Trane Tracer UC400 User manual

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.
132
© 2020 Trane
45
Installation Instructions
Tracer® UC400 Pre-programmed for
RTU or Heat Pumps
Order Numbers: BMUC400ABA0100011
X39641254-01
Warnings, Cautions, and Notices
Read this manual thoroughly before operating or servicing this unit. 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.
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.
CAUTION Indicates a potentially hazardous situation which,
if not avoided, could result in minor or moderate
injury. It could also be used to alert against unsafe
NOTICE Indicates a situation that could result in
equipment or property-damage only accidents.
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 such
as HCFCs and HFCs.
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.
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 electrical codes.
WARNING
Personal Protective Equipment Required!
Installing/servicing this unit could result in exposure to electrical, mechanical
and chemical hazards. Before installing/servicing this unit, technicians MUST
put on all Personal Protective Equipment (PPE) recommended for the work
being undertaken. ALWAYS refer to appropriate SDS sheets and OSHA
guidelines for proper PPE. When working with or around hazardous chemicals,
ALWAYS refer to the appropriate SDS sheets and OSHA guidelines for
information on allowable personal exposure levels, proper respiratory
protection and handling recommendations. If there is a risk of arc or flash,
technicians MUST put on all necessary Personal Protective Equipment (PPE) in
accordance with NFPA70E for arc/flash protection PRIOR to servicing the unit.
Failure to follow recommendations could result in death or serious injury.
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.
June 2020 BAS-SVN099E-EN
Storage/Operating Specifications
Storage
Temperature: -48°F to 203°F (-44°C to 95°C)
Relative
Humidity: Between 5% to 95% (non-condensing)
Operating
Temperature: -40°F to 158°F (-40°C to 70°C)
Humidity: Between 5% to 95% (non-condensing)
Power: 20.4–27.6 Vac (24 Vac, ±15% nominal) 50–60 Hz, 24 VA
(24 VA plus binary output loads for a maximum of 12 VA for each binary output)
Mounting Weight
of Controller: Mounting surface must support 0.80 lb. (0.364 kg)
Environmental
Rating
(Enclosure): NEMA 1
Altitude,
Installation,
Pollution: 9,842 ft (3,000 m), U.L. 840; Category 3, U.L. 840; Degree 2
5.65 in. (143.5 mm)
*(8 units)
2.37 in.
(60.1 mm)
1.89 in.
(48 mm)
4.00 in.
(101.6 mm)
End View
Front View
1.79 in.
(45.4 mm)
To mount device:
1. Hook device
over top of DIN
rail.
2. Gently push
on lower half
of device in the
direction of
arrow until the
release clip
clicks into
place.
To remove/reposition device:
1. Disconnect all connectors before
removing or repositioning.
2. Insert screwdriver into slotted release
clip and gently pry upward with the
screwdriver to disengage the clip.
3. While holding tension on the clip, lift
device upward to remove or reposition.
4. If repositioned, push on the device until
the release clip clicks back into place to
secure the device on the DIN rail.
Slotted release clip
shown from back side
NOTICE
Equipment Damage!
Do not use excessive force to install the controller on the DIN rail. Excessive force could result
in damage to the plastic enclosure. If using another manufacturer’s DIN rail, follow their
recommended installation.
WARNING
Equipment Damage!
Disconnect all electric power, including remote disconnects, before servicing. Follow proper
lockout/tag out procedures to ensure the power cannot be inadvertently energized. Failure to
disconnect power before servicing could result in serious injury or death.
CAUTION
Personal Injury and Equipment Damage!
After installation, ensure to check that the 24 Vac transformer is grounded through the
controller. Failure to check could result in personal injury and/or damage to equipment.
Measure the voltage between chassis ground and any ground terminal on the UC400. Expected
result: Vac <4.0 volt.
Dimensions/Mounting/Removing the UC400 Communication Link Wiring
