Trane XR103 Thermostat Operation Manual

The Trane XR103 (TCONT103) is a non-programmable digital thermostat designed for heat pump systems up to 2 stages of heat and 1 stage of cool. It features a simple interface with up/down arrows for setpoint adjustment, SYSTEM and FAN switches, battery-powered operation (with optional 24V common), auto changeover, emergency heat mode, and a 5-minute compressor protection delay. Below are the key specifications and operation instructions.

Key Specifications

• Model: TCONT103 (XR103)
• Configurations: Heat Pump
• Maximum Stages: 2 Heat, 1 Cool
• Dimensions: 3-7/8” x 5-1/2” x 1-3/16” (HxWxD)
• Operating Temperature: 32°F to 105°F (0°C to 41°C), 90% RH non-condensing
• Shipping Temperature: -40°F to 150°F (-40°C to 66°C)
• Power:
  • Battery: 2 AA Alkaline, 3VDC (optional C wire)
  • System: 20-30 VAC, 50/60 Hz, 0.03 amps max
• Setpoint Range: 50°F to 90°F (10°C to 32°C)
• Display: Digital LCD with icons
• Compatibility: Heat pumps with TAM Series indoor units, variable speed gas furnaces, heat/cool packages, GAT2/GAM2/TEM3/TEM4
• Features: Auto changeover, emergency heat, compressor delay (5 min), low battery indicator
• Compliance: National, state, local codes

Operation Instructions

Initial Setup

1. Install Batteries: Insert 2 AA alkaline batteries into the compartment.
2. Mount Thermostat: Follow installation; power from system if C wired.
3. Set Initial Mode: Use SYSTEM switch to select HEAT, COOL, or OFF.
4. Adjust Setpoint: Use up/down arrows to set desired temperature.

Home Screen Navigation

1. Display: Shows current room temperature, setpoint, mode icons (flame for heat, snowflake for cool), low battery symbol, malfunction indicator.
2. Controls: Up/down arrows for setpoint; SYSTEM switch (HEAT/OFF/COOL); FAN switch (AUTO/ON).
3. Indicators: Flame icon in HEAT; to prevent static, touch battery compartment before keys.

Operating Modes

1. Off: No heating or cooling; fan off unless ON.
2. Heat: Activates heat when below setpoint; flame icon.
3. Cool: Move SYSTEM to COOL; press down arrow below room temp; blower on high, then cold air.
4. Auto: Automatic changeover (not explicitly detailed, but supported).
5. Em Heat: For heat pumps; uses auxiliary heat.
6. Fan: AUTO (with calls) or ON (continuous).

Settings Screen

No programmable settings; adjustments via switches and arrows. 1°F increments. Compressor protection: 5-minute minimum off time.

Advanced Features

1. Auto Changeover: Switches between heat and cool.
2. Compressor Protection: 5-minute delay.
3. Battery Backup: Operates without C wire.

Troubleshooting

• Blank Display: Replace batteries; check voltage spikes.
  
• Erratic Operation: Reset: Press up/down arrows while switching SYSTEM from OFF to HEAT; or remove batteries for 5 seconds.
  
• No Heat/Cool: Verify mode/setpoint, wiring, system power; wait 5-min delay.
  
• Low Battery: Replace 2 AA; icon appears.
  
• Malfunction: Check display icon; contact service.
  
• Persistent Issues: Contact Trane service.

Installation Instructions

Warning: Qualified personnel only. Disconnect power. Follow lockout/tagout. Comply with codes.

Pre-Installation

• Location: 5 ft above floor, interior wall; avoid sun/drafts/heat (per standard guidelines).
  
• Tools: Screwdriver, wire strippers, level.
  
• Wire: 18-22 AWG.

Wiring Diagrams

Terminal Designations (Standard for Heat Pump Configurations):

Terminal	Description
R	24V Hot
C	Common (optional)
Y/Y1	Compressor Stage 1
W1	Aux Heat Stage 1
G	Fan
O/B	Reversing Valve
X2	Aux Heat during Defrost (some setups)

Notes: Wire third-party condensate switches between Y and Y1. X2 for aux during defrost in variable speed furnaces. Specific diagrams for TAM, gas furnace, packages, etc. Jumper if single transformer.

Configuration Options

1. Turn off power; remove old thermostat, label wires.
   
2. Pull cover off; connect wires to base per diagram.
   
3. Mark and drill mounting holes; push wires in, mount base.
   
4. Attach cover; insert batteries.
   
5. Test: Set modes, adjust setpoints, verify operation.

Calculation Tool

Estimate monthly energy savings from manual adjustments (assumes 2°F setback saving 0.1 kWh per hour; 30 days/month).