Trane XR102 Thermostat Operation Manual

The Trane XR102 (TCONT102) is a non-programmable digital thermostat for single-stage conventional and heat pump systems. 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 4-minute compressor protection delay. Below are the key specifications and operation instructions.

Key Specifications

• Model: TCONT102 (XR102)
• Configurations: Heat/Cool
• Maximum Stages: 1 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
  • System: 20-30 VAC, 50/60 Hz
• Setpoint Range: 50°F to 90°F (10°C to 32°C)
• Display: Digital LCD
• Compatibility: Gas, oil, electric (millivolt and 24V), heat pumps
• Features: Auto changeover, emergency heat, compressor delay (4 min), low battery indicator
• Compliance: National electrical codes

Operation Instructions

Initial Setup

1. Install Batteries: Insert 2 AA alkaline batteries; low battery icon appears when replacement needed.
2. Mount Thermostat: Follow installation steps; power from system if C wired.
3. Set System Type: No configuration needed; defaults to heat/cool.
4. Adjust Setpoints: Use up/down arrows for initial heat/cool temperatures.

Home Screen Navigation

1. Display: Shows current room temperature, setpoint, mode icons (heat/cool), low battery symbol.
2. Controls: Up/down arrows to adjust setpoint; SYSTEM switch for mode selection; FAN switch for fan control; HOLD button for temporary override.
3. Indicators: Flame for heat, snowflake for cool; compressor delay countdown if applicable.

Operating Modes

1. Off: No heating or cooling; fan off unless set to On.
2. Heat: Activates heat when below setpoint; flame icon.
3. Cool: Activates cooling when above setpoint; snowflake icon.
4. Auto: Switches between heat and cool based on setpoints (3°F deadband default).
5. Em Heat: Emergency heat for heat pumps; uses auxiliary heat.
6. Fan: Auto (runs with system calls) or On (continuous).

Settings Screen

No advanced settings menu; adjustments via physical switches and buttons. Setpoints stored simultaneously for heat and cool. Increments of 1°F. Compressor protection: 4-minute minimum off time.

Advanced Features

1. Auto Changeover: Automatically switches between heat and cool modes.
2. Compressor Protection: 4-minute delay to prevent short cycling.
3. HOLD Function: Press HOLD to override automatic operation temporarily.
4. Battery Operation: Functions without C wire using batteries.

Troubleshooting

• Blank Display: Replace batteries; check for voltage spikes.
  
• Erratic Operation: Reset thermostat: Press Up and Down arrows while switching SYSTEM from OFF to HEAT.
  
• No Heat/Cool: Verify mode/setpoint, wiring, system power; check for 4-min delay.
  
• Low Battery: Replace 2 AA batteries; icon blinks.
  
• Persistent Issues: Contact Trane service; ensure proper installation.

Installation Instructions

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

Pre-Installation

• Location: 5 ft above floor, interior wall; avoid sun, drafts, heat sources (see Figure 1).
  
• Tools: Screwdriver, wire strippers, level.
  
• Wire: 18-22 AWG.

Wiring Diagrams

Terminal Designations (Common for most configurations):

Terminal	Description
R	24V Hot
C	Common (optional for battery mode)
W	Heat Stage 1
Y/Y1	Compressor Stage 1
G	Fan
O/B	Reversing Valve (for heat pumps)

Notes: Specific diagrams for cooling with TAM7/TAM9, S9V2 furnace, heat/cool packages, etc. Connect third-party switches between Y and Y1 for condensate. X2 for aux heat during defrost in some setups. Jumper if single transformer.

Configuration Options

1. Remove old thermostat, label wires.
   
2. Mount baseplate level on wall.
   
3. Connect wires per diagram for system type.
   
4. Attach thermostat cover; insert batteries.
   
5. Test operation: Set to heat/cool, adjust setpoint.

Calculation Tool

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