Uc400-B/Symbio™ 400-B Controller - Trane VUV Installation, Operation And Maintenance Manual

Start-Up
configuration default fan speeds for heating and cooling,
unless the controller receives a communicated fan input.
When the fan switch is in the off position, the controller does
not control any unit capacity. The unit remains powered and all
outputs drive to the closed position. Upon a loss of signal on
the fan speed input, the controller reports a diagnostic and
reverts to using the default fan speed.
On/Cancel Buttons
Momentarily pressing the on button during unoccupied mode
places the controller in occupied bypass mode for
120 minutes. You can adjust the number of minutes in the unit
controller configuration using Rover service tool. The
controller remains in occupied bypass mode until the override
time expires or until you press the Cancel button.
Communication Jack
Use the RJ-11 communication as the connection point from
Rover service tool to the communication link—when the
communication jack is wired to the communication link at the
controller. By accessing the communication jack via Rover,
you can access any controller on the link.
Communications
The controller communicates via LonTalk
a communication link is applied between unit controllers and a
building automation system. Communication also is possible
via Rover, Trane's service tool. Peer-to-peer communication
across controllers is possible even when a building automation
system is not present. You do not need to observe polarity for
®
LonTalk communication links.
The controller provides six 0.25-inch quick-connect terminals
®
for the LonTalk communication link connections, as follows:
• Two terminals for communication to the board
• Two terminals for communication from the board to the
next unit (daisy chain)
• Two terminals for a connection from the zone sensor back
to the controller
Table 32. Zone sensor wiring connections
TB1
1 Space temperature / timed override detection
2
3
4
5
6
82
®
protocol. Typically,
Description
Common
Setpoint
Fan mode
Communications
Communications
UC400-B/Symbio™ 400-B
Controller
Tracer® UC400-B controller delivers single zone VAV control
in a stand-alone operation or as part of a building automation
®
system using BACnet communications.
The Symbio™ 400/Symbio™ 400-B is a multi-purpose,
programmable (or application-specific) controller that provides
direct-digital zone temperature control. The controller can
operate as a stand-alone device or as part of a building
automation system (BAS). Communication between the
controller and a BAS occurs on an open standard with inter-
operable protocols used in Building Automation and Control
Networks (BACnet®). Programming is done by means of the
Tracer® TU service tool. The Symbio™ 400-B is designed as
a one-to-one replacement for UC400-B.
UC400-B/Symbio™ 400-B Stand-Alone
Operation
The factory pre-programs the UC400-B/Symbio™ 400-B with
default values to control the temperature and unit airflow. Use
Tracer® SC building automation system or Tracer® TU
software to change the default values. For more information,
refer to:
• BAS-SVX48*-EN: Tracer® UC400/UC400-B
Programmable Controllers for Blower Coil, Fan Coil, and
Unit Ventilator Installation, Operation, and Maintenance
• BAS-SVX093*-EN: Symbio™ 400-B/500 Programmable
Controllers For Blower Coil, Fan Coil, and Unit Ventilator
Installation, Operation, and Maintenance
Follow the procedure below to operate the UC400-B/Symbio™
400-B in a stand-alone operation:
1. Turn power on at the disconnect switch option.
2. Position the fan mode switch to either high, medium, low,
or the auto position.
3. Rotate the setpoint dial on the zone sensor module to 55°F
for cooling or 85°F for heating.
The appropriate control valve will actuate assuming the
following conditions:
• Room temperature should be greater than 55°F and less
than 85°F.
• For a 2-pipe fan-coil unit with an automatic changeover
sensor, the water temperature input is appropriate for the
demand placed on the unit. For example, cooling operation
is requested and cold water (5° lower than room
temperature) flows into the unit.
• Select the correct temperature setpoint.
Note: Select and enable zone sensor temperature settings to
prevent freeze damage to unit.
UV-SVX005G-EN