Trane Tracer UC400 Installation and operating instructions

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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
April 2020 BBAASS--SSVVXX4488HH--EENN
Installation, Operation, and Maintenance
Tracer®UC400/UC400–B
Programmable Controllers
For Blower Coil, Fan Coil, and Unit Ventilator

©2020 Trane BAS-SVX48H-EN
Introduction
NNoottee:: Specific reference to either UC400 or UC400–B is made throughout this document. All
other content cited in this document about the UC400 is referred to as UUCC440000 CCoonnttrroolllleerr.
The UC400/UC400-B is a multi-purpose, programmable (or application-specific controller) that
provides direct-digital zone temperature control The controller can operate as a stand-alone
device or as part of a building automation system (BAS) Communication between the controller
and a BAS occurs on an open standard with inter-operable protocols used in Building
Automation and Control Networks (BACnet®) Programming is done by means of the Tracer® TU
service tool
This guide provides installation and configuration information for the UC400 Controller with
specific operation description for Blower Coil, Fan Coil, and Unit Ventilation
Refer to the Resource section for documentation related to concepts discussed throughout this
manual
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
Agency istings and Compliance
The European Union (EU) Declaration of Conformity is available from your local Trane® office
Revision History
Corrected Face/Bypass terminations in Figure 6, p 23 and Figure 12, p 29

BAS-SVX48H-EN 3
BACnet Protocol 6
BACnet® Testing Laboratory (BTL) Certification 6
Specifications and Dimensions 7
Device Connections 9
Additional Components 11
Water, Discharge, and Outdoor Air Temperature Sensors 11
Binary Input Switching Devices 11
Zone Temperature Sensors 11
Valve and Damper Actuators 12
Zone Humidity Sensor 12
CO2Sensor 12
Expansion Modules 12
Typical Applications and Terminations 13
Binary Inputs 14
BI1; Occupancy 14
BI2; Condensate Overflow 14
BI3; Low Coil Temp Detection 15
BI4; Frost Detection 15
BI5; Fan Status 15
Analog Inputs 15
Ground Terminals 15
AI1; Space Temperature 15
AI2; Space Temperature Local Setpoint 15
AI3; Local Fan Mode Input 16
AI4; Discharge Air Temperature Sensor 16
AI5; Entering Water Temperature 16
Universal Inputs 16
UI1; Relative Humidity or CO2Sensor 16
UI2; Outdoor Air Temperature 17
Binary Outputs 17
Override Outputs 17
Wiring Requirements 17
UC400 Wiring Diagrams 19
UC400–B Wiring Diagrams 25
Wiring Installation 31
Connecting Wires to Terminals 31
BACnet MS/TP Link 31
MAC Address 31
BACnet Device ID 31
Table of Contents

