Primary States (Central Heating Low Temp Control) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 16.0

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

  • When the Zone Temperature is less than the Zone Setpoint value and the Outdoor Air Temperature is less than Frost Protect OA Setpoint 2, the State is Low OAT and Low Zone.

  • When the Outdoor Air Temperature is less than the Frost Protect OA Setpoint 1 value, the State is Low OAT 1.

  • When the Outdoor Air Temperature is greater than the Frost Protect OA Setpoint 2 value, the State is Low OAT 2.

Table 1. Central Heating Low Temp Control Command Hierarchy

Zone Loop

Boiler

Primary Pumps

State

*

*

*

Normal

*

*

On

Low OAT 1

*

On

On

Low OAT 2

On

On

On

Low OAT and Low Zone