The TracerUC400 controller communicates with the building automation
system (BAS) and with other controller over a BACnet® MS\TP
communication link.
For instructions on BACnet MS\TP communication wiring, refer to the Unit
Controller Wiring For the Tracer SC System Controller Wiring Guide (BAS-
SVN03).Transformer Recommendations
A/C Power Wiring
Prior to connecting AC power to the controller:
• All wiring must comply with National Electrical Code™ (NEC) and local codes.
• The recommended wire for AC power is 16 AWG copper wire, minimum.
• Refer to the section for Transformer Recommendations.
NOTICE
Equipment Damage!
Do not use excessive force to install the controller on the DIN rail. Excessive force could result
in damage to the plastic enclosure. If using another manufacturer’s DIN rail, follow their
recommended installation.
WARNING
Equipment Damage!
Disconnect all electric power, including remote disconnects, before servicing. Follow proper
lockout/tag out procedures to ensure the power cannot be inadvertently energized. Failure to
disconnect power before servicing could result in serious injury or death.
CAUTION
Personal Injury and Equipment Damage!
After installation, ensure to check that the 24 Vac transformer is grounded through the
controller. Failure to check could result in personal injury and/or damage to equipment.
Measure the voltage between chassis ground and any ground terminal on the UC400. Expected
result: Vac <4.0 volt.
Wiring Requirements
To ensure proper operation of the UC400, install the power supply circuit in accordance
with the following guidelines:
• The UC400 must receive AC power from a dedicated power circuit; failure to comply may cause the
controller to malfunction.
• A dedicated power circuit disconnect switch must be near the controller, easily accessible by the
operator, and marked as the disconnecting device for the controller.
•DONOT run AC power wires in the same wire bundle with input/output wires; failure to comply may
cause the controller to malfunction due to electrical noise.
18 AWG copper wire is recommended for the circuit between the transformer and the UC400.
Transformer Recommendations
The UC400 can be powered with 24 Vac. Use of a 24 Vac power supply is recommended
in order to use the spare 24 Vac outputs for powering relays and TRIACs.
• AC transformer requirements: UL listed, Class 2 power transformer, 24 Vac ±15%, device max load
24 VA, BCI application 6 VA. The transformer must be sized to provide adequate power to the UC400
controller (12 VA) and outputs (maximum 12 VA per binary output).
• CE-compliant installations: The transformer must be CE marked and SELV compliant per IEC
standards.
A separate transformer is recommended for each UC400. The line input to the transformer
must be equipped with a circuit breaker sized to handle the maximum transformer line
current. If a single transformer is shared by multiple UC400s:
• The transformer must have sufficient capacity
• Polarity must be maintained for every UC400 powered by the transformer
Important: If a technician inadvertently reverses polarity between controllers powered by the
same transformer, a difference of 24 Vac will occur between the grounds of each
controller. The following symptoms could result:
•Partial or full loss of communication on the entire BACnet MS/TP link
•Improper function of UC400 outputs
•Damage to the transformer or a blown transformer fuse
NOTICE
Equipment Damage!
Sharing 24 Vac power between controllers could result in equipment damage.
The Tracer UC400 controller is a field-installed device that provides direct
digital zone temperature control. It can operate as a stand-alone device or
as part of a building automation system (BAS) and control:
• 0/1/2-heat plus 0/1/2-cool rooftop unit
• heat pump; 0/1/2 compressor plus auxiliary heat (optional)
Visually inspect contents for obvious defects or damage. All components
have been thoroughly inspected before leaving the factory. Any claims for
damage incurred during shipment should be filed immediately with the
carrier.

