Primary States (Damper Control for Economizer) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool

Primary States (Damper Control for Economizer) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 13.1

Controller Tool Help

Product

Controls > Control Tools > Controller Configuration Tool

Document type

User Guide

Document number

LIT-12011147

Version

13.1

Revision date

2019-12-04

Pressurize: This mode opens the OAD and closes the RAD and EAD.
Depressurize: This mode opens the EAD and closes the RAD and OAD.
Close: This mode opens the RAD and closes the EAD and OAD.
Purge: This mode opens the EAD and OAD and closes the RAD.
Min OA: This mode puts the EAD and OAD to minimum position. The RAD is 100% - Min Pos.
Hold: This mode holds the dampers in their last position.
Ramp Min OA: This mode ramps the EAD and OAD to Min Pos at a controlled ramp rate. The RAD position is the complement of the EAD position.
Ramp Open: This mode ramps the EAD and OAD open at a controlled ramp rate. The RAD position is the complement of the EAD position.
T Control: This is the free cooling mode. The OAD is modulated to allow outdoor air for cooling purposes. The EAD position is the same as the OAD position, and the RAD position is the complement of the OAD position. The OAD and EAD modulate between the minimum position and 100%.

Table 1. Damper Control for Economizer Command Hierarchy
FSCS OAD Cmd ¹	FSCS EAD Cmd¹	FSCS RAD Cmd 1¹	PID Tuning Reset	Mode	State
!Auto	*	*	*	Pressurize	Pressurize
Auto	!Auto	*	*	Depressurize	Depressurize
Auto	Auto	!Auto	*	Close	Close
Auto	Auto	Auto	*	Purge	Purge
Auto	Auto	Auto	*	Min OA	Min OA
Auto	Auto	Auto	Reset 1st PID	Hold	T Control
Auto	Auto	Auto	*	Hold	Hold
Auto	Auto	Auto	*	Ramp Min OA	Ramp Min OA
Auto	Auto	Auto	*	Ramp Open	Ramp Open
Auto	Auto	Auto	*	T Control	T Control

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