Trane XR203 Thermostat Operation Manual

The Trane XR203 (TCONT203) is a programmable push-button thermostat with a 3.5-inch backlit display for heat/cool and heat pump systems up to 4 stages of heat and 2 stages of cool. It supports 7-day, 5-1-1, or non-programmable scheduling with up to 4 periods per day, temporary overrides, permanent hold, early start, circulation fan, auto changeover, filter reminders, keypad lock, and compressor lockout. Below are the key specifications and operation instructions.

Key Specifications

• Power: Two 1.5V AA alkaline batteries (DC); 20-30 VAC, 50/60 Hz (AC)
• Operating Conditions: 32°F to 105°F (0°C to 41°C); 90% RH non-condensing
• Storage Conditions: -20°F to 150°F (-29°C to 65°C)
• Setpoint Ranges:
  • Cooling: 45°F to 99°F
  • Heating: 45°F to 99°F
• Temperature Range (Display): 32°F to 99°F
• Dimensions: 3-3/4” x 6” x 1-1/8” (H x W x D)
• Compatibility: Heat pump/heat/cool/dual fuel up to 4H/2C; gas/oil/electric; Trane units like TAM7/TAM9, S9V2, SV92
• Features:
  • 3.5-inch backlit LCD; 7-day/5-1-1/non-programmable scheduling; Compressor lockout (5 min)
  • Early start; Circulation fan; Auto changeover; Filter reminder (1-12 months); Keypad lock
  • Cycle rates (Fast/Med/Slow); Continuous display light (C-wire); Terminal load 1.5A/terminal
• Compliance: National/state/local codes; NEC Class II

Operation Instructions

Initial Setup

1. Install Batteries: Remove battery tag; insert 2 AA alkaline batteries.
2. Set Time/Date: Press Menu; adjust time/day with arrows; press Exit.
3. Set Mode/Fan: System: Heat/Cool/Off/Auto/Em Heat; Fan: Auto/On.
4. Schedule Type: Menu > Settings > Select 7-day/5-1-1/non-programmable.

Home Screen Navigation

1. Display: Current temp, setpoint, time/day, mode icons, battery status, alerts (e.g., filter, service).
2. Controls: Arrows for setpoint; Hold/Run for override; Menu for settings/schedule; Fan/System buttons.
3. Indicators: Heat On/Cool On/Aux On; Hold; Lock; FAn (circulation); Starting Soon (lockout).

Operating Modes

1. Auto: Automatic heat/cool changeover (enable in settings).
2. Heat: Activates heat stages when below setpoint; Aux if needed.
3. Cool: Activates cool stages when above setpoint.
4. Off: No operation.
5. Emergency Heat: For heat pumps; uses aux heat only.
6. Fan: Auto (with calls), On (continuous), Program (circulation %).

Settings Screen

1. Access: Press Menu > Settings.
2. Options: Schedule type (7/5-1-1/0), periods (2/4), early start, circulation fan (10-100%), scale (°F/°C), temp adjustment (±5°F), display light, filter reminder (1-12 mo), auto changeover.
3. Scheduling: Menu > Schedule; edit times/setpoints for periods (P1-P4) per day/group.
4. Overrides: Temporary (2+ hrs) or permanent Hold.

Advanced Features

1. Scheduling: 4 periods/day; factory defaults: Wake 6AM 70/78, Leave 8AM 62/85, Return 5PM 70/78, Sleep 10PM 62/82.
2. Early Start: Pre-conditions to reach setpoint on time.
3. Circulation Fan: Min run time % (e.g., 30% daily).
4. Keypad Lock: Hold up + Menu; unlock same.
5. Compressor Lockout: 5-min delay (Installer menu).
6. Cycle Rates: Fast/Med/Slow for heat/aux/cool.

Troubleshooting

• Blank Display: Replace batteries; reset by removing for 2 min.
  
• No Heat/Cool: Check mode/setpoint, wiring, power; wait 5-min lockout; test fan/heat/cool.
  
• Constant Running: Check for shorts; reset thermostat.
  
• Cycling Issues: Adjust cycle rates in Installer Menu.
  
• Temp Disagree: Adjust display (±5°F).
  
• Filter Alert: Replace and reset in settings.
  
• Persistent: Contact Trane service; check service icon.

Installation Instructions

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

Pre-Installation

• Location: Interior wall, 5 ft above floor; avoid drafts/sun/heat/pipes/ducts.
  
• Tools: Screwdriver, level, wire strippers, drill.
  
• Wire: 18 AWG; keep away from inductive loads.

Wiring Diagrams

Terminal Designations (Common):

Terminal	Description
Rc	24V Hot (Cooling)
Rh	24V Hot (Heating)
O/B	Reversing Valve
Y/Y1	Compressor Stage 1
Y2	Compressor Stage 2
G	Fan
W/E	Heat Stage 1/Emergency
W2	Heat Stage 2/Aux
C	Common
L	System Monitor

Notes: Jumper Rc/Rh if single transformer (clip if separate). Specific diagrams for TAM7/TAM9, S9V2, SV92, GAF2-S, etc. Wire condensate switches between Y and Y1. X2 for aux during defrost.

Configuration Options

1. Mount sub-base; connect wires per diagram.
   
2. Power up; access Installer Menu (hold Menu 8s): Set outdoor (AC1/2/HP1/2), indoor (GA/EL/FAN), emergency (On/Off), O/B (O/B/3), fan %, cycle rates, lockout, limits, schedule type, early start, scale, adjustment, light, filter, auto changeover, lock.
   
3. Test: Fan On/Auto, Heat/Cool calls, Aux.
   
4. Set user schedule/time.
   
5. Reset if needed (remove batteries 2 min).

Calculation Tool

Estimate monthly energy savings from scheduling (assumes 3°F setback saving 0.15 kWh per hour unoccupied; 30 days/month).