1. Introduction
The Refoss MTS200 HomeKit Wi-Fi Smart Thermostat is designed to provide intelligent temperature control for your home's boiler or water underfloor heating system. With its touch screen interface, remote control via the Refoss app, and compatibility with voice assistants like Siri, Amazon Alexa, and Google Assistant, you can manage your home's heating with ease and efficiency. This manual provides comprehensive instructions for installation, operation, and maintenance to ensure optimal performance and comfort.
Video: Refoss Smart Thermostat Product Overview
2. Product Features
- Easy to Use: Simple installation and control via the free Refoss app, voice assistants, or manual touch screen. No hub required for 2.4Ghz Wi-Fi connection.
- Energy Saving: Set a 7-day automatic heating schedule to optimize energy consumption, potentially saving up to 30% on heating costs.
- Precise Temperature Sensing: Features a dual-sensing system with an internal sensor for ambient air temperature and an external sensor wire (optional installation) for floor temperature, ensuring accuracy of ±0.5°C.
- LED Touch Display: Pure white LED backlight display, more energy-efficient than traditional LCD screens, with an elegant glass panel design.
- Child Lock: Prevents unintended operation by children.
- Memory Function: Retains settings even after a power failure.
- Open Window Detection: Automatically stops heating when an open window is detected to prevent energy waste.
- Additional Features: Includes outdoor temperature statistics, frost protection, adjustable screen brightness, and floor overheating protection.
Image: Refoss Smart Thermostat with Mobile App Interface
Image: Compatibility with Boiler and Water Underfloor Heating Systems
Image: Dual Sensing System for Precise Temperature
Image: Remote Control via Refoss App
Image: Voice Control with Siri, Alexa, Google Assistant
Image: 7/24 Automatic Heating Schedule
Image: Works with Apple Home
Image: Open Window Detection
3. Specifications
| Feature | Detail |
|---|---|
| Model Number | MTS200 |
| Power Source | AC (100-250V~, 50/60Hz) |
| Output Current (Boiler/Water Underfloor Heating) | 3A maximum load |
| Set Point Range | 5~35°C |
| Accuracy | ±0.5 °C |
| Dimensions | 86 x 86 x 42 mm |
| Power Consumption | < 1 Watt |
| Communication Method | Wi-Fi (2.4Ghz only) |
| Wireless Communication Included | Yes |
| Battery Included | No |
| Inbox Adaptor | No |
| Certifications | CE, FCC, RoHS |
| Package Weight | 0.3 kg |
| Package Dimensions | 20 x 10 x 15 cm (Length x Width x Height) |
4. Setup and Installation
Important Safety Information: Installation should be performed by a qualified electrician or heating engineer to ensure safety and compliance with local regulations. Always turn off the main power supply before beginning any wiring work.
- Unpack: Carefully remove the thermostat and all components from the packaging.
- Mounting: Choose a suitable location on an interior wall, away from direct sunlight, drafts, or heat sources, which could affect temperature readings.
- Wiring: Connect the thermostat to your boiler or water underfloor heating system according to the wiring diagrams provided below. Ensure all connections are secure.
- For Gas Boiler Heating (3A): Connect the Live (L) and Neutral (N) power supply to terminals 1 and 2. Connect the boiler control wires to NO (Normally Open) and COM (Common) terminals 4 and 5.
- For Water Underfloor Heating (3A): Connect the Live (L) and Neutral (N) power supply to terminals 1 and 2. Connect the thermal actuator control wires to NO (Normally Open) and COM (Common) terminals 4 and 5. This system supports both 2-wire and 3-wire actuators.
- External Sensor (Optional): If using an external sensor for floor temperature, connect it to terminals 6 and 7.
- Power On: Once wiring is complete and secure, restore power to the system.
- Wi-Fi Connection: Follow the on-screen prompts or the Refoss app instructions to connect your thermostat to your 2.4Ghz Wi-Fi network.
Image: Wiring Diagram for Boiler and Water Underfloor Heating
5. Operating Instructions
5.1 Manual Control
The thermostat features a touch screen for direct control. Use the up and down arrows to adjust the target temperature. The mode button allows you to switch between manual, automatic, and other available modes.
5.2 App Control (Refoss App)
Download the free "Refoss app" from your device's app store. Once installed and your thermostat is connected to Wi-Fi:
- Open the Refoss app and log in or create an account.
