Occupancy sequence, Automatic occupancy, Occupied – KMC Controls BAC-8007 Installation Guide User Manual
Page 59: Unoccupied, Standby
along with the K-factor of the VAV terminal unit are used to calculate the
airflow through the VAV unit.
Occupancy
sequence
A SimplyVAV controller is designed to operate as a stand-alone controller
and determine occupancy based only on the availability of primary airflow
and motion in the zone. The controller can be in any one of the following
occupancy states.
Occupancy can also be commanded by another BACnet device or an operator
workstation connected the building automation network. See the topic
for details.
Automatic occupancy
If Automatic Occupancy is enabled, the controller will automatically toggle
between
Unoccupied
,
Occupied
, and
Standby
based on the presence of primary
airflow and motion in the zone.
The default for Automatic Occupancy is
Disabled
. See the topic
to change Automatic Occupancy.
Occupied
For controllers without a connected motion sensor, the controller changes to
Occupied
upon the detection of primary airflow.
Controllers with a connected motion sensor change to
Occupied
upon the
detection of primary airflow and motion in the space. The unit will remain in
the
Occupied
state as long as periodic motion is detected and primary airflow
continues. If motion stops, the controller changes to
Standby
.
Unoccupied
The controller Occupancy mode changes to
Unoccupied
when it detects a loss
of primary airflow. While in the
Unoccupied
state, the controller will fully
open the damper in an attempt to reach the maximum airflow setpoint.
Loss of primary airflow is defined as less than 25% of the requested flow for
at least 5 minutes. The Occupancy mode changes to
Occupied
or
Standby
once
the actual airflow is at least 30% of the requested flow.
Standby
In units with a connected motion sensor, the controller starts in
Standby
and
changes to
Occupied
after detecting motion in the space. Motion in the space is
SimplyVAV
Section 7: Sequences of operation
Revision E
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