Daikin BACnet Series User Manual

IO-DAPPS www.daikinac.com 24
Topics in this secon cover the sequences of operaon for the BACnet™
Thermostat. These are advanced topics for control’s technicians
and engineers.
Room Temperature Setpoints
There are three temperature setpoints each for heang and cooling for
a total of six setpoints.
• Acve cooling
• Occupied cooling
• Unoccupied cooling
• Acve heang
• Occupied heang
• Unoccupied heang
Types of Setpoints
Acve setpoint – The acve setpoint is the current setpoint. The acve
setpoint is determined by the following.
• If the space is occupied, the controller uses the occupied setpoint
• If the space is unoccupied the controller uses the unoccupied
setpoint
• A user with Password 1 can enter an acve setpoint from the
display. This change is for a limited me or unl the next me the
space status changes from unoccupied to occupied
Occupied setpoint – A temperature setpoint entered by the controls
technician during controller setup and system commissioning. This
is the setpoint used when the system is occupied which is usually
controlled by the schedule in the controller.
Unoccupied setpoint – A temperature setpoint entered by the controls
technician during controller setup and system commissioning. This
is the setpoint used when the system is unoccupied which is usually
controlled by the schedule in the controller.
Setpoint Limits
No cooling setpoint can be higher than any heang setpoint.
If a user is adjusng a setpoint and it comes with the range set by
Minimum Setpoint Dierenal, the corresponding setpoint will be
changed to maintain the dierenal. For example, the Minimum
Setpoint Dierenal is 4°F and the Occupied Heang setpoint is 70°F.
If the user lowers the Occupied Cooling setpoint to 71°F, the controller
recalculates the Occupied Heang setpoint and changes it to 67°F.
Occupancy
The BACnet Thermostat is designed to operate as a stand-alone
controller and can determine occupancy based on its internal
occupancy schedule. The two occupancy states of the BACnet
Thermostat are Occupied and Unoccupied. An occupancy state can
also be commanded by another BACnet controller on the building
automaon network.
Occupied
If the internal schedule is enabled, the state of the schedule is set to
either occupied or unoccupied as the inial state.
Unoccupied
The unoccupied state is entered only if the internal occupancy schedule
is enabled and if the schedule is inacve.
Automac Cooling and Heang
Changeover
The BACnet Thermostat can be set to automacally change between
the heang and cooling modes.
• If the space temperature rises above the acve cooling setpoint,
the mode is set to cooling
• If the space temperature falls below the acve heang setpoint,
the mode is set to heang
Schedules
The internal occupancy schedule changes the BACnet Thermostat
between the occupied (acve) and unoccupied (inacve) states.
Sequences of Operaon

Daikin BACnet Series Specifications

General

Communication Protocol	BACnet MS/TP
Display Type	LCD
Power Supply	24 VAC
Mounting Type	Wall Mount
Accuracy	±0.5°C
Operating Temperature	0°C to 50°C
Weight	150g