4BAS-SVX48H-EN
BACnet Networks, With or Without Tracer SC Controller 31
Without a Tracer SC Controller 31
With a Tracer SC Controller 31
BACnet MS/TP Link Wiring 32
Power Supply 33
Transformer Recommendations 33
Wiring Requirements 33
Connecting 24 Vac Secondary Wires 34
Power On Check 35
LED Description, Activities, and Troubleshooting 36
Sequence of Operation 39
Power-up Sequence 39
Random Start 39
Occupancy Modes 39
Occupied Mode 39
Unoccupied Mode 40
Occupied Standby Mode 40
Occupied Bypass Mode 40
Timed Override Control 40
Zone Temperature Control 40
Discharge Air Tempering 42
Heating or Cooling Mode 42
Auto-Changeover Entering Water Temperature Sampling Function 42
Fan Operation 43
Manual Fan Speed Control 43
Auto Fan Operation; 1–, 2–, 3–Speed 43
Single Zone VAV 43
Exhaust Control 44
Valve Operation 45
Modulating Valve Operation 45
3–Wire Floating Point Valve Calibration 45
2–Position Valve Operation 45
Face/Bypass Damper Operation 45
Modulating Outdoor/Return Air Damper 45
ASHRAE Cycle 1 Conformance 46
ASHRAE Cycle 2 Conformance 46
Economizing (Free Cooling) 47
Outdoor Air Damper Control With Varying Fan Speed 47
CO2-Based Demand Controlled Ventilation 48
Fan Operating at Multiple Speeds or Single-Zone VAV Control 48
DX Cooling Operation, 1 or 2 Circuits 49
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BAS-SVX48H-EN 5
Heat Pump Operation, 1 or 2 Circuits 50
Defrost Operation 50
Electric Heat Operation 50
Dehumidification Operation 50
Unit Protection Strategies 51
Smart Reset 51
Low Coil Temperature Protection 51
Condensate Overflow 51
Fan Status 51
Fan Off Delay 52
Filter Maintenance Timer 52
Freeze Avoidance 52
Freeze Protection, Discharge Air Temperature Low Limit 52
Output Testing 53
Diagnostics 53
Diagnostic Types 53
Diagnostic Generated by the UC400 54
Operational Causes and Diagnostics 57
Configuration and Maintenance 60
Settings for CO2-Based Demand Controlled Ventilation 63
Resources 67
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6BAS-SVX48H-EN
BACnet Protocol
The Building Automation and Control Network (BACnet®) protocol is ANSI/ASHRAE Standard
135 This standard allows building automation systems or components from different
manufacturers to share information and control functions BACnet® provides building owners
the capability to connect various types of building control systems or subsystems together for
many uses Multiple vendors can use this protocol to share information for monitoring and
supervisory control between systems and devices in a multi-vendor interconnected system The
BACnet® protocol defines standard objects (data points) called BACnet® objects Each object has
a defined list of properties that provide context information about that object In addition,
BACnet® defines a number of application services that are used to interact with objects in a
BACnet® device
BACnet®Testing aboratory (BT ) Certification
The UC400 Controller supports the BACnet communication protocol and has been designed to
meet the requirements of the application-specific control profile For more details, refer to the
BTL web site at www bacnetinternational org The UC400 Controller supports the following
equipment when used as an application-specific unit:
• Blower Coils
• Fan Coils
• Unit Ventilators
• WSHP (Variable Speed)
• VAV

BAS-SVX48H-EN 7
Specifications and Dimensions
Table 1. UC400/UC400–B Specifications
Storage
Temperature: –48°F to 203°F (–44°C to 95°C)
Relative Humidity: Between 5% and 95% (non-condensing)
Operating
Temperature: –40°F to 158°F (–40°C to 70°C)
Humidity: Between 5% and 95% (non-condensing)
Input Power: 20.4–27.6 Vac (24, ±15% nominal), 50Hz to 60Hz, 24 VA
(24 VA plus binary output loads for a maximum of 12 VA for each binary output)
Mounting Weight of
Controller:
Supporting mounting surface: must be 0.80 lb. (.364 kg)
Environmental Rating
(Enclosure):
NEMA 1
Altitude: 6,500 ft. maximum (1,981 m)
Installation: U.L. 840: Category 3
Pollution: U.L. 840: Degree 2
Housing Material:(a) Polycarbonate/ABS Blend
UV protected
U.L. 94-5VA flammability rating
Mounting: UC400: Mounts on EN 50 022 - 35 X 15 DIN rail.
UC400–B: Pre-mounted.
Agency Listing
UL916 PAZX, Open Energy Management Equipment
UL94-5V, Flammability
CE Marked
FCC Part 15, Subpart B, Class B Limit
AS/NZS CISPR 22:2006
VCCI V-3/2008.04
ICES-003, Issue 4:2004
Communications BACnet®MS/TP, supports BACnet Protocol ASHRAE 135-2004 and Meets BACnet Testing Laboratory (BTL) as an Application
Specific Controller (ASC) Profile Device
(a) Not applicable for the UC400-B model.

