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.
1
32
© 2020 Trane
4
5
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 no
t avoided, could result in death or serious
injury.
CAUTION
Indicates a potentially hazardous situation which,
if no
t 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
equip
ment or property-damage only accidents.
Important Environmental Concerns
Scientific research has shown that certain man-ma
de 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
env
ir
onment, 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
Saf
ety (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.
•DO NOT 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.
To Next Page
Need help?
General
