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8 VAV-SLM002-EN
Digital Display Zone Sensor
The new digital display zone sensor has the look and functionality of the
standard Trane zone sensor, but includes an LCD digital display of the
space temperature and setpoint adjustment in degrees F or C. The
sensor has ON and CANCEL buttons, and a communications jack which
can be accessed without removing the cover. The sensor requires 24
volts, and may share a power supply with UCM.
Zone Occupancy Sensor
The new zone occupancy sensor is a ceiling-mount infrared motion
detector to be used with VariTrac zone damper UCM for controlling the
occupied zone standby function. It can detect motion over a 360 degree
range (adjustable) for up to a 1200 square foot area. It has SPDT
isolated contacts for connection to the UCM occupancy input. The
sensor requires 24 volts, and may share a power supply with UCM.
Zone CO2 Sensor
The zone CO2 sensor is a compact transmitter for use with the VariTrac
UCM CO2 input for doing demand control ventilation. The sensor is a
available in either wall- or duct-mount enclosures. The sensor requires
24 volts, and may share a power supply with UCM.
VariTrac PC Software
Advanced set-up functions in VariTrac are now done with a new
Windows®-based, graphical PC software program. Connection between
the PC and the CCP is done with a standard serial port cable connection.
VariTrac Function Overview
Increased Zone Count
The new VariTrac system now support 24 zones instead of 16. The
zones may be VariTrac dampers, or any type of VariTrane VAV box
including fan-powered boxes or boxes with factory-installed local heat.
Automatic Configuration and Start-up
The VariTrac system performs automatic configuration on start-up by
locating all zone dampers or VAV boxes on the communications link and
creating a database of zones, complete with default names. VariTrac
takes control of all the zone dampers and calibrates them. It then
calibrates the bypass system, establishes its own static pressure
setpoint, and begins heating/cooling operation.
Discharge Air Control
VariTrac now does discharge air control. When there is a demand for
heating or cooling from a zone, the CCP will control the discharge air
temperature to the discharge air setpoint default (55°F cooling, 110°F
heating), using as many stages as necessary. This allows VariTrac to do
true capacity control under part-load conditions, and better manage the
load created by increased ventilation air requirements.