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PTAC-SVX01C-EN 19
Installation
Energy Management
System
Occupancy States
The controller is designed to handle
two possible occupancy states:
• occupied
• occupied standby
When the Energy Management
System input is present, it is possible
for the controller to switch between
the two occupancy states.
If the EMS input is not connected, the
controller will always assume the
occupied state.
Occupied state
When the controller is in the
occupied state, the unit runs space
comfort control using the occupied
setpoints. All heating/cooling/
ventilation features are enabled.
Table 12. Indoor fan cycle configuration
Config # Indoor Fan Cycle Mode
Indoor fan will not run when the user mode is OFF. (DEFAULT)
0
Indoor fan will cycle to the user selected speed in conjunction with
the compressor or electric heat during HEAT or COOL
Indoor fan will run continuously at the user selected fan speed
during FAN
EMS has no affect.
1
Indoor fan will normally run continuously at the user selected fan
speed.
Indoor fan will not run when the user mode is OFF.
Indoor fan will cycle in conjunction with the compressor or electric
heat when the EMS is enabled.
2
Indoor fan will normally run continuously at the selected fan
speed.
Indoor fan will run at HIGH speed when the user mode is OFF.
Indoor fan will cycle in conjunction with the compressor or electric
heat when the EMS is enabled.
Table 13. Occupancy arbitration for
energy management
EMS Input State
Controller
Occupancy State
Open or Not Present Occupied
Closed Occupied Standby
Occupied Standby state
When the controller is in occupied
standby state, the unit runs space
comfort control using the occupied
standby setpoints. All heating/
cooling/ventilation features are
enabled. Because the occupied
standby setpoints cover a wider
range than the occupied setpoints
the demand for heating and cooling
the space is reduced.