Primary States (Unoccupied Sequencing [MZ] v100) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 16.0

Controller Tool Help
Product
Controls > Control Tools > Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
16.0
Revision date
2023-10-02

This module is implemented using a Hybrid Activity with possible states of Not Unoccupied, Unocc Htg/Clg Check, and Unoccupied Off. When the State is Not Unoccupied, the Unocc Status is set to Unocc Cntrl Not Req’d. When the State is Unoccupied Off, the State is set to Satisfied. When the State is Unocc Htg/Clg Check, the Zone Temperature inputs are monitored to determine whether unoccupied operation is required.

  • Unocc Cntrl Not Req'd: Unit does not require unoccupied sequencing.

  • Satisfied: Unoccupied sequencing is active, but zones are all satisfied.

  • Unocc Htg Clg: Unoccupied sequencing is active and zones require a mix of heating and cooling.

  • Unocc Heating: Unoccupied sequencing is active and zones require heating (only).

  • Unocc Cooling: Unoccupied sequencing is active and zones require cooling (only).

Table 1. Zone Damper Command Hierarchy

Occupancy

Application Mode

WarmupCooldown

Off During Unocc

State

NOT (Unoccupied)

*

*

*

Not Unoccupied

Unoccupied

Vent

*

*

Not Unoccupied

NOT (Vent)

Warmup

*

Not Unoccupied

Cooldown

*

Not Unoccupied

Normal

FALSE

Unocc Htg/Clg Check

Coast

FALSE

Unocc Htg/Clg Check

Normal

TRUE

Unoccupied Off

Coast

TRUE

Unoccupied Off