Mi-Heat E51

Mi-Heat E51 Digital Room Thermostat User Manual

Malli: E51

Brand: Mi-Heat

1. Johdanto

The Mi-Heat E51 digital room thermostat is designed for precise temperature control of electric and water-based underfloor heating systems. It features a backlit display, a 7-day weekly programming function, and frost protection. The thermostat utilizes both an internal room sensor and an external floor sensor to maintain your desired temperature, ensuring comfort and energy efficiency.

Tärkeimmät ominaisuudet:

Taustavalaistu LCD-näyttö
Weekly Programmable (5/2, 6/1, or 7-day modes)
Integrated Room Sensor and External Floor Sensor
Display Calibration/Offset Function
Jäätymissuojatoiminto
Key Lock / Child Lock

2. Turvallisuustiedot

Asennuksen saa suorittaa vain pätevä sähköasentaja paikallisten johdotusmääräysten mukaisesti.
Always disconnect power at the main circuit breaker before installation, maintenance, or removal of the thermostat.
Do not expose the thermostat to moisture or extreme temperatures.
Varmista, että kaikki liitännät ovat kunnolla kiinni sähköiskujen välttämiseksi.
Tämä laite on suunniteltu vain sisäkäyttöön.

3. Pakkauksen sisältö

Varmista, että pakkauksessa on kaikki tarvittavat osat:

Mi-Heat E51 Room Thermostat
External Floor Sensor (NTC 10 kOhm with 2m lead)
Kiinnitysruuvit
Käyttöopas

Mi-Heat E51 Thermostat package contents including thermostat, floor sensor, screws, and manual — Figure 3.1: Mi-Heat E51 Thermostat and included accessories. The image shows the white thermostat unit, a coiled white floor sensor cable, two mounting screws, and a small instruction manual.

4. Tekniset tiedot

Ominaisuus	Erittely
Asennustyyppi	Uppoasennettu
Versio	Langallinen
Käyttö Voltage	230 V
Max. Kytkentävirta	16A / 3680W
Ohjaustyyppi	Two-point control ON/OFF
Käyttölämpötila	5-50 °C
Anturi	Internal and external, NTC with 2m lead
Temperature Control Range (Internal)	0-55°C (Room sensor)
Temperature Control Range (External)	5-55°C (Floor sensor)
Jäätymissuoja	Kyllä
Floor Limit Range	5-50 °C
Näyttö/taustavalo	Kyllä/Kyllä
Protection Class IP	IP21
Mitat (LxKxS)	80x90x13 / 43mm

5. Asennus

The Mi-Heat E51 thermostat is designed for flush-mounted installation in standard wall boxes. Ensure power is disconnected before proceeding.

5.1. Mitat

Mi-Heat E51 Thermostat dimensions and cable length — Figure 5.1: Detailed measurements of the Mi-Heat E51 thermostat and its components. The image shows the front view (8.6 cm width, 9 cm height, 6.5 cm display), side view (1.3 cm depth from wall, 4.3 cm total depth), and back view (5 cm width, 5 cm height for mounting). It also indicates the 3m length of the external floor sensor cable.

5.2. Johdotus

Refer to the wiring diagram below for proper connection. The thermostat supports both electric underfloor heating and water-based underfloor heating (via an actuator).

Mi-Heat E51 Thermostat wiring diagram for electric and water-based heating — Figure 5.2: Wiring diagram for the Mi-Heat E51 thermostat. The diagram illustrates connections for electric underfloor heating (top) and water-based underfloor heating with an actuator (bottom). It shows L (Live) and N (Neutral) inputs, and outputs for the heating element or actuator, along with the floor sensor connection.

Kytkentävaiheet:

Varmista, että virta on katkaistu päävirtakatkaisimesta.
Connect the Live (L) and Neutral (N) power supply wires to the corresponding terminals on the thermostat.
Connect the heating element or actuator wires to the designated output terminals.
Connect the external floor sensor cable to the sensor terminals.
Carefully place the thermostat into the wall box and secure it with the provided screws.
Palauta virta ja testaa termostaatti.

Takaisin view of Mi-Heat E51 Thermostat showing connection terminals — Kuva 5.3: Takaosa view of the Mi-Heat E51 thermostat, showing the terminal block for electrical connections. The image highlights the various connection points for power input, heating output, and sensor input.

