Trane Tracer UC400 Installation and operating instructions

SSAAFFEETTYY WWAARRNNIINNGG
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
February 2021 BBAASS--SSVVXX006655EE--EENN
Installation, Operation, and Maintenance
Tracer®® UC400/UC400–B
Programmable Controller
Water Source Heat Pump (WSHP)

©2021 Trane BAS-SVX065E-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) that provides
direct-digital zone temperature control This 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 Water Source Heat Pump (WSHP)
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 Listings and Compliance
The European Union (EU) Declaration of Conformity is available from your local Trane®office
evision History
• Updated table 7 "Output test states" in chapter Typical Applications and Terminations
• Added new topic "Constant Torque ECM Fans" in Sequence of Operation chapter
• Changed the Dehumidification text to Active Dehumidification
• Added new topic "Passive Dehumidification" in Sequence of Operation chapter
• Added "Unit Configuration" diagnostics cause and diagnostics in table 18
• Running edits

BAS-SVX065E-EN 3
BACnet Protocol 5
BACnet®Testing Laboratory (BTL) Certification 5
Specifications and Dimensions 6
Device Connections 8
Additional Components 10
Water, Discharge, and Outdoor Air Temperature Sensors 10
Binary Input Switching Devices 10
Zone Temperature Sensors 10
Valve and Damper Actuators 11
Zone Humidity Sensor 11
Expansion Modules 11
Typical Applications and Terminations 12
Binary Inputs 14
BI1; Occupancy 14
BI2; Compressor 1 Protection Status 14
BI3; Compressor 2 Protection Status 14
BI3/BI4; Frost Detection 14
BI5; Fan Status 14
Analog Inputs 15
Ground Terminals 15
AI1; Space Temperature 15
AI2; Space Temperature Local Setpoint 15
AI3; Local Fan Mode Input 15
AI4; Discharge Air Temperature Sensor 15
AI5; Entering Water Temperature 16
Universal Inputs 16
UI1; Leaving Water Temperature 16
UI2; Relative Humidity or CO2Sensor 16
Pressure Inputs 16
PI1; Condensate Overflow 16
Wiring Requirements 16
UC400 Wiring Diagrams 17
UC400–B Wiring Diagrams 22
Wiring Installation 27
Connecting Wires to Terminals 27
BACnet MS/TP Link 27
MAC Address 27
BACnet Device ID 27
BACnet Networks, With or Without Tracer SC Controller 27
Table of Contents

4BAS-SVX065E-EN
Without a Tracer SC Controller 27
With a Tracer SC Controller 27
BACnet MS/TP Link Wiring 28
Power Supply 29
Transformer Recommendations 29
Wiring Requirements 29
Connecting 24 Vac Secondary Wires 30
Power On Check 31
LED Description, Activities, and Troubleshooting 32
Sequence of Operation 35
Power-up Sequence 35
Random Start 35
Occupancy Modes 35
Occupied Mode 36
Unoccupied Mode 36
Occupied Standby Mode 36
Occupied Bypass Mode 37
Timed Override Control 37
Heat/Cool Operation 37
Fan Operation 38
Single-Zone VAV/Variable Speed Fan Operation 38
Entering Water Temperature Sampling Function 40
Electric Heat Operation 42
Other Modes 43
Operational Troubleshooting 47
Diagnostics 47
Override Outputs 48
Resetting Diagnostics 50
High/Low Pressure Cutout 50
Manual Output Test 50
Cycling Power 50
Building Automation System (BAS) 50
Tracer TU Service Tool 50
Cycling the Fan Switch 50
Operational Causes and Diagnostics 51
Configuration and Maintenance 54
Resources 57
TTaabbllee ooff CCoonntteennttss

BAS-SVX065E-EN 5
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 Laboratory (BTL) 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
• VAV

6BAS-SVX065E-EN
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.

BAS-SVX065E-EN 7
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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8BAS-SVX065E-EN
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) 3
24 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.

BAS-SVX065E-EN 9
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) 23-wire 0–5 in H2OUsed 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.
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10 BAS-SVX065E-EN
Additional Components
The UC400 Controller requires the use of additional components for monitoring and proper
control of associated equipment The use of specific components is dependent on the type of
application
NNoottee:: Additional components are not included with the UC400 Controller.
Water, Discharge, and Outdoor Air Temperature Sensors
Temperature sensors must be Trane 10 kΩ (at 25°C) thermistors Entering water and discharge air
inputs can use a sealed temperature sensor (part numbers 4190 1100 and 4190 1133)
Binary Input Switching Devices
Occupancy, condensate overflow, compressor protection, frost detection, and fan status inputs
accept switching devices that may have normally open (NO) or normally closed (NC) dry
contacts
Zone Temperature Sensors
The following table provides the sensor types and features supported by the UC400 Controller
Table 3. UC400 controller supported sensors and features
Features
Sensor
Type Setpoint Fan
Control System Occupancy LEDs Part
Number BAYSENS Global
Parts
Temperature
Sensor No
No No
No
No
X1351152801 BAYSENS077A SEN01448
No Yes X1351153001 BAYSENS073A SEN01450
Temperature
Sensors w/
Fan Control
Single • Off
• Auto
No
Yes
No
X1379084501
N/A
SEN01521
Single
• Off
• Auto
• Low
• High
Yes X1379084801 SEN01524
Single
• Off
• Auto
• Low
• Medium
• High
Yes X1379084201 SEN01518
Temperature
Sensor w/
LCD Display
(a)
Single
• Off
• Auto
• Low
• Medium
• High
No
Can be
configured
for
occupancy
No X1379088604 N/A N/A