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

• Solder the conductors and insulate (tape) the joint
sufficiently when splicing communication wire. Do not use
wire nuts to make the splice.
• Do not pass communication wiring between buildings
because the unit will assume different ground potentials.
• Do not run power in the same conduit or wire bundle with
communication link wiring.
Note: You do not need to observe polarity for LonTalk
communication links.
Recommended Wiring Practices
The following guidelines should be followed while installing
communication wire.
®
• LonTalk is not polarity sensitive. Trane recommends that
the installer keep polarity consistent throughout the site.
• Only strip away two inches maximum of the outer
conductor of shielded cable.
• Make sure that the 24 Vac power supplies are consistent
in how they are grounded. Avoid sharing 24 Vac between
®
LonTalk UCMs.
• Avoid over-tightening cable ties and other forms of cable
wraps. A tight tie or wrap could damage the wires inside the
cable.
®
• Do not run LonTalk cable alongside or in the same conduit
as 24 Vac power.
• In an open plenum, avoid lighting ballasts, especially those
using 277 Vac.
• Do not use a trunk and branch configuration, if possible.
Trunk and branch configurations shorten the distance
cable can be run.
Device Addressing
®
LonTalk devices are given a unique address by the
manufacturer. This address is called a Neuron ID. Each
Tracer® ZN520 controller can be identified by its unique
Neuron ID, which is printed on a label on the controller's logic
board. The Neuron ID is also displayed when communication
is established using Tracer Summit® or Rover service tool.
The Neuron ID format is 00-01-64-1C-2B-00. Units with a
UC400-B or Symbio™ 400-B WCI controller can be addressed
in the factory. Check with the controls contractor for more
information.
UC400-B/Symbio™ 400-B
Controller
The UC400-B/Symbio™ 400-B single-zone VAV controller can
be used in a stand-alone application or as part of a Tracer®
control system.
In the stand-alone configuration, UC400-B/Symbio™ 400-B
receives operation commands from the zone sensor and/or the
entering water temperature sensor (on auto changeover
units).The reading from the entering water temperature sensor
and determines if the unit is capable of cooling or heating. The
UV-SVX005G-EN
zone sensor module is capable of transmitting the following
information to the controller:
• Timed override on/cancel request
• Zone setpoint
• Current zone temperature
• Fan mode selection (off-auto-high-med-low)
For optimal system performance, units can operate as part of
®
a Tracer® SC building automation system. The controller is
linked directly to the Tracer® SC via a twisted pair
communication wire, requiring no additional interface device
(i.e., a command unit). The Tracer® control system can
monitor or override UC400-B/Symbio™ 400-B control
points.This includes such points as temperature and output
positions.
Notes: For more detailed 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
Communication Wire Specifications
All wiring must comply with the National Electrical Code
(NEC™) and local electrical codes.
Field-supplied BACnet® MS/TP link wiring must be installed in
compliance with NEC and local codes. The wire must be low-
capacitance, 18-gauge, stranded, tinned-copper, shielded,
twisted-pair.
Note: For more details, refer to Wiring Guide: Unit Controller
Wiring for the Tracer® SC System Controller
(BAS-SVN03*-EN, or the most recent revision).
General Wiring Guidelines
Figure 31. Connecting wires to terminal
To connect wires to the UC400-B/Symbio™ 400-B controller or
the expansion modules:
1. Strip the wires to expose 0.28 inch (7 mm) of bare wire.
2. Insert the wire into a terminal connector.
Installation - Controls
35