Temperature Sensors; Zone Airflow Control - Carrier TruVu VAVB3-E2 Installation And Startup Manual

Start-up

Temperature sensors

The TV-VAVB3-E2 supports the following temperature sensors:
Sensors
Space temperature sensors:
•
Wireless Standard or Plus
•
ZS Standard, Plus, Pro
•
T55
Supply Air Temperature (SAT)
sensor
1 To configure the control program for the desired user interaction with the sensor, see the Wireless Sensors
Application Guide. For detailed instructions, see the Wireless Sensors Installation Guide.
2
For basic user instructions, see the ZS Sensor User Guide. For detailed installation instructions, see the ZS
Sensors Installation Guide.

Zone airflow control

The TV-VAVB3-E2 provides pressure-independent zone temperature control by modulating its damper actuator to
control the flow of primary air into the zone. The controller uses PID control to calculate the airflow setpoint based
on the air source mode and the difference between the zone's temperature and setpoints.
The air source mode determines if the primary air can meet the zone's need. If the zone controller is in a linked
system, the air source mode is determined by the air source. If the zone controller is stand-alone or if linkage
communication fails, the mode is determined by the controller's SAT sensor. See Air source mode determination
(page 71). If the air source mode is the same as the zone's required mode, the damper is positioned so as to
modulate the airflow setpoint between the mode's configurable minimum and maximum airflow based on the
occupancy status of the zone. This minimum insures sufficient minimum airflow at the air source and sufficient
ventilation to the zone during occupied periods.
Single duct with reheat – The Auxiliary Heat Min Airflow allows an increase of primary airflow across the
terminal's ducted heating coil when the terminal operates its local heat. This provides the ability to lower the
cooling minimum airflow limits while providing the necessary airflow when the terminal is heating to ensure design
load conditions and electric heater minimum airflow.
TruVu™ VAVB3-E2
Installation and Start-up Guide
Notes
You can average up to 5 wireless sensors.
1
You can average up to 5 ZS sensors - a combination of temperature,
2
humidity, and/or CO
Push the sensor's override button from 2 to 10 seconds to initiate a
timed override.
If a network space temperature value is used, that value must be written
to the BACnet space temperature point (system_spt) at 1 to 5 minute
intervals or on a COV of 0.1 °F (.06 °C).
If the zone has ducted reheat, install an SAT sensor downstream of the
reheat source. The space temperature is used in controlling the reheat
while the SAT sensor maintains the limit of Maximum Heating SAT.
If heat is not supplied, install the SAT sensor in the duct on the terminal's
inlet air side.
The SAT determines the air source mode should Linkage communication
fail or if the controller is stand-alone. See Air Source Mode Determination
(page 71) for details.
62
2 sensors.
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