Trane Technologies V-Traq BAYTRAQ001 Series User manual

October 2021 ACC-SVN256A-EN
SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of
heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training.
Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury.
When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are
attached to the equipment.
V-Traq™ Field Installed Kit
Precedent™ Packaged Rooftop HVAC Units
Installation Instructions
Model Used with:
BAYTRAQ001* Precedent BF Cabinet
BAYTRAQ002* Precedent CDE Cabinet

©2021 Trane ACC-SVN256A-EN
Introduction
Read this manual thoroughly before operating or servicing
this unit.
Warnings, Cautions, and Notices
Safety advisories appear throughout this manual as
required. Your personal safety and the proper operation of
this machine depend upon the strict observance of these
precautions.
Important Environmental Concerns
Scientific research has shown that certain man-made
chemicals can affect the earth’s naturally occurring
stratospheric ozone layer when released to the
atmosphere. In particular, several of the identified
chemicals that may affect the ozone layer are refrigerants
that contain Chlorine, Fluorine and Carbon (CFCs) and
those containing Hydrogen, Chlorine, Fluorine and
Carbon (HCFCs). Not all refrigerants containing these
compounds have the same potential impact to the
environment. Trane advocates the responsible handling of
all refrigerants-including industry replacements for CFCs
and HCFCs such as saturated or unsaturated HFCs and
HCFCs.
Important Responsible Refrigerant
Practices
Trane believes that responsible refrigerant practices are
important to the environment, our customers, and the air
conditioning industry. All technicians who handle
refrigerants must be certified according to local rules. For
the USA, the Federal Clean Air Act (Section 608) sets forth
the requirements for handling, reclaiming, recovering and
recycling of certain refrigerants and the equipment that is
used in these service procedures. In addition, some states
or municipalities may have additional requirements that
must also be adhered to for responsible management of
refrigerants. Know the applicable laws and follow them.
The three types of advisories are defined as follows:
WARNING Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTIONsIndicates a potentially hazardous
situation which, if not avoided, could
result in minor or moderate injury. It
could also be used to alert against
unsafe practices.
NOTICE Indicates a situation that could result in
equipment or property-damage only
accidents.
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury. All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state/national electrical codes.
WARNING
Personal Protective Equipment (PPE)
Required!
Failure to wear proper PPE for the job being undertaken
could result in death or serious injury. Technicians, in
order to protect themselves from potential electrical,
mechanical, and chemical hazards, MUST follow
precautions in this manual and on the tags, stickers,
and labels, as well as the instructions below:
• Before installing/servicing this unit, technicians
MUST put on all PPE required for the work being
undertaken (Examples; cut resistant gloves/sleeves,
butyl gloves, safety glasses, hard hat/bump cap, fall
protection, electrical PPE and arc flash clothing).
ALWAYS refer to appropriate Safety Data Sheets
(SDS) and OSHA guidelines for proper PPE.
• When working with or around hazardous chemicals,
ALWAYS refer to the appropriate SDS and OSHA/
GHS (Global Harmonized System of Classification
and Labeling of Chemicals) guidelines for
information on allowable personal exposure levels,
proper respiratory protection and handling
instructions.
• If there is a risk of energized electrical contact, arc, or
flash, technicians MUST put on all PPE in accordance
with OSHA, NFPA 70E, or other country-specific
requirements for arc flash protection, PRIOR to
servicing the unit. NEVER PERFORM ANY
SWITCHING, DISCONNECTING, OR VOLTAGE
TESTING WITHOUT PROPER ELECTRICAL PPE AND
ARC FLASH CLOTHING. ENSURE ELECTRICAL
METERS AND EQUIPMENT ARE PROPERLY RATED
FOR INTENDED VOLTAGE.

Introduction
ACC-SVN256A-EN 3
Copyright
This document and the information in it are the property of
Trane, and may not be used or reproduced in whole or in
part without written permission. Trane reserves the right
to revise this publication at any time, and to make changes
to its content without obligation to notify any person of
such revision or change.
Trademarks
All trademarks referenced in this document are the
trademarks of their respective owners.
WARNING
Follow EHS Policies!
Failure to follow instructions below could result in
death or serious injury.
• All Trane personnel must follow the company’s
Environmental, Health and Safety (EHS) policies
when performing work such as hot work, electrical,
fall protection, lockout/tagout, refrigerant handling,
etc. Where local regulations are more stringent than
these policies, those regulations supersede these
policies.
• Non-Trane personnel should always follow local
regulations.
WARNING
Hazardous Service Procedures!
Failure to follow all precautions in this manual and on
the tags, stickers, and labels could result in death or
serious injury.
Technicians, in order to protect themselves from
potential electrical, mechanical, and chemical hazards,
MUST follow precautions in this manual and on the
tags, stickers, and labels, as well as the following
instructions: Unless specified otherwise, disconnect all
electrical power including remote disconnect and
discharge all energy storing devices such as capacitors
before servicing. Follow proper lockout/tagout
procedures to ensure the power can not be
inadvertently energized.When necessary to work with
live electrical components, have a qualified licensed
electrician or other individual who has been trained in
handling live electrical components perform these
tasks.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is present
with a voltmeter.

