Installation and Maintenance Manual

VAV-SVX07A-EN 9
General Information
Flow Tracking
The Tracer™ UC400 controller is designed with the ability to be applied in flow tracking
applications. This allows the controller to be paired with one of its peers to mirror the flow of the
lead unit, with or without an offset (positive or negative static pressure as desired).
Ventilation Flow Control with Tempering
The Tracer UC400 controller is designed with the ability to be applied in ventilation flow control
applications. These applications pair a fresh air unit with ventilation boxes to provide fresh
(tempered) air to a zone. This feature also includes a freeze protection sequence to protect the hot
water reheat coil from low supply air temperatures.
Auto-commissioning Sequence
The TracerUC400 controller is designed with an auto-commissioning sequence. With a discharge
air temperature sensor, this feature exercises the air valve, fan, and heat in the box and records the
temperature before and after the action. This allows the installer to more easily verify the operation
of the unit and commission by exception. An auto-commissioning report can be generated with
Tracer TU service tool.
Automatic Calibration
The Tracer UC400 controller is designed to automatically calibrate the flow transducer each time
the unit transitions to unoccupied. This eliminates the need to initiate/schedule calibration for most
installations. The exception is 24/7 sites, in which case Tracer SC can be used to initiate/schedule
calibration.
Temporary Heat (Construction Mode)
Upon reset (and power-up) if the controller does not detect a valid space temperature the controller
will provide temporary heat by driving the air valve to the heating maximum position.
Note: Note that the unit will only provide heat if hot air is being provided by the air-handling
unit.
Local Versus Remote Reheat Flexibility
The controller can be configured to have local and/or remote heat. Plus, configuration flexibility is
offered that allows the installer to select whether local or remote heat has priority.
Spare Inputs and Outputs
The Tracer UC400 controller has spare I/O that are not used by the VAV applications. These spare
I/O can be programmed using the Tracer Graphical Programming editor (by means of the Tracer
TU service tool) to measure and/or control ancillary devices such exhaust fans, second air valve for
dual duct VAV or sensing relative humidity.
Removable Terminals
The Tracer UC400 controller connectors are two-part connectors that have 5.08 mm pin separation.
The headers are attached on the Tracer UC400 controller itself. The other portion of the connector
is either a screw terminal (for field wiring) or a terminal housing (for factory wiring). Spare screw
terminals come factory installed for field mounted wired zone sensors and common accessories.
Wireless Zone Sensors
The Tracer UC400 controller is compatible with the latest wireless zone sensors available from
Trane. Wireless zone sensors provide flexibility of sensor location and re-location as well as
reducing the cost of installation. Wireless zone sensor receivers are available as a factory installed
option.