6. Käyttö

The Mi-Heat E51 thermostat features an intuitive interface with a backlit LCD display and several control buttons.

6.1. Display and Buttons Overview

Mi-Heat E51 Thermostat display and button functions — Kuva 6.1: Päättynytview of the Mi-Heat E51 thermostat display and button functions. Labels indicate the room temperature, set temperature, weekday, heating status, key lock, selection button, value increase/decrease buttons, and On/Off button.

Painikkeiden toiminnot:

Selection Button (Book icon): Used to enter menu, confirm settings, or switch modes.
Increase Value Button (Up arrow): Used to increase temperature, time, or navigate menu options.
Decrease Value Button (Down arrow): Used to decrease temperature, time, or navigate menu options.
On/Off Button (Power icon): Kytkee termostaatin päälle tai pois päältä.

6.2. Peruskäyttö

Virta päälle/pois: Press the Power button to turn the thermostat on or off.
Lämpötilan säätö: When the thermostat is on, use the Up/Down arrow buttons to adjust the desired set temperature.
Key Lock / Child Lock: To activate or deactivate the key lock, press and hold the Selection button for a few seconds until the key icon appears/disappears on the display.

6.3. Viikko-ohjelmointi

The thermostat allows for 7-day weekly programming with options for 5/2 (weekday/weekend), 6/1 (6 days/1 day), or 7-day individual programming. This feature enables you to set different temperatures for various times of the day across the week.

Mi-Heat E51 Thermostat weekly programming example — Kuva 6.2: Esimample of a 5+2 weekly program for the Mi-Heat E51 thermostat. The table shows programmed events and corresponding temperatures for Monday-Friday and Saturday-Sunday, with multiple time slots per day.

Viikko-ohjelman asettaminen:

Press and hold the Selection button to enter the programming menu.
Use the Up/Down arrows to navigate through the programming options (e.g., 5/2, 6/1, 7-day mode, time settings, temperature settings for each event).
Press the Selection button to confirm each setting and move to the next.
Toista kaikille halutuille ajanjaksoille ja päiville.
Exit the menu by pressing the Selection button until the main display reappears, or wait for it to time out.

6.4. Frost Protection Function

The frost protection function prevents the temperature from dropping below a set minimum (typically 5°C) to protect pipes and the heating system from freezing. This function is active when the thermostat is in standby or when specifically enabled in the settings.

Mi-Heat E51 Thermostat features overview — Kuva 6.3: Päättynytview of key features including Frost Protection, Key Lock, Weekly Programming, and Actual/Set Temperature Display. The image also indicates compatibility with both electric and water-based underfloor heating.

7. Huolto

The Mi-Heat E51 thermostat requires minimal maintenance.

Puhdistus: Pyyhi näyttö ja casing pehmeällä, kuivalla liinalla. Älä käytä hankaavia puhdistusaineita, liuottimia tai kemiallisia suihkeita, sillä ne voivat vahingoittaa pintaa.
Tarkastus: Periodically check the thermostat for any visible damage or loose connections. If any issues are found, disconnect power and consult a qualified technician.

8. Vianmääritys

Ongelma	Mahdollinen syy	Ratkaisu
Termostaatti ei käynnisty	No power supply; Loose wiring; Blown fuse/tripped breaker	Check main power supply; Verify wiring connections; Check and reset circuit breaker/replace fuse.
Lämmitys ei käynnisty	Set temperature is below room/floor temperature; Thermostat in OFF mode; Wiring issue	Increase set temperature; Ensure thermostat is ON; Check wiring connections to heating system.
Epätarkka lämpötilalukema	Sensor malfunction; Incorrect sensor type selected; Thermostat placed near heat source/draft	Check sensor connection; Verify sensor type in settings; Relocate thermostat if possible or use calibration function.
Näyttö ei toimi tai vilkkuu	Power fluctuation; Internal fault	Cycle power to the thermostat; If problem persists, contact support.
Cannot change settings (Key Lock active)	Key Lock / Child Lock is enabled	Press and hold the Selection button until the key icon disappears to deactivate the lock.

9. Takuu ja tuki

For support or inquiries regarding your Mi-Heat E51 thermostat, please contact us Monday - Friday from 09:00 to 16:00. We offer support and shipping directly from Germany.

Refer to your purchase documentation or retailer for specific warranty details and terms.

Ask a question about this manual

Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.