1. Johdanto
This manual provides detailed instructions for the installation, setup, operation, and maintenance of your Meross MTS215B Smart Wi-Fi Matter Thermostat. Please read this manual thoroughly before installation and use to ensure proper functionality and safety. Keep this manual for future reference.
2. Tuote ohiview
The Meross MTS215B is a smart thermostat designed for boiler and water-based underfloor heating systems. It offers precise temperature control, energy-saving features, and seamless integration with various smart home platforms.

Figure 2.1: Meross MTS215B Smart Wi-Fi Matter Thermostat (White Matter variant)
Tärkeimmät ominaisuudet:
- Wi-Fi-yhteys: Connects directly to your home network without a separate hub.
- Matter-protokollan tuki: Compatible with Alexa, Google Assistant, Siri, and other Matter-enabled platforms.
- Energiansäästö: Features open window detection to automatically pause heating and prevent energy waste.
- Tarkka ohjaus: Supports optional external sensors for accurate temperature measurement in specific zones.
- Consumption Analysis: Monitor temperature curves, operating times, and energy consumption via the Meross app.
- Family Comfort & Safety: Includes child lock, power outage memory, silent buttons, adjustable brightness, and a minimal display mode.
3. Yhteensopivuus
The Meross MTS215B thermostat is designed for specific heating systems. Please verify compatibility before installation.

Figure 3.1: The thermostat is compatible with boiler and water-based underfloor heating systems. It is NOT compatible with electric heating systems.
Smart Home -yhteensopivuus:
The thermostat supports the Matter protocol and is compatible with:
- Apple HomeKit (Siri)
- Amazon Alexa
- Google Assistant
- SmartThings
Yhteensopivuuden tarkistus:
Before purchase, scan the QR code below or visit the provided link to verify compatibility with your specific heating system.

Figure 3.2: Scan this QR code to check compatibility.
Vaihtoehtoisesti vieraile: https://www.meross.com/en-gc/compatibility-check/mts205b-eu
4. Asennus
The thermostat requires wall-mounted installation and does not support battery power. Professional installation by a qualified electrician is recommended due to 230V wiring.
Johdotusvaatimukset:
Phase and Neutral wires are required for operation. You will need at least 4 wires for boiler systems and 3 wires for underfloor heating systems.

Figure 4.1: Wiring diagram showing Phase (brown) and Neutral (blue) connections. Minimum box dimensions: Height > 50.5mm, Width > 50.5mm, Depth > 32mm.
503 Box Compatibility:
If your electrical box is a type 503, the thermostat might not fully cover the opening. For a neat installation, Meross wall plates for 503 boxes are recommended to ensure a perfect fit without gaps.

Figure 4.2: Optional Meross wall plate for 503 electrical boxes.
5. Asennus
After physical installation, set up your thermostat using the Meross app and integrate it with your preferred smart home ecosystem.
Meross App Setup:
- Lataa Meross-sovellus App Storesta tai Google Playsta.
- Luo tili tai kirjaudu sisään.
- Follow the in-app instructions to add your MTS215B thermostat.
Älykkään kodin integrointi:
The Meross MTS215B supports Matter, allowing easy integration with major smart home platforms.

Figure 5.1: Control your thermostat with voice commands via Alexa, Siri, or Google Assistant, or remotely through the Meross app.
- Apple HomeKit: Use the QR code on the device or packaging to add it to the Home app.
- Amazon Alexa/Google Assistant: Link your Meross account in the Alexa or Google Home app.
6. Käyttö
The Meross MTS215B offers various features for efficient and comfortable heating control.
Ajoitus:
Create custom heating schedules through the Meross app to automatically adjust temperatures based on your daily routine.

Figure 6.1: Program your heating schedule using the Meross app.
Avoimen ikkunan tunnistus:
The thermostat can detect a sudden drop in temperature (e.g., ≥2°C in 15 minutes) indicating an open window and will automatically pause heating to save energy.

