BCXC-SVX01A-EN
27
Pre-Startup
Requirements
Installation
Communication Wiring
Units with Tracer ZN510 or ZN520 Only
Note: Communication link wiring is a
shielded, twisted pair of wire and must
comply with applicable electrical codes.
Follow these general guidelines when
installing communication wiring on units
with either a Tracer ZN510 or ZN520
controller:
• Maintain a maximum 5000 ft.
aggregate run
• Install all communication wiring in
accordance with the NEC and all local
codes.
• 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.
Service Communication Wiring
Establish service communication using
Rover™ service software connected to
the Tracer ZN
controller using a twisted
wire pair to one of the following
connection points:
• Remote zone sensor module
• Connections on the board
This allows the technician to view and
edit the Tracer controller configuration
and troubleshoot the unit.
Note: Unit control options and field-
wiring practices may limit the
controller’s communication ability.
Route interconnecting wiring from the
Tracer
controller to provide service
communication at the wall-mounted zone
sensor module. Install wiring by referenc-
ing the unit wiring diagram and Table I-
ER-1 on page 20 for appropriate wire
sizes. After wiring is complete, connect
the communication cable (provided with
the Rover service tool) to the telephone
style RJ11 connection on the zone sensor
module. Attach the other end of the cable
to a computer running Trane Rover
software to communicate.
Zone Sensors Without Interconnecting
Wiring
Establish service communication to the
Tracer
ZN controller by wiring directly to
the board inside the control box. Refer to
the unit-wiring diagram for appropriate
communication terminals on the board.
Once wiring is complete, Use Trane
Rover™ software to communicate to the
Tracer ZN controller.
Unit Startup
Refer to the Trane publication,
CNT-
SVX04A-EN Installation Operation and
Programming Guide, to operate the
Tracer ZN controller with Trane Integrated
Comfort™ System (ICS). The factory pre-
programs the Tracer
ZN controller with
default values to control the temperature
and unit airflow. Use Tracer Summit
®
building automation system or Rover™
software to change the default values.
Follow the procedure below to operate
the Tracer ZN controller in a stand-alone
operation:
1. Turn power on at the disconnect switch
option.
2. Position the fan mode switch to either
high, 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:
1. Room temperature should be greater
than 55°F and less than 85°F.
2. For a two-pipe 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.
4. Select the correct temperature
setpoint.
Note: Select and enable zone sensor
temperature settings to prevent freeze
damage to unit.
Tracer
®
Communications
Tracer ZN controllers have Comm5
communication ports. Typically, 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 Comm5 communication links.
The controller provides six 0.25-inch
quick-connect terminals for the Comm5
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
Each controller has its own unique
address or I.D. number on a Neuron chip.
Setting dip switches are not required on
the Tracer controller.
Tracer Summit
™
Communication Wiring
For Tracer ZN controlled units that will
interface with the Trane Tracer Summit
®
building management system, terminate
the communication wiring in the control
box at the designated terminals on the
board. Reference the unit wiring diagram
or submittals.
Ground shields at each Tracer ZN
controller, taping the opposite end of
each shield to prevent any connection
between the shield and anther ground.
Refer to Trane publication,
CNT-SVX04A-
EN Installation, Operation and Program-
ming Guide, for the communication
wiring diagram.
Communication wire must conform to
the following specification:
• Shielded twisted pair 18 AWG
• Capacitance 23 (21-25) picofarads (pF)
per foot
• Listing/Rating – 300V 150C NEC 725-2
(b) Class 2 Type CL2P
• Trane Part No. 400-20-28 or equivalent,
available through Trane BAS Buying
Group Accessories catalog. Tracer
Summit
®
Communication Wiring