4ACC-SVN256A-EN
Table of Contents
General Information . . . . . . . . . . . . . . . . . . . . . 5
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Receipt of Kit . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Precedent Cabinet with Low Leak Economizer
(BAYTRAQ001A) . . . . . . . . . . . . . . . . . . . . . . . 6
Precedent Cabinet with Low Leak Economizer
(BAYTRAQ002A) . . . . . . . . . . . . . . . . . . . . . . . 8
Verify System Operation . . . . . . . . . . . . . . . . 10
UC400 Application Notes . . . . . . . . . . . . . . 10
System Tuning Notes
(if necessary) . . . . . . . . . . . . . . . . . . . . . . . . . 10
Field Operational Check . . . . . . . . . . . . . . . 10
BACnet Notes . . . . . . . . . . . . . . . . . . . . . . . . 10
Object Data Points List (UC400) . . . . . . . . . 11

ACC-SVN256A-EN 5
General Information
This document gives detailed instructions for installing a
Traq Outdoor Air Monitoring assembly and controls in
Precedent units equipped with the factory Low Leak
Damper Economizer option. For startup notes, see “Verify
System Operation,” p. 10.
The Traq field installation instructions are categorized by
Precedent cabinet size. See “Installation,” p. 6 to identify
which instructions pertain to this kit. Note that these
instructions assume the Low-Leak Economizer section has
already been installed. If the low leak section has not been
installed, do so before starting this process.
The parts listed below are common to all Traq kits:
Parts List
• 5x Assorted wiring harnesses
• 1x Traq Assembly
• 1x Bullet sensor
• 1x Control relay
• 1x Relay base
• 1x DIN rail
• 1x UC400 controller
• 1x Field install wiring diagram
• 2x Special unit label stickers
• 1x Sticker field install wiring diagram
• 1x 24VAC control transformer
• 12x sheet metal screws
Receipt of Kit
Inspect the kit components for damage. Check internal
components for damage. If inspection reveals damage or
material shortages, file a claim with the shipper
immediately. Specify the type and extent of the shipping
damage on the “bill of lading” before signing. It is the
responsibility of the purchasing contractor to file the
freight claim; failure to do so makes the purchaser
financially responsible for shipping damage.
Do not install a damaged unit without approval from the
appropriate Trane sales representative.

6ACC-SVN256A-EN
Installation
Precedent Cabinet with Low Leak
Economizer (BAYTRAQ001A)
The Traq airflow measurement system should be installed
according to the following steps:
1. Remove the outdoor air hood of the unit to gain access
to the section behind, once the panels are removed,
the low leak economizer dampers should be visible.
Figure 1 below highlights the screws to be removed,
and the panels that need to be removed.
2. Once the Outdoor Air panel has been removed from
the end of the unit, the low leak damper section should
be visible, like shown in Figure 2. Keep the screws from
the removed panel, along with the removed panels,
they will be replaced later during install.
3. With the outdoor air panels removed, mark and drill
the following holes using a 0.125-inch drill bit, using
the top and right edges as reference points, as shown
in Figure 3. The top right hole is to be 5.75-inch left
from the right edge of the panel, and down 3.50-inch
from the top edge of the panel. Each hole from the top
will be spread 3.50-inch between each other.
4. Once the holes have been drilled shown in Figure 3,
have one technician hold the Traq assembly in place,
while the other technician screws the assembly in
place using the (3) screw holes from Figure 3 and the
provided sheet metal screws.
Ensure the Traq assembly is installed behind the lower
support panel as shown in Figure 4. An indication that
the panel is installed correctly is that the screw holes at
the bottom of the assembly line up with the holes of the
lower support panel.
5. With one technician holding the assembly, have the
other technician secure the fixture inplace by replacing
the bottom (5) screws using the holes that were lined
up in Figure 4.
Note: The pneumatic tubing is not shown.
Figure 1. OA panel at end of unit
Figure 2. End of unit with OA hood removed
Panels
to Remove Screw
Locations
Duplicated
on
Opposite
Side
Figure 3. Dimensions of hole locations
Figure 4. Traq assembly in place before being secured
Screws
from
Step 4
Lower
Support
panel
Lined up
Assembly
Holes