Figure 6.2: The thermostat detects open windows and temporarily stops heating.
Näyttö ja säätimet:
- Säädettävä kirkkaus: The LED display brightness can be adjusted for both active and standby modes.
- Lapsilukko: Activate the child lock feature to prevent unauthorized changes to settings.
- Hiljaiset painikkeet: Touch controls operate silently.

Figure 6.3: Features include a glass panel, child lock, silent buttons, and temperature calibration via app.
Ulkoisten anturien tuki:
The thermostat supports external sensors for more precise temperature readings in specific areas, such as bathrooms or sensitive floor heating zones.

Figure 6.4: The thermostat can connect to an external sensor for enhanced temperature accuracy.
Energianvalvonta:
The Meross app provides intelligent consumption analysis, displaying temperature curves, operating times, and estimated heating costs.

Figure 6.5: Monitor your heating data and estimated costs through the Meross app.
7. Huolto
To ensure optimal performance and longevity of your Meross MTS215B thermostat, follow these simple maintenance guidelines:
- Puhdistus: Gently wipe the display and body with a soft, dry cloth. Do not use abrasive cleaners, solvents, or chemical sprays.
- Vältä kosteutta: Keep the thermostat dry and away from excessive humidity.
- Tehosykli: If the device becomes unresponsive, temporarily disconnect power at the circuit breaker for a few minutes, then restore power.
8. Vianmääritys
If you encounter issues with your Meross MTS215B thermostat, refer to the following common problems and solutions:
| Ongelma | Mahdollinen syy | Ratkaisu |
|---|---|---|
| Display segments are broken or unreadable. | Hardware defect, manufacturing issue. | Contact Meross customer support for assistance or replacement. |
| Termostaatti ei muodosta yhteyttä Wi-Fi-verkkoon. | Incorrect Wi-Fi password, 5GHz network, weak signal, router issues. | Ensure you are connecting to a 2.4GHz Wi-Fi network. Verify password. Move thermostat closer to router or check router settings. Restart router. |
| Epätarkat lämpötilalukemat. | Sensor calibration needed, external factors affecting local temperature. | Use the Meross app to calibrate the temperature offset. Ensure the thermostat is not exposed to direct sunlight or drafts. Consider using an optional external sensor for critical areas. |
| Lämmitys ei kytkeydy päälle/pois aikataulun mukaisesti. | Incorrect schedule settings, open window detection active, wiring issue. | Review your schedule in the Meross app. Check if open window detection is active. Verify wiring connections. |
| Thermostat unresponsive. | Power interruption, software glitch. | Check power supply. Perform a power cycle by turning off the circuit breaker for a few minutes and then turning it back on. |
9. Tekniset tiedot
| Erittely | Yksityiskohta |
|---|---|
| Merkki | meros |
| Mallin nimi | Matter termostaatti |
| Mallinumero | MTS215B |
| Tuotteen mitat | 3.2 S x 8.6 L x 8.6 K cm |
| Tuotteen paino | 145 grammaa |
| Yhteystekniikka | Wi-Fi (2.4 GHz) |
| Virtalähde | Johdollinen sähkö |
| Voitage | 240 volttia |
| Sähköteho | 5 wattia |
| Näytön tyyppi | LED |
| Valvontamenetelmä | Touch, Voice (via smart assistants) |
| Asennustyyppi | Seinäteline |
| Erikoisominaisuudet | Automatic Programming, Open Window Detection, Child Lock, Adjustable Brightness |
| Mukana olevat komponentit | Mounting bracket, control button, external sensor (optional), wiring adhesive, user manual |
10. Takuu ja tuki
Meross products typically come with a manufacturer's warranty. For specific warranty details, please refer to the documentation included with your product or visit the official Meross websivusto.
If you experience any issues or have questions regarding your Meross MTS215B Smart Wi-Fi Matter Thermostat, please contact Meross customer support. Many users have reported excellent and responsive support from Meross.
You can often find support contact information on the Meross websivustolla tai Meross-sovelluksessa.







