA: This mode moves the OAD and RAD to the appropriate position for minimum outdoor airflow.

  • Hold: This mode holds the dampers in their last position.

  • Ramp Min OA: This mode ramps the OAD to the minimum position and ramps the RAD to 100%.

  • Ramp Open: This mode ramps the OAD to 100% and the RAD to 0%.

  • T Control: This is the free cooling mode. The OAD and the RAD is modulated to allow outdoor air for cooling purposes. The OAD modulates from minimum position to 100%. If more outdoor air is required, the RAD modulates from 100% to 0%.

Table 1. Damper Control for Relief Fan Command Hierarchy

Mode

FSCS OAD Cmd 1

PID Tuning Reset

FSCS RAD Cmd1

State

*

!Auto

*

*

FSCS Control

*

Auto

*

!Auto

 

FSCS Control

Auto

*

Auto

 

Pressurize

Auto

*

Auto

Pressurize

Depressurize

Auto

*

Auto

Depressurize

Close

Auto

*

Auto

Close

Purge

Auto

*

Auto

Purge

Min OA

Auto

*

Auto

Min OA

Hold

Auto

Reset 1st PID

Auto

T Control

Hold

Auto

*

Auto

Hold

Ramp Min OA

Auto

*

Auto

Ramp Min OA

Ramp Open

Auto

*

Auto

Ramp Open

T Control

Auto

*

Auto

T Control

1 The FSCS Cmds (OAD, RAD) are not used.