Trane XR102 Non-Programmable Thermostat

Installation and User Guide

Introduction

This document provides installation and user guidance for the Trane XR102 (TCONT102) Non-Programmable Thermostat. It covers safety precautions, product specifications, installation procedures, thermostat operation, and troubleshooting.

All installation phases must comply with National, State, and Local Codes.

IMPORTANT: This document is customer property and is to remain with this unit. These instructions do not cover all variations in systems or provide for every possible contingency. Refer to your installing dealer or local distributor for further information.

Publication Number: 18-HD54D1-1B-EN

Part Number: 37-7770002

Revision Date: September 2020

1. Safety

WARNING: FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE.

This information is intended for use by individuals with adequate backgrounds in electrical, mechanical, and HVAC experience. Attempts to repair an HVAC system may result in personal injury or property damage. The manufacturer or seller is not responsible for the interpretation or use of this information.

LIVE ELECTRICAL COMPONENTS: During installation, testing, servicing, and troubleshooting, it may be necessary to work with live electrical components. Failure to follow all electrical safety precautions could result in death or serious injury.

Do not use on circuits exceeding specified voltage.
Do not short out terminals on gas valve or primary control to test.

CAUTION: To prevent electrical shock and/or equipment damage, disconnect electric power to the system at the main fuse or circuit breaker box until installation is complete.

To prevent compressor and/or property damage, if the outdoor temperature is below 55°F (13°C), DO NOT operate the cooling system. Ensure compressor oil heaters have been operational for six hours and the system has not been operational for at least five minutes before running the compressor.

ATTENTION: MERCURY NOTICE

This product does not contain mercury. However, it may replace a product that does. Mercury and products containing mercury must not be discarded in household trash. Do not touch any spilled mercury. Clean up spilled mercury with non-absorbent gloves and place in a sealed container. For proper disposal, refer to www.thermostat-recycle.org.

2. Product Specifications

SPECIFICATION	DESCRIPTION
Product Models	TCONT102
Product	XR 102
Size	3-7/8" x 5-1/2" x 1-3/16" (HxWxD)
Configurations	Heat / Cool
Maximum Number of Stages	1H, 1C
Operating Temperature	32°F to 105°F (0 to +41°C) / 90% RH Non Condensing
Shipping Temperature Range	-40°F to 150°F (-40° to 66°C)
Input Power (DC)	Two 1.5V AAA Alkaline
Input Power (AC)	20 - 30 VAC, NEC Class II, 50/60 HZ
Wire Usage	18 AWG
System Modes	Heating, Cooling, Off
Fan Modes	Auto, On
Cooling Setpoint Temperature Range	45°F to 90°F, 1°F resolution
Heating Setpoint Temperature Range	45°F to 90°F, 1°F resolution
Temperature Display Range	4°F to 99°F, 1°F resolution
Minimum Cycle Off Time Delay	Compressor: 5 minutes, Indoor Heat; none
Terminal Load	1.0A per terminal, 1.5A maximum all terminals combined
Operating Ambient	32°F to +105°F (0° to +41°C)
Shipping Temperature Range	-40°F to +150°F (-40° to +65°C)

Thermostat Application Guide

Thermostat Applications	Maximum Stages Heat/Cool
Gas, Oil, Electric, (mV and 24V), Heat Only, Cool Only or Heat/Cool Systems	1/1

3. General Information

3.1 Overview

The XR102 is a non-programmable 1H/1C thermostat with a 2" digital display.

3.2 Contents

1-Thermostat
2-Phillips slotted head mounting screws
2-Nylon Drywall Anchors
1-Installation Guide / User Guide

4. Installation

4.1 Location

The XR102 is designed for installation in climate-controlled living spaces. Place the unit in a central location with good air circulation.

For proper temperature sensing, avoid exposing the thermostat to heat radiated from lamps, sunlight, fireplaces, or any other radiant heat source.

Avoid locations close to windows, behind doors, or in alcoves with poor air circulation, adjoining outside walls, or doors that lead to the outside.

Select a location that prevents the thermostat from being directly exposed to air currents from supply registers or ceiling fans.

Mount the control on a section of interior wall that does not contain hot or cold water pipes or ductwork.

Figure 1: Placement of the 102

Correct Placement: Position the thermostat approximately 2 feet from the ceiling and 5 feet from the floor. Ensure natural heat dissipation from the thermostat itself and avoid direct airflow from vents or fans. The onboard thermistor measures ambient temperature.

Incorrect Placement: Avoid placement near ceiling fans, vents, or areas with direct airflow that could lead to inaccurate temperature readings.