Installation
ACC-SVN256A-EN 7
6. By this point, the assembly should be structurally
sound enough to no longer require support from the
second technician.
7. Install the UC400 assembly, which has been pre-
mounted on DIN rail in the main control panel. Also
mount the provided control transformer, CST-T1.
8. Remove the panel on the right side that exposes the
return air section, the panel is shown in Figure 5.
9. Mount the VCM Flange in the bottom of the return air
section using the pre-drilled screw holes and the
provided drill screws. The VCM flange should be
oriented as shown in Figure 6.
10. Once the VCM flange is mounted, mount the VCM
using the provided sheet metal screws.
11. Use the provided wire whips to wire the RTEM,
transformer, and UC400 control module according to
the provided wiring diagram. Follow the same wire
routing as the factory wiring. Figure 6 shows the open
RA section.
12. Connect the provided air tubing between the Traq
assembly and the VCM control module. Be sure to
match the high and low connections on the Traq
assembly with the high and low connections on the
VCM, the high and low connections are shown in
Figure 7.
Note: The pneumatic tubing is not shown.
13. Once the RTEM and VCM have been wired, replace the
panel that was removed in Step 8.
14. Reinstall the OA panel that was removed in Step 1,
replacing all factory screws.
15. The screw holes should line up on the left side of the
OA hood such that when the (3) screws are replaced,
they will go through both the Traq assembly, and the
original backside panel.
The completed unit should appear as shown in
Figure 1.
Figure 5. Panel to remove
Figure 6. VCM flange
Return Air
Section Panel
VCM Flange
Figure 7. High and low pneumatic tubing port
locations
High
Low

Installation
8ACC-SVN256A-EN
Precedent Cabinet with Low Leak
Economizer (BAYTRAQ002A)
The Traq airflow measurement system should be installed
according to the following steps:
1. Remove the outdoor air hood of the unit to gain access
to the section behind, once the panels are removed,
the low leak economizer dampers should be visible.
Figure 8 highlights the screws to be removed, and the
panels that need to be removed.
2. Once the OA panel has been removed from the end of
the unit, the low leak damper section should be visible,
like in Figure 9. Keep the screws from the removed
panel, along with the removed panels, they will be
replaced later during install.
3. With the outdoor air panels removed, mark and drill
the following holes using a 0.125-inch drill bit, using
the top and right edges as reference points, as shown
in Figure 10. The top right hole is to be 5.75 inches left
from the right edge of the panel, and down 4.5 inches
from the top edge of the panel. Each hole from the top
will be spread 4.5 inches between each other.
4. Once the holes have been drilled like in Figure 10, have
one technician hold the Traq assembly in place, while
the other technician screws the assembly in place
using the (2) screw holes from Figure 10 and the
provided sheet metal screws.
Ensure the Traq assembly is installed behind the lower
support panel as shown in Figure 11. An indication that
the panel is installed correctly is that the screw holes at
the bottom of the assembly line up with the holes of the
lower support panel.
5. With one technician holding the assembly, have the
other technician secure the fixture inplace by replacing
the bottom (5) screws using the holes that were lined
up in Figure 11.
Note: The pneumatic tubing is not shown.
Figure 8. OA panel at end of unit
Figure 9. End of unit with OA hood removed
Panels
to Remove
Screw
Locations
Duplicated
on
Opposite
Side
Figure 10. Dimensions of hole locations
Figure 11. Traq assembly in place before being secured
Lined up
Assembly
Holes
Screws
from
Step 4
Lower
Panel
Support

Installation
ACC-SVN256A-EN 9
6. By this point, the assembly should be structurally
sound enough to no longer require support from the
second technician.
7. Install the UC400 assembly, which has been pre-
mounted on DIN rail in the main control panel. Mount
the provided control transformer, CST-T1.
8. Remove the panel on the right side that exposes the
return air section, the panel is shown in Figure 12.
9. Mount the VCM Flange in the bottom of the return air
section using the pre-drilled screw holes and the
provided drill screws. The VCM flange should be
oriented as in Figure 13.
10. Once the VCM flange is mounted, mount the VCM
using the provided sheet metal screws.
11. Use the provided wire whips to wire the RTEM,
transformer, and UC400 control module according to
the provided wiring diagram. Follow the same wire
routing as the factory wiring. Figure 13 shows the open
RA section.
12. Connect the provided air tubing between the Traq
assembly and the VCM control module. Be sure to
match the high and low connections on the Traq
assembly with the high and low connections on the
VCM, the high and low connections are shown in
Figure 14.
Note: The pneumatic tubing is not shown.
13. Once the RTEM and VCM have been wired, replace the
panel that was removed in Step 8.
14. Reinstall the OA panel that was removed in Step 1,
replacing all factory screws.
15. The screw holes should line up on the left side of the
OA hood such that when the (3) screws are replaced, (2)
of the screws will go through both the Traq assembly,
and the original backside panel, with the top screw will
not go through the Traq assembly.
The completed unit should look as it did in Figure 8.
Figure 12. Panel to remove
Figure 13. VCM flange
Return Air
Section Panel
VCM Flange
Figure 14. High and low pneumatic tubing port
locations
High
Low

