Setpoint limits
The programming in the AppStat will limit the setpoint entry so that no
heating setpoint is set higher than its corresponding cooling setpoint.
If a user is adjusting a setpoint and it falls within the range set by the value of
Minimum Setpoint Differential, the corresponding setpoint will be changed to
maintain the differential. For example, the Minimum Setpoint Differential is
4° F and the Occupied Heating setpoint is 70° F. If the user lowers the
Occupied Cooling setpoint to 71° F, the controller recalculates the Occupied
Heating setpoint and changes it to 67° F.
Occupancy, motion
sensing, and
standby
The AppStat is designed to operate as a stand-alone controller and can
determine occupancy based on its internal occupancy schedule and, on models
with motion sensors, motion in the space. The AppStat can be in any one of
the following occupancy states.
Occupied
Unoccupied
Standby
The controller chooses which setpoint to use based on the occupancy and
standby states. See the topic
for the
sequence on determining setpoints.
The occupancy and standby states can also be commanded by another
BACnet device or an operator workstation connected to the building
automation network. See the topic
for details on
BACnet value object configuration.
Occupied
—For controllers without a motion sensor, the AppStat starts in the
occupied state. If the internal schedule is enabled, the state of the schedule is
set to either
occupied
or
unoccupied
as the initial state. See the topic
.
Unoccupied
—The controller changes to the
Unoccupied
state only if the
internal occupancy schedule is enabled and if the schedule is inactive.
Standby
—In units with a motion sensor, the controller starts in
standby
and
changes to
occupied
only after detecting motion in the space. The controller
will change from
occupied
to
standby
after a lack of motion for the period
specified by the variable Standby Time.
Installation, Operation, and Application Guide for AppStat
Section 5: Sequences of operation
Revision G
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Содержание BAC-4000 series
Страница 6: ...Contents KMC Controls Inc 6 Revision G ...
Страница 30: ...Section 2 Installing the AppStat KMC Controls Inc 30 Revision G ...
Страница 64: ...Section 4 Commissioning functions KMC Controls Inc 64 Revision G ...
Страница 112: ...Section 6 Application drawings KMC Controls Inc 112 Revision G ...
Страница 124: ...Section 7 System integration KMC Controls Inc 124 Revision G ...
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