Primary States (Smoke Control Sequencing for UL-864-UUKL) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool

Primary States (Smoke Control Sequencing for UL-864-UUKL) - 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

Normal: This is the normal operational state. No emergency response or shutdown is required. The sequencer transitions to this state after being in Shutdown for the Shutdown Delay and the Emergency Mode is in Normal and all the Safety Switches are in Normal state.
Pre-Shutdown: Indicates to stop heating, cooling, and ventilating. The sequencer transitions to this state from Normal if Emergency Mode is set to Shutdown or any Safety Switch goes to Alarm. The sequencer transitions to Pre-Shutdown from Depressurize, Pressurize, or Purge if Emergency Mode is set to Shutdown or any Safety Switch goes to Alarm. Pre-shutdown allows the fans to spin down and the dampers to close, which resets the fans and dampers before entering the Normal state.
Shutdown: Stops heating, cooling, and ventilating. The sequencer transitions to this state after being in Pre-Shutdown for the Shutdown Delay.
Pressurize: The sequencer enters this fire emergency state when the Emergency Mode is set to Pressurize and all the Safety Switches are in Normal. The zone is pressurized to prevent smoke from entering the zone. When pressurizing, the OAD opens, the supply fan is on, the RAD closes, the return fan is off, and the EAD closes. Also, command the VAV boxes in the affected zones to Open.
Depressurize: The sequencer enters this fire emergency state when the Emergency Mode is set to Depressurize and all the Safety Switches are in Normal. The zone is depressurized to draw smoke out of the zone. When depressurizing, the OAD closes, the supply fan is off, the RAD closes, the return fan is on, and the EAD opens. Also, command the VAV boxes in the affected zones to Closed.
Purge: The sequencer enters this fire emergency state when the Emergency Mode is set to Purge and all the Safety Switches are in Normal. The exhaust dampers open, the exhaust fan is on, the supply dampers open, and the supply fan is on. The air in the zone is vented to the outside, and fresh air is brought into the zone. Also, the VAV boxes in the affected zones are commanded Open.