Trane TZONE950AC52ZA Thermostat Operation Manual

The Trane TZONE950AC52ZA (ComfortLink II XL950) is a 7-inch color touch screen communicating thermostat for HVAC and zoning systems. It supports heat pump, heat/cool, dual fuel configurations, load-based staging, dehumidification/humidification/ventilation control, and integration with Trane communicating equipment. Features include 1-Touch Presets, Aggressive Recovery, diagnostics, and wireless multi-system linking. Below are the key specifications and operation instructions.

Key Specifications

• Type: ComfortLink II Communicating 7-inch color touch screen thermostat for HVAC and zoning systems
• Compatibility:
  • Trane communicating indoor/outdoor units; optional Relay Panel for 24V non-communicating systems; Zone Panel, Zone Sensors (wired/wireless), Zone Dampers, Wired Remote Outdoor Sensor (BAYSEN01ATEMPA), Wired Remote Sensor (ZZSENSAL0400AA)
  • Zoning up to 60 ft. wireless range; wireless via 802.11 b/g; multi-system linking
• Power:
  • 24 VAC (18-32 VAC), 7 VA consumption
  • Wire: 18 AWG, max total 500 ft.
• Temperature Range:
  • Cooling Setpoint: 60°F to 99°F
  • Heating Setpoint: 55°F to 90°F
  • Display: 20°F to 119°F (indoor), -31°F to 119°F (outdoor)
• Operating Conditions: 25°F to 126°F / 5-90% RH non-condensing
• Dimensions: 7.3” x 4.3” x 1.2” (WxHxD)
• Features:
  • Touch screen; Heat/Cool/Auto/Em Heat modes; Fan: On/Auto/Circulate
  • 1-Touch Presets; Aggressive Recovery; Air Cleaner (Auto/Quick/Allergy); Dehumidification/Humidification; Dual Fuel; Diagnostics/History; Scheduling (7-day); Weather; Software updates via SD card
  • Min cycle off: Compressor 5 min, Heat 1 min; Blower delays configurable
• Compliance: National, state, local codes; 18-gauge NEC-approved wiring

Operation Instructions

Initial Setup

1. Power Up: Connect power (R/B/D); auto-discovery for communicating systems.
2. Manual Setup: For 24V: Installer Setup via Technician Access (hold 5 sec).
3. Wireless: Configure via User’s Guide for weather/multi-system.
4. Calibrate: Sensors (±5°F indoor temp/RH, ±10°F outdoor).

Home Screen Navigation

1. Display: Setpoints, modes, alerts; touch for details.
2. Controls: Touch screen; Menu for settings; Help button for info.
3. Indicators: Alerts, load values, zoning status.

Operating Modes

1. Heat: Select Heat; load-based staging; humidification.
2. Cool: Select Cool; dehumidification.
3. Off: No operation.
4. Auto: Changeover with deadband.
5. Emergency Heat: Aux heat bypass.
6. Fan: On (35-100% variable), Auto, Circulate (10-55 min/hr).

Settings Screen

1. Access: Menu > Service > Technician Access > Installer Setup.
2. Standard: Equipment config (stages, compressor type).
3. Advanced: Cycles (1-6), lockouts (5-70°F), airflow %, accessories (humidifier/UV/ERV).
4. Comfort: Dehumid overcool 0-3°F, response rate.
5. Reset: Equipment Defaults or Advanced Settings.

Advanced Features

1. 1-Touch Presets: Home/Away/Sleep.
2. Aggressive Recovery: Disable 10-min inhibit for >2°F changes.
3. Air Cleaner: Auto/Quick/Allergy cycles.
4. Dehumidification: Blower airflow reduction up to 30%, overcool 1-3°F.
5. Humidification: With/without heat; steam adds 60-sec delay.
6. Dual Fuel: Balance point by comfort/cost/temp.
7. Weather/History: Forecast/radar; runtime/cycles logs.

Troubleshooting

• No Display: Check R/B wiring, 24 VAC transformer.
  
• Incorrect Temp: Calibrate; check location.
  
• No Heat/Cool: Verify mode/setpoint, delays; service system.
  
• Overshoot: Check equipment size; disable Aggressive Recovery.
  
• Fan Issues: Check mode/humidity; repair motor.
  
• Cycles Too Fast/Slow: Seal drafts; adjust cycles/recovery.
  
• Alerts: View diagnostics; critical (red) requires service.

Installation Instructions

Warning: Qualified personnel only. Disconnect power. Comply with codes.

Pre-Installation

• Location: Central, good circulation; avoid exterior walls/windows/vents.
  
• Tools: Screwdriver, drill, level.
  
• Prep: Size transformer for 24 VAC loads; test wireless signal.

Wiring Diagrams

Terminal Designations:

Terminal	Description
R	24 VAC Hot
B	Common
D	Data
RS	Remote Sensor
ODT	Outdoor Temp Sensor

Notes: 3-wire (R/B/D) for communicating; max 500 ft. total. For 24V: Use Relay Panel. Ground unused wires; shielded cable optional.

Configuration Options

1. Mount sub-base; connect wires.
   
2. Power up; auto-discovery or manual Installer Setup.
   
3. Configure: Equipment type/stages, cycles (1-6), lockouts, accessories.
   
4. Zoning: Calibrate zones; test dampers/sensors.
   
5. Run System Test; update software via SD card.

Calculation Tool

Estimate monthly energy savings from zoning (assumes 0.3 kWh saved per daily zone adjustment; 30 days/month).