STE-6000 series discreet temperature sensors—There are three models of the STE-6000
series sensors compatible with the SimplyVAV controllers. If one of the three sensors is
detected, the sensor's temperature is mapped to the Space Temperature Reference value
object as the temperature input value. See the topic BACnet objects on page 67 for
additional information on value objects.
Models STE-6014 and STE-6017 also include a dial for adjusting the setpoint . If either of
these two sensors is detected, the dial position sets the Active setpoint a few degrees
above or below the Occupied setpoint.
The STE-6017 includes a button that when pushed will override the unoccupied state. This
is described in the topic Occupancy sequence on page 50.
Discharge air temperature sensor—The DAT sensor is an optional Type-III, 10 kΩ
thermistor and is required for VAV heating applications. If the controller detects that this
sensor is connected, then the controller will use discharge air temperature to determine
when to change between heating and cooling. The DAT sensor input is used also to control
reheat. See the topics Discharge Air Temperature (DAT) limiting on page 53 and
Changeover on page 53.
Airflow sensors and pickups—VAV airflow is calculated by measuring the high and low
duct pressures with the built-in airflow sensor which is connected to airflow pickup tubes.
The high and low pressure measurements 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.
l Occupied on page 50
l Unoccupied
l Standby
Occupancy can also be commanded by another BACnet device or an operator workstation
connected the building automation network. See the topic System integration and
networking on page 63 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 Advanced options on
page 33 to change Automatic Occupancy.
Occupied
For controllers without a connected motion sensor, the controller changes to Occupied
upon the detection of primary airflow.
Section 7: Sequences of operation KMC Controls, Inc.
50 Revision H
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