- Add your MTS200 thermostat by following the in-app instructions.
- You can now remotely monitor and adjust the temperature, set schedules, and access all smart features from anywhere with an internet connection.
5.3 Voice Control
The Refoss MTS200 is compatible with Apple HomeKit (Siri), Amazon Alexa, and Google Assistant. Ensure your thermostat is linked to your preferred smart home platform through the Refoss app settings.
- Siri (Apple HomeKit): "Hey Siri, set the living room temperature to 22 degrees."
- Alexa: "Alexa, set the thermostat to 21 degrees."
- Google Assistant: "Hey Google, turn up the heat."
5.4 Scheduling
Utilize the Refoss app to create a 7-day heating schedule. You can set different temperature points for up to 6 time-modes daily, optimizing comfort and energy savings. The thermostat will automatically adjust the temperature based on your programmed schedule.
5.5 Special Features
- Child Lock: Activate this feature in the app or on the device to prevent unauthorized changes to settings.
- Open Window Detection: When the thermostat detects a sudden drop in temperature (indicating an open window), it will temporarily stop heating to save energy. This feature can be enabled/disabled in the app.
- Frost Protection: Maintains a minimum temperature to prevent pipes from freezing.
- Screen Brightness: Adjust the display brightness via the app settings.
6. Maintenance
- Cleaning: Wipe the thermostat's screen and casing with a soft, dry cloth. Do not use abrasive cleaners or solvents, as they may damage the surface.
- Sensor Check: Periodically ensure that the internal and external (if installed) temperature sensors are free from dust or obstructions that could affect accurate readings.
- Software Updates: Keep the Refoss app updated to the latest version to ensure optimal performance and access to new features. Firmware updates for the thermostat may also be available through the app.
7. Troubleshooting
Common Issues and Solutions:
- Thermostat not turning on: Check the main power supply and ensure all wiring connections are secure according to the installation instructions.
- Temperature readings seem inaccurate: Ensure the thermostat is not exposed to direct sunlight, drafts, or heat sources. If an external sensor is used, check its placement and connection. Consider recalibrating the temperature in the app settings if necessary.
- Cannot connect to Wi-Fi: Ensure your Wi-Fi network is 2.4Ghz. Verify your Wi-Fi password and router settings. Try restarting your router and the thermostat.
- Voice control not working: Confirm that the thermostat is properly linked to your Apple HomeKit, Amazon Alexa, or Google Assistant account through the Refoss app. Check your internet connection and the voice assistant device.
- Heating system not responding: Verify the thermostat's wiring to the boiler/underfloor heating system. Ensure the system itself is operational.
Compatibility Questions:
- Is it compatible with specific boiler models (e.g., Baxi Eco 3, old generation boilers)? The Refoss MTS200 is designed for standard boiler and water underfloor heating systems with a 3A maximum load. For specific boiler models, consult your boiler's manual for compatibility with external thermostats or contact Refoss support with your boiler's specifications.
- Can it be used for hydro pellet stoves? The thermostat is primarily designed for boiler and water underfloor heating systems. Compatibility with hydro pellet stoves may vary depending on the stove's control interface. Please verify if your stove provides standard thermostat connections.
- Can I use it to control an apartment air conditioner? No, this thermostat is specifically designed for heating systems (boiler/water underfloor heating) and does not support air conditioning control.
- Can I use it to adjust warm floor heating? Yes, the Refoss MTS200 is fully compatible with water underfloor heating systems.
8. User Tips
- Optimize Energy Savings: Take advantage of the 7-day programmable schedule feature. Set lower temperatures when you are away or asleep and higher temperatures during active hours to maximize energy efficiency.
- Utilize Dual Sensing: If your setup allows, install and configure the external sensor for floor temperature. This can provide more precise and comfortable heating, especially for underfloor systems.
- HomeKit Integration: For Apple users, setting up a HomePod, HomePod mini, Apple TV, or iPad as a home hub enables remote control of your HomeKit accessories, including the Refoss thermostat, even when you're away from home.
9. Warranty and Support
Refoss provides a 2-year warranty for the MTS200 Smart Thermostat, ensuring peace of mind regarding product quality and performance. Additionally, we offer lifelong after-sales support to assist you with any questions or issues you may encounter.
Contact Support:
For technical assistance, troubleshooting, or warranty claims, please contact our support team:
- Email: support@refoss.net
Image: Refoss Support and Certifications
