Installation - Controls; Tracer® Uc400-B Controller; Communication Wire Specifications; General Wiring Guidelines - Trane FCV Installation, Operation And Maintenance Manual

Installation - Controls

®
Tracer UC400-B Controller
®
The Tracer UC400-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, Tracer
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 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
pair communication wire, requiring no additional
interface device (i.e., a command unit). The Tracer
control system can monitor or override Tracer
control points.This includes such points as temperature
and output positions.
Note: For more detailed information, refer to:
• BAS-SVX20*-EN Tracer
Controller Installation, Operation, and Maintenance
manual

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
Controller (BAS-SVN03D-EN, or the most recent
revision).
UNT-SVX041D-EN
®
UC400-B
®
SC via a twisted
®
®
UC400-B
®
UC400-B Programmable
®
SC System

General Wiring Guidelines

Figure 33. Connecting wires to terminal
®
To connect wires to the UC400-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.
3. Tighten the terminal screw to 0.5 to 0.6 Nm (71 to
85 ozf-in or 4.4 to 5.3 lbf-in.).
4. Tug on the wires after tightening the screws to ensure
all wires are secure as shown on the right.

Setting the Address

The rotary address dials on the UC400-B controller serve
one or two purposes depending upon the network: they
are always used for the MAC Address, which is sometimes
all or part of the BACnet Device ID.
Use a 1/8 inch (3.2 mm) flathead screwdriver to set rotary
address dials. Dials rotate in either direction.
Figure 34. Setting rotary address dials
1 2 3 4 5 6
1 4 13 1 2 11 10 9 8 7 6 5 4
J1 6
P ho e nix
Co m m -
Ad d re s s
Co m m +
0 0 0 0
G ND
1 2 3
5 5 5 5
24VDC
J1 4 - J S T
1 2 3
3 2 1
J1 7 J1 8
P ho e nix
1 4 Pin AMP
Low Coil
Enterin g
Detection
Water
( NC )
Tem p
Condensate
Over ow ( NC )
Comm In
Comm Out
Zone Sensor
Serv Tool
Connection
Auxiliar y 24 V dc
Out p ut
4
47