4.2 Mounting / Installation

Follow these steps to mount the XR102 thermostat to the wall:

Turn OFF all power to heating and cooling equipment.
If replacing an existing thermostat:
- Record the color and terminal marking of each wire.
- Disconnect wires from the existing thermostat, being careful not to let them fall back into the wall.
- Remove the existing thermostat from the wall.
Pull the thermostat cover off the body. Do not force or pry.
Position the thermostat body over the wall opening and mark mounting hole locations using the base as a template.
Move the base out of the way, drill mounting holes, and mount the sub-base to the wall. Pull the wire bundle through the hole in the base. Leveling is for appearance only.
Connect wires to the terminal block on the base using the appropriate wiring diagram.
Push excess wire into the wall and plug the hole with fire-resistant material (like fiberglass insulation) to prevent drafts.
The thermostat includes two "AAA" alkaline batteries with a battery tag to prevent power drainage.
Remove the battery tag to engage the batteries.

IMPORTANT: Do not exceed specification ratings. All wiring must conform to local and national electrical codes. This control is a precision instrument; handle carefully to avoid malfunction.

Typical Terminal Designations and Jumper Information

The thermostat base has terminals for connecting wires. Key terminals include R (power), Rc/Rh (power), W (heating), Y (cooling), G (fan), O (reversing valve), and B (reversing valve). Specific wiring diagrams are provided for different system types.

Jumper Information:

A jumper can be removed for 2-transformer RC/RH systems.
A jumper can be added for heat pump applications.
A W904 clip is available for Celsius display conversion.
A W905 clip is available for hydronic systems to produce longer heating cycles.

Electric/Gas Switch: Located on the thermostat base.

Battery Location: Located on the thermostat base.

4.3 Battery Replacement

To replace batteries, set the system to OFF, remove the thermostat cover, and install two premium brand "AAA" alkaline batteries in the bottom of the thermostat.

If the home will be unoccupied for an extended period (over 3 months) and the "CHANGE" indicator is displayed, replace the batteries before leaving.

CAUTION: Replace batteries when "CHANGE" is displayed. This indicates limited remaining battery life. The system will not operate with dead batteries.

CAUTION: To prevent compressor and/or property damage, if the outdoor temperature is below 55°F (13°C), DO NOT operate the cooling system. Ensure compressor oil heaters have been operational for six hours and the system has not been operational for at least five minutes.

4.4 Wiring Diagrams

The following diagrams illustrate typical wiring connections for various HVAC system configurations:

Cooling with TAM7/TAM9 (24V Mode): Shows connections between thermostat terminals (Rc, Rh, O, B, Y, G, W) and the Indoor Unit (R, Y1, G, W1, B) and Outdoor Unit (R, Y, B).
Cooling with GAF2-S: Shows connections between thermostat terminals and Indoor Unit (R, Y1, G, W1, B) and Outdoor Unit (Y, B).
Cooling with S9V2 Furnace: Shows connections between thermostat terminals and Indoor Unit (R, Y1, G, W1, B) and Outdoor Unit (Y, B).
Heat Cool Package with Variable Speed Blower: Shows connections between thermostat terminals and Indoor Unit (R, Y1, G, W1, B) and Outdoor Unit (Y, B).
Heat/Cool Package: Shows connections between thermostat terminals and Indoor Unit (R, Y1, G, W1, B).
Cooling with TEM6 or Variable Speed Gas Furnace: Shows connections between thermostat terminals and Indoor Unit (R, Y, G, W1, B) and Outdoor Unit (Y, B).
Cooling with GAT2, GAM2 & TEM3, 4: Shows connections between thermostat terminals and Indoor Unit (R, Y, G, W1, B) and Outdoor Unit (Y/Y1, B).

NOTES:

1) Wire third-party condensate overflow switches between Y of the thermostat and Y1 of the airflow control board.
2) X2 is required to energize auxiliary heat during defrost.

5. Thermostat Overview

5.1 Thermostat Operation

The Thermostat Buttons and Switches

1. Up Arrow: Raises temperature setting.
2. Down Arrow: Lowers temperature setting.
3. FAN Switch: Controls fan operation (ON, AUTO).
4. SYSTEM Switch: Selects operating mode (COOL, OFF, HEAT).

The Display

The digital display shows various indicators:

Heat Icon: Displayed when the SYSTEM switch is in the HEAT position.
Cool Icon: Displayed (non-flashing) when the SYSTEM switch is in the COOL position.
Lockout Indicator: Displayed (flashing) when the compressor is in lockout mode (e.g., 5-minute minimum off time).
Current Temperature: Displays the current ambient temperature.
Low Battery Indicator: The word "CHANGE" is displayed when the 2 "AAA" batteries are low and require replacement. The display will otherwise be blank.
Set Temperature: Displays the currently set temperature. This is blank when the SYSTEM switch is in the OFF position.

When "CHANGE" appears, replace batteries with new premium brand AAA alkaline batteries. If the home is unoccupied for an extended period and "CHANGE" is displayed, install new batteries before leaving.

