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6 Minute Read

| Overview

Carrier BMS has introduced multiple schedule states in the system. The different schedule states are introduced with the notion of the core vision of energy savings and occupant comfort in the buildings.

The following are the schedule states that are introduced:

  • Unoccupied
  • Preconditioning 
  • Occupied
  • Force Occupied
  • Auto Force Occupied
  • Emergency Conditioning
  • Vacation

For more information on the schedule, states refer to Schedules & Schedule States

The schedule states are implemented throughout the Carrier BMS. The schedule states are applicable for all profiles that use the Carrier CCU as an aggregator. 

| Schedule State Influencers

Influencers are nothing but factors that contribute to different schedule states' triggers.

There are two types of influencers that contribute to the schedule states' trigger.

  • Internal 
  • External

The table below is about different types of influencers:

 

Types of Schedules Supported in Carrier

Definitions

 

Internal User Intent Set

The schedule user intents that are set by FMs, Support, End User

1

Building Schedule

 

2

Zone Schedule

 

3

Special Schedule

 

4

Named Schedule

 

5

Vacation [Building Level and Zone Level]

 

 

External Schedule Influencers

Schedule Overrides that are influenced by external triggers

6

Occupancy Sensor

 

7

Keycard Input

 

8

Door/Window Input

 

 

| Precedence Hierarchy 

Based on whether the building is in unoccupied or occupied time of the actual schedule. The precedence hierarchy of the schedule states and schedule state influencers differs.

The table below provides information on that.

 Order

Priority Order

Precedence order during Occupied

 Precedence order during Unoccupied

Highest

1

Door/Window Input

Door/Window Input

 

2

Keycard Input

Keycard Input

 

3

Auto-away

Preconditioning

 

4

Emergency Conditioning

Forced Occupied

 

5

Occupied

Auto Forced Occupied

 

6

 

Emergency Conditioning

 

7

 

Vacation

Lowest

8

 

Unoccupied

 

Schedule States Precedence Order:

Order Schedule States
Highest Occupied
  Preconditioning
  Forced Occupied
  Auto Forced Occupied
  Emergency Conditioning
  Autoaway
Lowest Unoccupied

 

| Schedule States & the Priority Levels

With the above hierarchy and precedence, the different schedule states and the influencers induce change to the desired temperatures at different level of the priority array as below.

Priority Array Level Schedule States Influencers
Level 3 Auto Away Door/Window/ Key Card/ Occupancy sensor
Level 4 Forced Occupied/ Auto Forced Occupied Door/Window/ Key Card/ Occupancy Sensor/ User Intent change
Level 8 Occupied/Unoccupied Schedules (Building/Zone/Vacation)

From the above table:

  • An Autoaway trigger induced by a door/window/key card/occupancy sensor, overrides desired temperature limits at level 8, coming from level 3 by the Autoaway setback value
  • An Auto Forced Occupied trigger induced by a door/window/key card/occupancy sensor overrides the Auto away setback or building setback temperature limits at level 8, coming from level 3 to the desired temperature limits (e.g., 70-74)
  • A Forced Occupied trigger induced by a user intent, overrides the Auto away setback or building setback temperature limits at level 8, coming from level 3 to desired temperature limits (e.g., 70-74).
  • The Occupied and Unoccupied are triggered with the set schedules at level 8

| Important points to remember

  • Door/Window Sensor input will not affect the system level functioning, but the individual Standalone Equipment alone.
  • Auto-away and Auto forced Occupied are not triggered at the same time.
  • Auto-away is not triggered during an unoccupied time.
  • Forced Occupied or Auto forced occupied are not triggered during the occupied time.

| Different Zone Level Schedule States and Effects on System Level/Building Level Schedule State

A building can have many rooms that are configured as zones in the Carrier BMS. With all schedule states and schedule state influencers in place, it is highly unpredictable, what zone is in what schedule state and what time. Hence it is highly recommended that a facility manager understands how various combinations of the schedule states affect the building in real-time. 

The table below is about various possible combinations of schedule states that zones in the building can experience at any given point of time, and the resultant effect of it on the building.