8BAS-SVX48H-EN
Figure 1. UC400 and UC400–B Dimensions
5.65 in. (143.5 mm)
(*8 Units)
4.00 in.
(101.6 mm)
2.37 in. (60.1 mm)
*DIN Standard 43 880, Built-in Equipment for Electrical Installation. Overall Dimensions and Related Mounting Dimensions.
1.89 in. (48 mm)
1.79 in. (45.4 mm)
14 Pin AMP
BO4
BO5
24VAC
GND BO6
BO7 BI2 BI2 BI3 BI3 AI5
GND
24VAC GND
14 13 12 11 10 9 8 7 6 5 4 3 2 1
J9
USB
J10
3 Pin
Mini
AMP
Service
J18
3 Pin
Mini
AMP
BO7
24VAC
J14 - JST
BO6
0
5
3
8
0
5
3
8
1
5
3
8
0
1
5
3
8
0
Address
AIP4 GND
J2
4 Pin Phoenix
24VAC GND 24VAC GND 24VAC
GND
J15 J17
P1
PI1 PI2
J4
BO9
GND
24VAC BO8
J16
BO1
24VAC
BO2
24VAC
BO3
24VAC
AMP
Phoenix
PhoenixPhoenix
24VDC
GND
Comm +
Comm -
5 pin Phoenix
J8
BACnet
4 Pin Phoenix
J13
AIP3 GND
AIP2
24VAC
AIP1
GND
J1
6 pin Phoenix
J6
AOP2
GND
Phoenix
J5
AOP1
GND
Phoenix
+ - + -
IMC
J12 - AMP
J11 - AMP
BI1 BI1
J3
Phoenix
UIP1
GND
UIP2
GND
24VDC
+
-Gnd 24VDC
1 2 3 4 5 6 1 2 3 4 5 6 123 4
123 4 12 3 4
1
23
4
1
23
4
1 2 3
12
12
21 345
12
1
2
2 1
3
4
56
6.125 in. (155.58 mm)
4.500 in.
(114.30 mm)
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BAS-SVX48H-EN 9
Device Connections
The following table provides details of the hardware termination configuration options The
hardware terminations are pre-configured for proper equipment operation for blower coil/fan coil
applications
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Table 2. Connections
Connection Quantity Types Range Notes
Analog input
(AI1 to AI5) 5
Temperature 10 kΩ thermistor
AI1 to AI4 can be configured for timed override capability.
Setpoint 189 Ω to 889 Ω
Resistive 100 Ω to 100 kΩ Typically used for fan speed switch.
Universal input
(UI1 and UI2) 2
Linear 0–20 mA
These inputs may be configured to be thermistor or resistive
inputs, 0–10 Vdc inputs, or 0–20 mA inputs.
Linear 0–10 Vdc
Temperature 10 kΩ thermistor
Setpoint 189 Ω to 889 Ω
Resistive 100 Ω to 100 kΩ
Binary Open collector/dry contact Low impedance relay contacts recommended.
Pulse Solid state open collector Minimum dwell time is 25 milliseconds On and 25 milliseconds
Off.
Binary input
(BI1 to BI3)(a) 324 Vac detect The UC400 controller provides the 24 Vac required to drive the
binary inputs when using the recommended connections.
Binary output
(BO1 to BO3)
(a)
3UC400:Relay
• 2.88 A @24 Vac C pilot
duty
• Gen Purpose
–10 A max up 277 Vac
–10 A max up to 30 Vdc
• Motor Duty
–1/3 hp @ 125 VAC
(7.5 A max)
–1/2 hp @ 277 VAC
(7.5 A max)
Power needs to be wired to the binary output. All outputs are
isolated from each other and from ground or power.
Note: Ranges given are per contact.
Other
Ranges UC400–B:TRIAC 24 Vac Powered
Binary output
(BO4 to BO9)(a) 6 TRIAC
•UC400: 0.5 A max @24-
277 Vac, resistive and pilot
duty
•UC400–B: 24 Vac
Powered
Use for modulating TRIAC. User determines whether closing high
side (providing voltage to the grounded load) or low side
(providing ground to the power load).
Note: Ranges given are per contact and power comes from
TRIAC SUPPLY circuit.

10 BAS-SVX48H-EN
Table 2. Connections (continued)
Connection Quantity Types Range Notes
Analog output/
binary input
(AO1/BI4 and
AO2/BI5)
2
Linear output 0–20 mA
Each termination must be configured as either an analog output
or binary input.
Linear output 0–10 Vdc
Binary input Dry contact
PWM output 80 Hz signal @ 15 Vdc
Pressure inputs
(PI1 and PI2) 2
3-wire 0–5 in H2O•UC400: Pressure inputs supplied with 5 volts of power.
Designed for Kavlico™ pressure transducers.
•UC400–B: Used as a binary input for condensate on WSHP.
Overall Point
Total 23
(a) Do Not mix Class 1 and Class 2 voltage wiring in an enclosure or on a controller without an approved barrier between the wiring.
DDeevviiccee CCoonnnneeccttiioonnss