5.2 Operating Features

Simultaneous Heating/Cooling Setpoint Storage: You can enter both heating and cooling setpoints at the same time, eliminating the need to re-enter them each season.
Temperature Setting: Press the Up or Down arrow buttons until the desired temperature is displayed. The thermostat will maintain this temperature.
°F/°C Convertibility: The factory default is Fahrenheit. Clipping the W904 jumper on the circuit board will switch the display to Celsius.
Low Battery Indicator: When batteries are low, "CHANGE" is displayed. Pressing any button will briefly activate the display. After 4 weeks of the "CHANGE" indicator being displayed, the thermostat will automatically adjust the setpoint by 10°F (up in COOL mode, down in HEAT mode) to conserve battery life.
Temperature Display Adjustment: The factory temperature setting can be adjusted within a ±3° range to match a previous thermostat. To adjust:
1. Press and simultaneously for two seconds with the SYSTEM switch in OFF.
2. Press and to adjust the displayed temperature.
3. Move the SYSTEM switch to OFF to exit the feature.
Display Backlight: The backlight improves visibility in low light. Selecting "ON" keeps the light on for a short period after a button press. "OFF" is the default. To turn the backlight ON:
1. Press and simultaneously for two seconds with the SYSTEM switch in HEAT. The display will show "-L" and "FF" (off).
2. Press and to change "FF" to "ON."
3. Move the SYSTEM switch to OFF to exit.

6. Troubleshooting

Reset Operation

If the display blanks out or the thermostat operates erratically due to a voltage spike or static discharge, you can reset it by pressing and simultaneously while moving the SYSTEM switch from OFF to HEAT. This also resets factory defaults.

If the thermostat has power, has been reset, and still does not function correctly, contact your heating/cooling service person or place of purchase.

Batteries

For best results, replace batteries once a year with new premium brand alkaline batteries.

SYMPTOM	POSSIBLE CAUSE	CORRECTIVE ACTION
No Heat/ No Cool/ No Fan (common problem)	1. Blown fuse or tripped circuit breaker 2. Furnace power switch to OFF 3. Furnace blower compartment door panel loose or not properly installed	1. Replace fuse or reset breaker 2. Turn switch to ON 3. Replace door panel properly to engage safety interlock or door switch
No Cool	1. System Switch not set to Cool 2. Loose connection to thermostat or system 3. Cooling System requires service or thermostat requires replacement	1. Set System Switch to Cool and lower setpoint below room temperature. 2. Verify thermostat and system wires are securely attached. 3. Follow "No Heat" diagnostic procedures, set thermostat to Cool, and lower setpoint. Allow up to a five-minute delay for cooling to engage.
No Heat	1. Pilot light not lit 2. System Switch not set to Heat 3. Loose connection to thermostat or system 4. Furnace Lock-Out Condition (Heat may be intermittent) 5. Heating System requires service or thermostat requires replacement	1. Re-light pilot. 2. Set System Switch to Heat and raise setpoint above room temperature. 3. Verify thermostat and system wires are securely attached. 4. Consult furnace manufacturer or service person for lock-out conditions. 5. Diagnostic: Set SYSTEM Switch to HEAT and raise setpoint. A soft click indicates proper operation. If no click, try reset. If still no click, contact service person for replacement. If click occurs, contact service person to verify heating system operation.
Heat, Cool or Fan Runs Constantly	1. Possible short in wiring. 2. Possible short in thermostat. 3. Possible short in heat/cool/fan system. 4. FAN Switch set to Fan ON.	Check wire connections for shorts. Reset thermostat. If condition persists, contact system manufacturer or service person. If system operates correctly, replace thermostat.
Furnace Cycles Too Fast or Too Slow (narrow or wide temperature swing)	1. The location of the thermostat and/or the size of the Heating System may be influencing the cycle rate.	Digital thermostats provide precise control and may cycle faster than older models. To increase cycle time, clip Jumper W-905 (for hydronic systems). Cycle rate for cooling is fixed. Contact a local service person for suggestions.
Thermostat Display & Thermometer Disagree	1. Thermostat thermometer setting requires adjustment.	Adjust thermometer setting +/- 3 degrees (See Temperature Display Adjustment in Operation section).
Cooling Cycles Too Fast or Too Slow (narrow or wide temperature swing)	1. The location of the thermostat and the size of the Cooling System can influence the cycle rate.	The cycle rate for cooling is fixed and cannot be adjusted. Contact a local service person for suggestions.
Thermostat Setting and Thermostat Thermometer Disagree	1. Thermostat thermometer setting requires adjustment.	The thermometer can be adjusted +/- 3 degrees. See Temperature Display Adjustment in the Operation section.
Blank Display and / or Keypad Not Responding	1. Voltage spike or static discharge. 2. Battery change required.	Replace batteries and check heat/cool system. Use Reset Operation if voltage spike occurred.

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