Zone 1 Zone 2 Zone 3 Zone 4 Zone 5 Zone 6 System Status
Unoccupied Occupied Occupied Occupied Occupied Occupied Occupied
Unoccupied Occupied Occupied Occupied Occupied Occupied Occupied
Unoccupied Unoccupied Occupied Occupied Occupied Occupied Occupied
Unoccupied Unoccupied Unoccupied Occupied Occupied Occupied Occupied
Unoccupied Unoccupied Unoccupied Unoccupied Occupied Occupied Occupied
Unoccupied Unoccupied Unoccupied Unoccupied Unoccupied Occupied Occupied
Unoccupied Unoccupied Unoccupied Unoccupied Unoccupied Unoccupied Unoccupied
Forced Occupied Unoccupied Unoccupied Unoccupied Unoccupied Occupied Occupied
Forced Occupied Occupied Occupied Unoccupied Unoccupied Unoccupied Occupied
Forced Occupied Forced Occupied Occupied Occupied Unoccupied Unoccupied Occupied
Forced Occupied Forced Occupied Forced Occupied Occupied Occupied Occupied Occupied
Forced Occupied Forced Occupied Forced Occupied Forced Occupied Occupied Occupied Occupied
Forced Occupied Forced Occupied Forced Occupied Forced Occupied Forced Occupied Occupied Occupied
Forced Occupied Forced Occupied Forced Occupied Forced Occupied Forced Occupied Forced Occupied Forced Occupied
Auto Forced Occupied Occupied Occupied Occupied Occupied Occupied Occupied
Auto Forced Occupied Occupied Occupied Occupied Unoccupied Unoccupied Occupied
Auto Forced Occupied Auto Forced Occupied Occupied Occupied Occupied Occupied Occupied
Auto Forced Occupied Auto Forced Occupied Auto Forced Occupied Occupied Occupied Occupied Occupied
Auto Forced Occupied Auto Forced Occupied Auto Forced Occupied Auto Forced Occupied Occupied Occupied Occupied
Auto Forced Occupied Auto Forced Occupied Auto Forced Occupied Auto Forced Occupied Auto Forced Occupied Unoccupied Auto Forced Occupied
Auto Forced Occupied Auto Forced Occupied Auto Forced Occupied Auto Forced Occupied Auto Forced Occupied Auto Forced Occupied Unoccupied
Vacation Occupied Occupied Occupied Occupied Occupied Occupied
Vacation Occupied Occupied Occupied Occupied Occupied Occupied
Vacation Vacation Occupied Occupied Occupied Occupied Occupied
Vacation Vacation Vacation Occupied Occupied Occupied Occupied
Vacation Vacation Vacation Vacation Occupied Occupied Occupied
Vacation Vacation Vacation Vacation Vacation Unoccupied Unoccupied
Vacation Vacation Vacation Vacation Vacation Vacation Vacation
Preconditioning Occupied Occupied Occupied Occupied Occupied Occupied
Preconditioning Occupied Occupied Occupied Occupied Occupied Occupied
Preconditioning Preconditioning Occupied Occupied Occupied Occupied Occupied
Preconditioning Preconditioning Preconditioning Occupied Occupied Occupied Occupied
Preconditioning Preconditioning Preconditioning Preconditioning Occupied Occupied Occupied
Preconditioning Preconditioning Preconditioning Preconditioning Preconditioning Occupied Occupied
Preconditioning Preconditioning Preconditioning Preconditioning Preconditioning Preconditioning Preconditioning
Preconditioning Occupied Vacation Occupied Occupied Occupied Occupied
Autoaway Occupied Occupied Occupied Occupied Occupied Occupied
Keycard Autoaway Preconditioning Occupied Occupied Occupied Occupied Occupied
Door Open Autoaway Forced Occupied Occupied Occupied Occupied Occupied
Forced Occupied Keycard Autoaway Preconditioning Autoaway Occupied Occupied Occupied
Preconditioning Door Open Preconditioning Keycard Autoaway Auto Forced Occupied Occupied Occupied
Vacation Unoccupied Vacation Door Open Preconditioning Auto Forced Occupied Occupied
Autoaway Occupied Occupied Occupied Occupied Occupied Occupied
Autoaway Occupied Door Open Preconditioning Keycard Autoaway Occupied Occupied
Autoaway Autoaway Occupied Door Open Preconditioning Keycard Autoaway Occupied
Autoaway Autoaway Autoaway Occupied Occupied Occupied Occupied
Autoaway Autoaway Autoaway Autoaway Occupied Occupied Occupied
Autoaway Autoaway Autoaway Autoaway Autoaway Occupied Occupied
Autoaway Autoaway Autoaway Autoaway Autoaway Autoaway Autoaway
Keycard Autoaway Occupied Occupied Occupied Occupied Occupied Occupied
Keycard Autoaway Occupied Occupied Door Open Preconditioning Keycard Autoaway Occupied
Keycard Autoaway Keycard Autoaway Occupied Occupied Occupied Occupied Occupied
Keycard Autoaway Keycard Autoaway Keycard Autoaway Occupied Occupied Occupied Occupied
Keycard Autoaway Keycard Autoaway Keycard Autoaway Keycard Autoaway Occupied Occupied Occupied
Keycard Autoaway Keycard Autoaway Keycard Autoaway Keycard Autoaway Keycard Autoaway Occupied Occupied
Keycard Autoaway Keycard Autoaway Keycard Autoaway Keycard Autoaway Keycard Autoaway Keycard Autoaway Keycard Autoaway
Door Open Occupied Occupied Occupied Occupied Occupied Occupied
Door Open Occupied Door Open Preconditioning Keycard Autoaway Occupied Occupied
Door Open Door Open Occupied Door Open Preconditioning Keycard Autoaway Occupied
Door Open Door Open Door Open Occupied Occupied Occupied Occupied
Door Open Door Open Door Open Door Open Occupied Occupied Occupied
Door Open Door Open Door Open Door Open Door Open Occupied Occupied
Door Open Door Open Door Open Door Open Door Open Door Open Occupied
Emergency Conditioning Occupied Occupied Occupied Occupied Occupied Emergency Conditioning
Emergency Conditioning Occupied Door Open Preconditioning Keycard Autoaway Occupied Emergency Conditioning
Emergency Conditioning Door Open Occupied Door Open Preconditioning Keycard Autoaway Emergency Conditioning
Emergency Conditioning Door Open Door Open Occupied Occupied Occupied Emergency Conditioning
Emergency Conditioning Door Open Door Open Door Open Occupied Occupied Emergency Conditioning
Emergency Conditioning Door Open Door Open Door Open Door Open Occupied Emergency Conditioning
Door Open Emergency Conditioning Preconditioning Keycard Autoaway Keycard Autoaway Occupied Emergency Conditioning

 

 

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