1. Product Overview
The Rti-Tek T5Z/T5W is a battery-powered smart thermostat designed for controlling gas boilers or water floor heating systems. It offers intelligent temperature management, energy-saving features, and smart home integration through Tuya Smart Life app, Amazon Alexa, and Google Assistant.

Figure 1: Rti-Tek Smart Thermostat with app and voice assistant compatibility.
Video 1: Product overview and basic operation of the Rti-Tek Smart Thermostat.
2. Setup Guide
2.1. Battery Installation
The thermostat is powered by 2 x 1.5V alkaline AA batteries. To install:
- Gently remove the front cover of the thermostat.
- Insert two AA batteries into the designated slots, ensuring correct polarity (+/-).
- Replace the front cover.

Figure 2: Battery compartment for the thermostat.
2.2. Mounting
The thermostat supports both wall mount and desktop installation. For wall mounting, ensure proper wiring is completed before securing the device to the wall.
2.3. Wiring Diagrams
The thermostat is compatible with gas boilers and valve actuators. Refer to the diagrams below for correct wiring. Always ensure power is disconnected before performing any wiring.

Figure 3: Wiring for Water Gas Boiler (top) and Valve Actuator (bottom). Output for boiler is potential-free, output for thermal actuator/electric heating product uses N and L terminals.
2.4. App Installation and Pairing
The thermostat works with the Tuya Smart or Smart Life app.
- Download the 'Tuya Smart' or 'Smart Life' app from your smartphone's app store.
- Register or log in to your account.
- For T5Z (Zigbee version): A Zigbee gateway is required. Plug in and set up your Zigbee gateway according to its instructions.
- Open the app, tap '+' to add a new device, and follow the on-screen instructions to pair your thermostat.

Figure 4: Smart Phone Control setup with Zigbee Gateway.

Figure 5: Overall control logic for the smart thermostat system.
3. Operating Instructions
3.1. Interface and Buttons
The thermostat features a clear display and user-friendly mechanical buttons for easy control.

Figure 6: Thermostat Interface and Buttons. Key functions include: Networking icon, Battery power, Sensing Temp., Room Sensor, Floor Sensor, Frost Protection, Heat on, Temporary Mode, Manual Mode, Auto Mode, Setpoint Temp., Plus key, Mode key, Power key, Minus key, Time key, Week Display, Time Display, Child-lock, Wake up/Leave/Return/Sleep events.
3.2. Operating Modes
The thermostat offers multiple operating modes:
- Auto Mode: Follows the programmed weekly schedule.
- Manual Mode: Allows you to set a constant temperature manually.
- Programmable Temporary Mode: Temporarily overrides the auto mode until the next scheduled event.

Figure 7: Visual representation of the thermostat's operating modes.
3.3. Weekly Programming
You can set a customized temperature plan for 5+2, 6+1, or 7 days a week, with up to 6 heating events per day. Use the 'Mode' and '+/-' keys to navigate and adjust settings.

Figure 8: Example of a weekly programmable schedule.
3.4. Child Lock Function
To prevent accidental changes or misuse by children, activate the child lock. Press and hold the '+' and '-' buttons simultaneously for 3 seconds to activate/deactivate.

Figure 9: Child lock activation.
3.5. Frost Protection Function
When activated, this function automatically turns on the heating for a short period if the room temperature drops below a set threshold, preventing water pipes from freezing or bursting.

Figure 10: Frost Protect Function can be enabled via the app.
3.6. Voice Control
The thermostat supports voice control via Amazon Alexa, Google Assistant, and Yandex Alice. Link your Tuya Smart/Smart Life account to your voice assistant app and use commands like "Ok Google, set the HEATER to 15 degree."

Figure 11: Voice control integration with smart speakers.
4. Maintenance
4.1. Battery Replacement
When the battery indicator on the display shows low power, replace the AA batteries promptly to ensure continuous operation. Follow the steps in Section 2.1 for battery installation.
4.2. Cleaning
Wipe the thermostat's surface with a soft, dry cloth. Do not use abrasive cleaners or solvents, as they may damage the device.
5. Troubleshooting
If you encounter issues with your thermostat, consider the following common solutions:
- No Display/Power: Check if batteries are correctly inserted and have sufficient charge. Replace if necessary.
- No Network Connection: Ensure your Zigbee gateway (for T5Z) or Wi-Fi router (for T5W) is powered on and functioning correctly. Check the app for connection status and try re-pairing if needed.
- Incorrect Temperature Readings: Ensure the thermostat is not exposed to direct sunlight, drafts, or heat sources that could affect its internal sensor.
- Heating Not Activating: Verify that the thermostat is in a heating mode (Auto or Manual) and the setpoint temperature is above the current room temperature. Check wiring connections to the boiler/actuator.
For more detailed troubleshooting, please refer to the full user manual available in PDF format: User Manual (PDF).
6. Specifications
| Feature | Specification |
|---|---|
| Brand Name | Rti-Tek |
| Model Number | T5Z (Zigbee), T5W (Wifi) |
| Product Type | Tuya Zigbee Thermostat Smart |
| Power Supply | 2 x 1.5 V alkaline AA batteries |
| APP Compatibility | Tuya Smart/Smart Life |
| Voice Control | Amazon Alexa / Google Home / Alice |
| Suitable for | Gas Boiler/ Water Floor Heating System |
| Current Load | 3A |
| Installation | Wall mount or Desktop Type |
| Temp. Setting Range | 5~35°C (5~95°C for Temp. setting range) |
| Temp. Difference | 0.5-10°C, Factory setting 1°C |
| Ambient Temperature | -5 to 50°C |
| Temperature Setting Accuracy | 0.5°C |
| Protection Level | IP20 |
| Shell Material | Anti-Flammable PC |
| Functions | Intelligent Power Failure Memory, Humidity & Weather Display |
| Certification | CE, RoHS |
6.1. Dimensions

Figure 12: Thermostat dimensions (Unit: mm). Width: 86mm, Height: 90mm, Depth: 20.8mm (from wall), 60mm (mounting base).
7. User Tips
- Optimal Placement: Install the thermostat away from direct sunlight, heat sources, or drafts to ensure accurate temperature readings.
- Energy Saving: Utilize the weekly programming feature to set different temperatures for various times of the day and week, optimizing comfort and energy consumption.
- Remote Access: Leverage the Tuya Smart/Smart Life app for remote control and monitoring of your heating system, even when you're away from home.
- Thermostat Measurements: The thermostat measures approximately 86mm (width) x 90mm (height) x 20.8mm (depth from wall).
8. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the official Rti-Tek website or contact your point of purchase. Always retain your proof of purchase for warranty claims.
For comprehensive details and additional support, please consult the full user manual available in PDF format: User Manual (PDF).