10 ACC-SVN256A-EN
Verify System Operation
UC400 Application Notes
• This unit is factory equipped with the Traq outside air
monitoring system. This system is capable of metering
the flow of outside air through the economizer.
• The economizer dampers are modulated to maintain a
minimum outside airflow into the building for
ventilation purposes. This set point may be adjusted
using the Tracer TU Software or communicated via
BACnet. The default set point is 0 CFM. Without
changing this set point, the economizer will only open
based on the standard Reliatel cooling and ventilation
algorithms.
• The Traq system will modulate the outside air damper
to maintain minimum outside airflow any time the
supply fan is proven ON.
• If the unit cooling or CO2purge algorithm requests an
economizer position greater than that which is
required for ventilation, Traq will increase the damper
position to satisfy zone requirements.
Note: This unit has a Trane programmable
microcontroller. The controller contains setpoints
and PID loops that could require adjusting/tuning
during startup.
System Tuning Notes
(if necessary)
In order to properly tune this system, adjust Analog Values
7 and/or 8, “Airflow Correction Factor” and “Min CFM Calc
P-Gain” by connecting to the UC400 through Tracer TU.
• Increasing the P-Gain value will increase the response
time of the calculation for the damper position (this
helps if damper is not responding to airflow changes
quickly enough).
• Decreasing the P-Gain slows down the response time
of the calculation for the damper position (this helps if
the damper is fluctuating too quickly and over shooting
the setpoint).
• The Airflow Correction factor can be adjusted if the
airflow calculation (Analog Value 3) seems to be off
from the measuring value. Adjust the value higher
than 1 if the measured airflow is consistently higher
than what is being calculated. Adjust the value lower
than 1 if the measured airflow is consistently lower
than what is being calculated.
Field Operational Check
1. Verify that in no-power state, the outside air dampers
are held closed and the return air damper is held open
by the actuator spring return.
2. Cycle the unit into economizer test mode. Note that
certain outside air conditions may prevent the Reliatel
cooling algorithm from opening the economizer
dampers. A 10 VDC signal may be applied to the
damper actuator to verify proper direction of
operation.
3. Verify that outside air dampers open and return
damper closes in response to the Reliatel cooling
request.
4. Tracer TU may be used to read “measured cfm” value
on the UC400 controller to verify that the correct CFM
is being read.
BACnet Notes
The following network variables are used to communicate
with the Traq system via BACnet:
Note: In some cases the Traq air monitoring system will
override the Reliatel damper position to maintain
minimum ventilation set point. If damper position
is to be read over a BACnet network, actual damper
position should be read from analog value Min OA
CFM Position.
Table 1. Network variables
Function Value Name
Active Damper Position Damper Position
Measured Outside Air CFM OA CFM - Measured
Outside Air Set Point Minimum OA CFM Setpoint

Verify System Operation
ACC-SVN256A-EN 11
Object Data Points List (UC400)
Table 2. Object data points
Instance Object Name Point Reference Read/Write Description
Analog Inputs
1 Outdoor Air Velocity UI1.analogValue Read
2 Reliatel Economizer Signal UI2.analogValue Read
Analog Outputs
1 Outdoor Air Damper AO1.analogValue Read 2-10 VDC Output
Analog Values
1 Minimum Outdoor Air CFM Setpoint Read/Write Default Setpoint: 0 cfm, Range: 0-
20,000 cfm
2 Outdoor Air Damper Position Read
3 Outdoor Air CFM Measured Read
4 Minimum Outdoor Air CFM Position Read
5 Damper Diameter Read Default: 13
6 Damper Count Read Default: 3
7 Airflow Correction Factor Read/Write Default: 1, Range: 0-10000
8 Min CFM Calc P-Gain Read/Write Default: 1, Range: 0-1000
Binary Inputs
1 Supply Fan Status BI1.binaryValue Read
Multistate Values
1 Emergency Override Command bacnet.1.point.mo.2.value Read
1: Normal
2: Pressurize
3: Depressurize
4: Purge
5: Shutdown
6: Fire

©2021
Trane and American Standard have a policy of continuous product and product data improvement and reserve the right to change design and
specifications without notice. We are committed to using environmentally conscious print practices.
Trane and American Standard create comfortable, energy efficient indoor environments for commercial
and residential applications. For more information, please visit trane.com or americanstandardair.com.
ACC-SVN256A-EN 06 Oct 2021
(NEW)