Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Venstar TSTATEZ EZ Stat Thermostat. Please read this manual thoroughly before attempting installation or operation to ensure proper function and to avoid potential issues. Keep this manual for future reference.
Product Overview
The Venstar TSTATEZ EZ Stat Thermostat is a programmable, multi-stage thermostat designed for residential and light commercial HVAC systems. It features a clear, backlit display and intuitive controls for managing your heating and cooling preferences.
Image: Front view of the Venstar TSTATEZ EZ Stat Thermostat, displaying '12:00 Am', 'SLEEP', '88°', and 'HEAT 88' on a green backlit screen, with up/down arrow buttons and a small circular button on the right.
Features
- 1-Day Programmable: Allows for up to 4 time periods per day.
- Auto Changeover: Automatically switches between heating and cooling modes.
- Multi-Stage Compatibility: Supports 2-stage heat and 2-stage cool systems, including gas/electric, heat pump, electric, and hydronic heat.
- Backlit Display: Large, easy-to-read display with color-coded keys and legends.
- Configurable Operation: Can be set as programmable or non-programmable, and manual or auto changeover.
- LED Indicator: Glows green for cooling and red for heating.
- Temperature Display: Selectable between Fahrenheit (°F) and Celsius (°C).
- Non-Volatile Memory: Retains settings during power outages.
- Keypad Lock: Prevents unauthorized changes to settings.
Setup and Installation
Safety Precautions
- Turn off power to the heating and cooling system at the main circuit breaker before installation.
- Ensure all wiring is performed by a qualified technician if you are unsure.
- This thermostat is not suitable for 2-wire, heat-only applications.
Wiring Terminals
The thermostat features the following terminals for connection to your HVAC system:
- G: Fan relay
- Y1: Compressor Stage 1 (Cooling)
- Y2: Compressor Stage 2 (Cooling)
- W1/O/B: Heat Stage 1 (Conventional Heat) / Reversing Valve (Heat Pump)
- R: 24VAC Hot (Power)
- C: 24VAC Common
- W2: Heat Stage 2 (Conventional Heat)
- RS+5, RSGND: Remote Sensor connections (if applicable)
Refer to your HVAC system's manual for specific wiring diagrams. Connect wires from your existing thermostat to the corresponding terminals on the Venstar TSTATEZ.
Mounting
- Carefully remove the old thermostat from the wall.
- Mount the Venstar TSTATEZ backplate to the wall using the provided screws, ensuring it is level.
- Connect the wires to the appropriate terminals as described above.
- Attach the thermostat front panel to the backplate.
- Restore power to the HVAC system at the circuit breaker.
Operating Instructions
Basic Operation
The thermostat features a large display and intuitive up/down arrow buttons for temperature adjustment. The mode button (if present, or accessible via menu) allows selection of operating modes.
Mode Selection
Press the 'Mode' button (or navigate through menu options) to cycle through available operating modes:
- Heat: Thermostat controls heating only.
- Cool: Thermostat controls cooling only.
- Auto: Thermostat automatically switches between heating and cooling to maintain the set temperature range.
- Off: Heating and cooling systems are turned off.
Temperature Adjustment
Use the Up and Down arrow buttons to adjust the desired temperature setpoint.
Programming (1-Day)
The TSTATEZ offers 1-day programming with up to 4 time periods. Consult the full programming guide (often found in the advanced settings menu or a separate programming section) to set specific temperatures for different times of the day.
Keypad Lock
To prevent unauthorized changes, the keypad can be locked. Refer to the thermostat's on-screen menu or a dedicated button for instructions on enabling and disabling the keypad lock feature.
Fahrenheit/Celsius Selection
The temperature display can be switched between Fahrenheit and Celsius. This setting is typically found within the system configuration menu.
Maintenance
Your Venstar TSTATEZ thermostat requires minimal maintenance to ensure optimal performance.
- Cleaning: Gently wipe the thermostat's exterior with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Airflow: Ensure that the thermostat's vents are not obstructed by dust or debris, as this can affect temperature readings.
- Connections: Periodically check the wiring connections at the back of the thermostat to ensure they are secure. Turn off power before checking connections.
Troubleshooting
If you encounter issues with your thermostat, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No display or power | No power from HVAC system; tripped circuit breaker; loose wiring. | Check circuit breaker; ensure HVAC system is powered; verify wiring connections (R and C terminals). |
| Incorrect temperature reading | Thermostat location; obstructed vents; calibration issue. | Ensure thermostat is not in direct sunlight or near heat sources; clean vents; check for calibration settings in advanced menu. |
| System not heating/cooling | Incorrect mode selected; setpoint not met; HVAC system issue; loose wiring. | Verify mode (Heat/Cool/Auto); adjust setpoint; check HVAC unit for power/faults; inspect wiring. |
| Programming issues | Incorrect programming steps; keypad lock engaged. | Review programming instructions in the manual; disable keypad lock if active. |
If problems persist after attempting these solutions, contact a qualified HVAC technician or Venstar customer support.
Specifications
| Feature | Detail |
|---|---|
| Brand | Venstar |
| Model | TSTATEZ |
| Part Number | 7700312 |
| Item Model Number | CECOMINOD058037 |
| Controller Type | Push Button |
| Special Feature | Programmable (1-Day, 4 periods) |
| Power Source | Electric (24VAC from HVAC system) |
| Display Type | LED, Backlit |
| Control Type | Button Control |
| Mounting Type | Wall Mount |
| Product Dimensions | 6.25 x 4.63 x 2 inches |
| Item Weight | 10.7 ounces |
| Compatibility | 2-stage heat, 2-stage cool (Gas/Electric, Heat Pump, Electric & Hydronic Heat) |
| Terminals | G, Y1, Y2, W1/O/B, R, C, W2, RS+5, RSGND |
| Batteries Included | No |
Warranty and Support
For warranty information and technical support, please refer to the documentation included with your product packaging or visit the official Venstar website. Keep your proof of purchase for warranty claims.
