Trane XR401 Comfort Control Operation Manual

The Trane XR401 Comfort Control (TCONT401AN21MA) is a digital non-programmable thermostat for 2-heat/1-cool conventional and heat pump systems. It features a backlit LCD display, separate heating/cooling setpoints, auto changeover, energy savings mode, filter reminder, outdoor temperature display (with sensor), and non-volatile memory for settings retention. Below are the key specifications and operation instructions.

Key Specifications

• Power: 20-30 VAC, 50/60 Hz, Class II
• Operating Conditions: 32°F to 110°F (0°C to 43°C); 5% to 90% RH non-condensing
• Storage Conditions: -40°F to 140°F (-40°C to 60°C); 5% to 90% RH non-condensing
• Setpoint Ranges:
  • Cooling: 65°F to 90°F (18°C to 32°C)
  • Heating: 40°F to 85°F (5°C to 29°C)
• Temperature Range (Display): Indoor 32°F to 99°F; Outdoor -40°F to 140°F
• Dimensions: Approx. 4” x 6” x 1” (standard wall-mount)
• Compatibility: 2H/1C conventional (gas/electric/oil*); 1H/1C heat pump; requires external relay for oil; BAYSEN01ATEMPA for outdoor sensor
• Features:
  • Backlit LCD; Auto/Manual changeover; Energy Savings mode; Filter reminder; Outdoor temp display/calibration
  • Cycle rates adjustable; Min off time: 5 min cool/1 min heat; Non-volatile memory
• Compliance: National/state/local codes; NEC Class II

Operation Instructions

Initial Setup

1. Power On: Ensure furnace power is ON and blower door secure; display activates automatically.
2. User Setup: Press and hold MODE + FAN; use MODE to advance, FAN to back, arrows to adjust.
3. Set Mode/Fan: Press MODE for Heat/Cool/Off/Auto/Em Heat; FAN for Auto/On.
4. Adjust Setpoints: Use up/down arrows; defaults 68°F heat/78°F cool.

Home Screen Navigation

1. Display: Indoor temp, setpoint, mode (bordered), outdoor temp, fan status, alerts (filter/OD).
2. Controls: Up/down arrows for setpoint; MODE/FAN buttons; FILTER/OD for reminders/outdoor view.
3. Indicators: Border around active mode; flashing FILTER/OD for alerts.

Operating Modes

1. Heat: Activates heat when below setpoint.
2. Cool: Activates cool when above setpoint (5-min delay).
3. Auto: Switches heat/cool with deadband.
4. Off: No operation.
5. Emergency Heat: For heat pumps; aux heat only.
6. Energy Savings: Adjusts setpoint for efficiency (warmer cool, cooler heat).
7. Fan: Auto (with calls) or On (continuous).

Settings Screen

1. Access: Hold MODE + FAN for User Setup.
2. Options: Outdoor calibration (±5°F), filter timer (days), deadband (for Auto).
3. Filter Reset: Press FILTER/OD when flashing.
4. Setpoints: Separate heat/cool; 1°F increments.

Advanced Features

1. Auto Changeover: Enable in setup; deadband prevents short cycling.
2. Energy Savings: Press button; auto-adjusts for lower energy use.
3. Filter Reminder: Set timer; flashes when due.
4. Outdoor Display: With sensor; calibrate in setup.
5. Non-Volatile Memory: Retains settings without batteries.

Troubleshooting

• Blank Display: Check fuse/breaker, power switch, blower door.
  
• No Heat/Cool: Verify mode/setpoint, wiring, cycle delays; test in manual mode.
  
• Incorrect Temp: Calibrate outdoor sensor; check location.
  
• Filter Alert: Reset timer; replace filter.
  
• Persistent: Check setup options; contact Trane dealer.

Installation Instructions

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

Pre-Installation

• Location: 60" above floor, interior wall; avoid outside walls, drafts, sun.
  
• Tools: Screwdriver, level, wire strippers.
  
• Wire: 18 AWG min; 3-9 wires.

Wiring Diagrams

Terminal Designations (Typical for 2H/1C):

Terminal	Description
R	24V Hot
C	Common
W1	Heat Stage 1
W2	Heat Stage 2/Aux
Y1	Compressor Stage 1
G	Fan
O/B	Reversing Valve
OS1/OS2	Outdoor Sensor

Notes: External relay for oil; TAYPLUS103A for dual fuel. See diagrams for specific configs (e.g., single stage cool/heat).

Configuration Options

1. Mount base; connect wires per diagram.
   
2. Power up; access Installer Setup (MODE + UP hold): Set system type, cycle rates, etc.
   
3. Configure: Heat pump/AC, gas/electric, outdoor sensor, filter timer.
   
4. Test: Normal/manual modes for fan/heat/cool.
   
5. User setup for calibration/deadband.

Calculation Tool

Estimate monthly energy savings from Energy Savings mode (assumes 2°F adjustment saving 0.1 kWh per hour; 30 days/month).