Trane XL950 Thermostat Operation Manual

The Trane XL950 (ComfortLink II XL950 Control, TZONE950AC52ZA) is an advanced touch-screen communicating thermostat designed for Trane HVAC systems, including zoned environments. It features wireless connectivity for remote management via Nexia™ Home Intelligence, weather integration, programmable scheduling with guided setup, humidity control, air cleaner cycles, customizable home screen, and support for multi-system homes. Compatible with communicating and 24V systems via optional relay panel. Below are the key specifications and operation instructions.

Key Specifications

• Power: 24 VAC (18-32 VAC), 50/60 Hz; 7 VA consumption
• Operating Conditions: 25°F to 126°F (5% to 90% RH non-condensing)
• Storage Conditions: -40°F to 175°F (5% to 95% RH non-condensing)
• Sensor: Local/remote 10K NTC; Accuracy ±1°F (±0.5°C); Supports wireless zone sensors (60 ft range)
• Setpoint Ranges:
  • Cooling: 60°F to 99°F (1°F resolution)
  • Heating: 55°F to 90°F (1°F resolution)
• Temperature Range (Display): Indoor 20°F to 119°F; Outdoor -31°F to 119°F
• Humidity Range: 0% to 99% (1% resolution)
• Dimensions: 7.3” x 4.3” x 1.2” (185 x 109 x 30 mm)
• Compatibility: Communicating HVAC systems; 24V via BAY24VRPAC52DA relay panel; Zoned setups; 802.11 b/g wireless; R-410A refrigerant
• Features:
  • Touch-screen; Guided/Manual scheduling (7-day, 1-6 periods); 1-Touch Presets; Nexia™ remote access
  • Humidity/dehumidification control; Air cleaner modes; Weather integration; SD card for photos/updates
  • PIN security; Multi-system support; Auto software updates; Cycle rates 2-6 CPH
• Compliance: UL, FCC/IC for wireless, national codes

Operation Instructions

Initial Setup

1. Power On: Apply 24 VAC; auto-discovery for communicating systems.
2. Set Time/Date: Menu > Settings > Time & Date; auto-sync via wireless.
3. System Naming: Assign name for multi-system homes.
4. Scheduling: Use Guided Scheduling wizard or manual setup.
5. Wireless Setup: Enable radio, connect to 802.11 b/g network, register for Nexia™.

Home Screen Navigation

1. Display: Customizable dashboard with status, zones, weather, alerts.
2. Controls: Touch Menu for options; arrows for zones/photos; Help button for guidance.
3. Indicators: System mode icons, fan status, humidity levels, screen saver with temp overlay.

Operating Modes

1. Auto: Automatic heat/cool changeover.
2. Heat: Activates heating stages.
3. Cool: Activates cooling stages.
4. Off: No operation.
5. Emergency Heat: For heat pumps.
6. Fan: Auto, On, Circulate (10-55 min/hr).
7. Air Cleaner: Auto, Quick Clean (3 hrs), Allergy Clean (24 hrs).

Settings Screen

1. Access: Home > Menu > Settings.
2. Scheduling: Edit periods, copy days/zones; enable/disable.
3. Humidity: Adjust setpoints for heat/cool.
4. Screen Saver: Load photos via SD, set timeout (5-60 sec).
5. Security: Set PIN (default 1234).
6. Reminders: Filter, service alerts.

Advanced Features

1. Nexia™ Integration: Remote control, weather forecasts, email alerts.
2. Zoning: Per-zone schedules, status; copy between zones.
3. Software Updates: Auto via internet or SD card.
4. Events/Vacations: Temporary schedule overrides.
5. Diagnostics: Network checks, system status.
6. Customization: Shortcuts, multi-system wireless linking.

Troubleshooting

• No Display: Check 24 VAC R-B wiring, transformer.
  
• Incorrect Temp/Humidity: Calibrate sensors (±5°F/%).
  
• No Heat/Cool: Verify mode/setpoint, wait cycle delay (5 min cool/1 min heat), check alerts.
  
• Fan Issues: Check mode, humidity control, blower.
  
• Cycling Problems: Adjust cycle rate, recovery settings.
  
• Wireless Issues: Diagnostics menu; reboot.
  
• Persistent: Reboot via menu; contact dealer for alerts (e.g., 184.02).

Installation Instructions

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

Pre-Installation

• Location: Central, climate-controlled; avoid drafts/sun; ensure wireless signal (within 30 ft of router).
  
• Tools: Screwdriver, level, wire strippers.
  
• Wire: 18 AWG; max 500 ft communicating, 250 ft from transformer.

Wiring Diagrams

Terminal Designations (Communicating System):

Terminal	Description
R	24V Hot
B	24V Common
D	Data (ComfortLink II)
RS	Remote Sensor
ODT	Outdoor Temp Sensor

For 24V Systems: Use BAY24VRPAC52DA Relay Panel; additional terminals Y1/Y2 (comp stages), W1/W2/W3 (heat), G (fan), O/B (rev valve). 3-wire to thermostat (B, D, R). Jumper if single transformer.

Configuration Options

1. Mount subbase; connect wires per system type.
   
2. Power up; auto-discovery or manual via Installer Setup (hold Technician Access).
   
3. Set unit types/stages, cycles (2-6 CPH), sensors, accessories (humidifier/ERV/UV), comfort options (dehum, recovery).
   
4. Run system test.
   
5. Configure scheduling, wireless, zoning.

Calculation Tool

Estimate monthly energy savings from scheduling (assumes 3°F setback saving 0.12 kWh per hour unoccupied; 30 days/month).