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Installation

18 VAV-SVN09B-EN

All binary outputs from control board are 24 VAC.

Connection points for unit UCM controller are shown in

Control Diagrams:

• Figure 44 and Figure 45 for the UCM 4.2

• Figure 46 and Figure 47 for the VV550

• Figure 48 and Figure 49 for the UC400

• Figure 50 and Figure 51 for the UC210

The type of wire used would be a Plenum rated class 2

circuit cable (CL2P) or approved substitute.The wire can

be 18t o 22 gauge and be used at a distance of up to 100 ft.

VRRF DDC controller Power Wiring

In VRRF unit connect line voltage wires to optional

transformer or Connect 24VAC toTB1-1 (+) andTB1-2 (-)

Proper polarity must be maintained.TB1-1 is the hot side

(+) andTB1-2 is the ground side (-) of the 24VAC input.The

UCM cannot be powered from a common 24 VAC

transformer that is supplying power to a device containing

a full wave rectifier bridge in its power supply. The

acceptable voltage is 20 to 28 VAC (24 VAC cataloged).

However, voltages at either extreme may result in

increased system instability.

Communication Link Wiring

UC400 and UC210

• Use 18 AWG Trane purple-shielded communication

wire for BACnet installations.

• Link limit of 4,000 ft and 60 devices maximum (without

a repeater).

• Use aTrane BACnet termination on each end of the

link.

• Use daisy chain topology (See Figure 9).

• Maintain polarity.

To ensure proper network communication, follow the

recommended wiring and best practices below when

installing communication wire:

• All wiring must comply with the National Electrical

Code™ (NEC) and local codes.

• Ensure that 24 Vac power supplies are consistent in

regards to grounding. Avoid sharing 24 Vac between

controllers.

• Avoid over tightening cable ties and other forms of

cable wraps.This can damage the wires inside the

cable.

• Do not run communication cable alongside or in the

same conduit as 24 Vac power.This includes the

conductors running fromTRIAC-type inputs.

• In open plenums, avoid running wire near lighting

ballasts, especially those using 277 Vac.

• Use same communication wire type, without

terminators, for the zone sensor communication stubs

from the UC400 controller IMC terminals to the zone

sensor communication module.

• Zone Sensor communication wiring length limits of

300 ft. (100 m).

Note: For more details, refer to the Unit ControllerWiring

for theTracer SC™ System ControllerWiring Guide

(BAS-SVN03).

Pneumatic units:

Single Duct Electric Heat

Remove Power and Lock andTag out unit if it hasn't been

done already.

1. Disconnect PE switch(es) for each stage of heat from

electric heat control enclosure and replace them with

relay(s) from kit.

2. Connect line voltage wires to relay(s) Normally Open

contacts using existing wires that were connected to

PE switch(es) if possible. See

Figure 10, p. 19 or

Figure 11 , p. 20 for correct diagram connections

3. Control voltage will be field wired from relay coil(s) to

VRRF DDC controller binary output connections using

cable. See Control Diagrams:

a. Figure 44 and Figure 45 for the UCM 4.2

b. Figure 46 and Figure 47 for the VV550

c. Figure 48 and Figure 49 for the UC400

d. Figure 50 and Figure 51 for the UC210

Figure 9. BACnet MS/TP link wiring

BI LINK IMC

VDC

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P P

LINK IM

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SERVICE TOOL

BI LINK IMC

VDC

AIAI AI AI

P P

LINK IM

SERVI

SERVICE TOOL

BI LINK IMC

VDC

AIAI AI AI

P P

LINK IM

SERVI

SERVICE TOOL

BI LINK IMC

VDC

AIAI AI AI

P P

LINK IM

SERVI

SERVICE TOOL

BI LINK IMC

VDC

AIAI AI AI

P P

LINK IM

SERVI

SERVICE TOOL

Tracer SC

UC400

Zone

Sensor

Zone

Sensor

Zone

Sensor

Zone

Sensor

communications

jack wiring

Trane BACnet terminator

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power can not be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

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