©2020 Trane
Trane has a policy of continuous product and product data improvement and reserves the
right to change design and specifications without notice. We are committed to using
environmentally conscious print practices.
Trane - by Trane Technologies (NYSE: TT), a global climate innovator - creates
comfortable, energy efficient indoor environments for commercial and residential
applications. For more information, please visit trane.com or tranetechnologies.com.
67
BAS-SVN099E-EN 11 Jun 2020
Supersedes X39641254-01D (Mar 2017)
Wiring AC Power
1. Connect both secondary wires from the 24 Vac transformer to the XFMR terminals on the
device.
2. Ensure the device is properly grounded.
Important: This device must be grounded for proper operation! The factory-supplied ground
wire must be connected from any chassis ground connection on the device to an appropriate
earth ground ( ). The chassis ground connection used may be the 24 Vac transformer input
at the device, or any other chassis ground connection on the device.
Note: The device is not grounded through the DIN rail connection.
Startup and Power Check
1. Verify that the 24 Vac connector and the chassis ground are properly wired.
2. Each device must have a unique and valid address. The address is set either by using the rotary
address switches or, for Tracer SC applications, by using the Software Set Device ID function
in the Tracer TU service tool. Valid addresses are 001 through 127 for Tracer SC applications.
Important: A duplicate address or a 000 address will cause communication problems in
a BACnet link: The Tracer SC will not discover all devices on the link and the
installation process will fail after discovery.
3. Remove the lockout/tagout from the line voltage power to the electrical cabinet.
4. Apply power to the UC400 and observe the power check sequence that follows:
The power LED lights red for 1 second. Then it changes to green, indicating that the unit is
properly booted and ready for application code. Flashing red indicates that a fault conditions
exists. The Tracer TU service tool can be used to check for fault conditions after application
code and TGP2 programming have been loaded.
Input/Output Wiring
Pre-power checks of input/output devices should be performed according to the Tracer UC400 IOM
(BAS-SVX20). Maximum wire lengths are as follows:
NOTICE
Equipment Damage!
Remove power to the UC400 before making input/output connections. Failure to do so may cause
damage to the controller, power transformer, or input/output devices due to inadvertent
connections to power circuits.
Maximum Wire Lengths
Pre-power checks of input/output devices should be performed according to the Tracer
UC400 IOM (BAS-SVX20). Maximum wire lengths below.
Type Inputs Outputs
Binary 1,000 ft (300 m) 1,000 ft (300 m)
0–20 mA 1,000 ft (300 m) 1,000 ft (300 m)
0–10 Vdc 300 ft (100 m) 300 ft (100 m)
Thermistor/Resistive 300 ft (100 m) Not Applicable
• All wiring must be in accordance with the NEC and local codes.
• Use only 18–22 AWG (1.02 mm to 0.65 mm diameter), stranded, tinned-copper, shielded, twisted-
pair wire.
• Analog and 24 Vdc output wiring distances are dependent on the receiving unit specifications.
•DO
NOT run input/output wires or communication wires in the same wire bundle with AC power
wires.
Note: A pigtail connection should be
used between the chassis ground on the
device and an earth ground, if the device
is not grounded through one leg of the
transformer wiring.
Rotary
Address
Switches
24 Vac
Transformer
Marquee LED
Tug Test for Terminal Connectors
If using terminal connectors for wiring the UC400, strip the wires to expose 0.28 in (7 mm) of bare wire.
Insert each wire into a terminal connector and tighten the terminal screws. A tug test is recommended after
tightening terminal screws to ensure that all wires are secure. Torque reference: Tighten screw terminals
to 0.5–0.6 N·m (71–85 ozf/in or 4.4–5.3 lbf/in)
Note: N·m=Newton meter • ozf/in= ounce force per inch • lbf/in= pound force per inch
BACnet MS/TP Link Wiring
BACnet MS/TP link wiring must be field-supplied and installed in compliance with NEC and local codes. In
addition, the wire must be the following type: low capacitance, 18 gauge, stranded, tinned copper, shielded,
twisted pair. for more details, refer to the wiring guide for the Unit Controller Wiring for Tracer SC System
Controller, BAS-SVN03.
Important: Polarity must be maintained between all devices on the link.
Factory Defaults
The controller is shipped with the following default settings. To change defaults, use the Tracer TU service
tool or a BAS, as appropriate.
•Equipment Type: The Tracer UC400 ships from the factory configured to control a 2-heat/2-cool
rooftop unit. To change this configuration, refer to Table 2 below.
•Setpoints: In occupied mode, the controller can receive a setpoint from either a zone sensor or from
a BAS (default). The following are the default setpoints:
•Heating: 69.0°F (21.7°C)
•Cooling: 74.0°F (23.3°C)
In unoccupied mode, the controller will operate at:
•Heating: 66.0°F (15.6°C)
•Cooling: 78.0°F (29.4°C)
•Inputs and Outputs: Refer to the following tables for individual input and output factory defaults.
Table 1. Analog Inputs
Label Functions Defaults Rating
AI1 Zone Temperature Zone Temperature 10 k@ 77°F (25°C)AI4 Discharge Air Temp Discharge Air Temp
AI5 Outdoor Air Temp Outdoor Air Temp
AI2 Temperature Setpoint Zone Temp Setpoint 1 kpotentiometer
Note: For best results and accuracy, use only Trane temperature sensors.
Table 2. Binary Inputs
Label Functions Defaults Rating
BI1 Occupancy Occupancy Volt-free Dry Contact
BI2 Heat Pump Selection Input
Note: Do not apply power to these inputs. Connect jumper to BI2 for heat pump application.
Table 3. Binary Outputs
Label 2H/2C Heat Pump Rating
BO1 BO1 Supply Fan
• 10 A; up to 277 Vac
•1/3hp@125VacOR

1/2 hp @ 277
• 2 A; up to 125 Vac
• 8 A; up to 250 Vac OR

10 A; up to 30 Vac OR

10 A; up to 30 Vdc
BO4 Cool stage 1 (Y1) Compressor 1(Y1)
0.5 A - 12 VA@ 24 VAC
(UC400 BO4 Rating)
BO5 Cool stage 2 (Y2) Compressor 2 (Y2)
BO6 Heat stage 1 (W1)NotUsed
BO7 Heat stage 2 (W2)Notused
BO8 Not Used Reversing Valve
Output
BO9 Not Used Auxiliary Heat
Command
Agency Listings and Compliance
The European Union (EU) Declaration of Conformity is
available from your local Trane®office.