Trane TZONE940AC52Z Thermostat Operation Manual

The Trane TZONE940AC52Z is a communicating sensor with display for Trane ComfortLink II zoning systems. It features a wall-mounted low-voltage control for zone temperature and humidity, compatible with the 950 Control (v2.2+). It displays indoor temperature, humidity, PM, schedule status, outdoor conditions, modes, setpoints, and fan control. It supports overrides and integrates for multi-zone efficiency. Below are the key specifications and operation instructions.

Key Specifications

• Type: Communicating sensor with display for zoning systems
• Compatibility:
  • Trane ComfortLink II systems with 950 Control (software v2.2+); multi-zone setups with dampers
  • Stand-alone remote indoor temperature/humidity sensor or full communicating mode
• Power:
  • Low voltage 24 VAC; terminals: R (hot), B (common), D (data/power)
  • Wire: Standard low-voltage HVAC wiring
• Temperature Range:
  • Indoor temperature and humidity sensing; setpoint adjustments via 950 Control
• Operating Conditions: Climate-controlled indoor living spaces; avoid drafts/sun/heat sources
• Dimensions: 5.5” x 3.5” (WxH)
• Features:
  • Display: Indoor temp, humidity, PM, schedule, outdoor conditions, modes, setpoints, fan
  • Buttons: Cooling/Heating, Fan, Hold (overrides), Clean Screen, Auto
  • Icons: Alerts, signal strength, notifications; temporary/permanent holds
  • Included: Sensor, base, screws/anchors, guide
• Compliance: Base limited warranty against defects; registration extends coverage

Operation Instructions

Initial Setup

1. Mount Sensor: Follow installation; set zone address (hold INDOOR TEMP 5s).
2. Assign to Zone: On 950 Control: MENU > ZONES > SELECT ZONE > ZONE SENSOR > Assign address.
3. Customize Display: On 950: MENU > SETTINGS > SCREEN SETTINGS > ZONE SENSOR > Select options > APPLY.
4. Verify: Check signal icon; test modes/setpoints.

Home Screen Navigation

1. Display: Indoor temp/humidity/PM, schedule status, outdoor info, modes/setpoints, fan, icons (alerts/signal/notifications).
2. Controls: Cooling/Heating buttons for modes/setpoints (arrows adjust); Fan cycles options; Hold for overrides; Clean Screen activates safe mode.
3. Indicators: Triangle for critical alerts; signal bars for communication; hourglass for temporary holds.

Operating Modes

1. Heat: Press Heating; adjust setpoint (red arrows); flame icon; overrides schedule temporarily.
2. Cool: Press Cooling; adjust setpoint (blue arrows); snowflake icon.
3. Auto: System-level via 950 Control.
4. Off: Via 950 Control.
5. Fan: Auto/On (system-wide; last sensor setting applies).
6. Schedule: Home/Away/Sleep displayed; follows 950 settings.

Settings Screen

1. Access Setup: Hold INDOOR TEMP 5s; adjust SETUP NUMBER/SETTING (matrix in manual).
2. Overrides: Temporary (adjust, holds to next period); Hold Until (set end time); Permanent (indefinite).
3. Display Options: Via 950 Control: Temp scale, humidity display, etc.
4. Reset: Re-enter setup or power cycle via 950.

Advanced Features

1. Zoning Integration: Communicates with 950 for multi-zone control; assigns to specific damper.
2. Alerts/Notifications: Critical (triangle: contact dealer); general (bell icon).
3. Communication: Data wire for real-time updates; signal strength indicator.
4. Clean Screen: Activates to safely clean display without damage.

Troubleshooting

• Alert Icon (Temp Sensor Fail): SOP.004.00 on 950; use diagnostics.
  
• Alert Icon (Humidity Sensor Fail): SOP.004.03 on 950; troubleshoot via diagnostics.
  
• No Communication: Check signal icon; verify wiring/address.
  
• Setpoints Not Adjusting: Ensure assigned to zone; test overrides.
  
• Display Issues: Clean screen mode; avoid sprays/water.
  
• Persistent: Contact dealer; check 950 software version.

Installation Instructions

Warning: Qualified personnel only. Disconnect power. Seal penetrations.

Pre-Installation

• Location: Central, good circulation; 2 ft from vents, 5 ft from windows/doors; avoid exterior walls/drafts/heat.
  
• Tools: Drill (1/8” studs/3/16” anchors), screwdriver.
  
• Included: Sensor, base, screws/anchors, guide.

Wiring Diagrams

Terminal Designations:

Terminal	Description
D	Data/Power
R	24 VAC Hot
B	Common

Notes: Route wires through base center; connect to terminals. Seal wall hole after wiring. Use with 950 Control v2.2+.

Configuration Options

1. Mount base: Drill holes, insert anchors/screws.
   
2. Wire: Connect D/R/B; snap sensor on.
   
3. Set Address: Hold INDOOR TEMP 5s; Setup #1, enter 1-6, Done.
   
4. Assign: On 950, MENU > ZONES > ZONE SENSOR > Select/Enter address.
   
5. Test: Verify display, communication, modes.

Calculation Tool

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