1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Mi-Heat Mi-300S RF Wireless Programmable Thermostat. Please read this manual carefully before installation and use to ensure proper function and safety. Keep this manual for future reference.
2. Safety Information
- Installation should be performed by a qualified electrician or heating technician.
- Always disconnect power to the heating system before installing or servicing the receiver unit.
- Do not expose the thermostat or receiver to water or excessive humidity.
- Ensure correct battery polarity when inserting batteries into the transmitter unit.
- Do not attempt to repair or modify the device yourself. Contact qualified personnel for service.
3. Package Contents
The Mi-Heat Mi-300S RF Wireless Programmable Thermostat kit includes the following components:
- 1x Mi-300S RF Wireless Thermostat (Transmitter)
- 1x Wireless Receiver Unit
- 1x Table Stand for Thermostat
- Mounting Material (screws, wall plugs)
- User Manual
Image 1: Mi-Heat Mi-300S RF Wireless Programmable Thermostat (left) and Receiver (right).
4. Product Overview
4.1. Thermostat (Transmitter) Features
- Large LCD display for clear temperature and time indication.
- Wireless communication at 433 MHz with a range of up to 20 meters.
- Daily and weekly programming with 4 adjustable switching times.
- Multiple operating modes: Comfort, Eco, and Holiday.
- Switchable between heating and cooling modes.
- Frost protection function.
- Battery-powered (2x AAA batteries).
Image 2: Key features of the Mi-300S RF Thermostat.
4.2. Thermostat Button Functions
Image 3: Front view of the thermostat with labeled buttons.
- On/Off Button: Powers the thermostat on or off.
- Heating & Cooling Option Button: Toggles between heating and cooling modes.
- Weekly Program Button: Accesses and sets weekly programming schedules.
- Mode Button: Cycles through Comfort, Eco, and Holiday modes.
- Temperature Adjustment Buttons (Up/Down): Adjusts the set temperature.
4.3. Receiver Unit Features
- Receives wireless signals from the thermostat.
- Potential-free switching contact with a maximum switching capacity of 7A.
- Mains-powered (230V/50Hz).
- Manual operation button for temporary control.
- Pairing button for establishing wireless connection.
- LED indicator for operational status.
Image 4: Receiver unit with labeled connections and buttons.
5. Setup
5.1. Thermostat Battery Installation
- Open the battery compartment on the back of the thermostat.
- Insert 2x AAA batteries, ensuring correct polarity (+/-).
- Close the battery compartment. The thermostat display should power on.
5.2. Receiver Wiring
WARNING: Disconnect main power supply before performing any wiring. Incorrect wiring can cause damage to the device or heating system and poses an electrical hazard.
The receiver unit connects to your heating system. The wiring configuration depends on your specific heating application (e.g., underfloor heating, boiler, electric heating).
Image 5: Example wiring diagrams for various heating systems.
- Power Supply: Connect the receiver to a 230V/50Hz mains power supply. Use the "Receiver Power Cable Input" terminals (L and N).
- Heating System Connection: Connect your heating device (e.g., boiler, actuator, electric heater) to the "Heating/Cooling Unit Connection Cable Input" terminals. This is a potential-free switching contact.
Consult a qualified electrician if you are unsure about the wiring process for your specific heating system.
5.3. Pairing the Thermostat and Receiver
The thermostat and receiver are typically pre-paired from the factory. If they are not communicating or if you are setting up a new unit, follow these steps:
- Ensure both the thermostat (with batteries) and the receiver (powered) are on.
- On the receiver unit, press and hold the Pairing Button (often marked with a link icon) until the LED indicator starts flashing.
- On the thermostat, access the pairing menu (refer to the specific instructions in your full manual for the exact button sequence, usually involving holding a mode or program button).
- Once pairing is successful, the receiver's LED will stop flashing and remain solid, or turn off, indicating a successful connection.
- Test the connection by adjusting the temperature on the thermostat and observing if the receiver activates the heating system.
Image 6: Wireless communication between the thermostat and receiver.
5.4. Mounting Options
The thermostat can be mounted in two ways:
- Wall Mounting: Use the provided mounting material (screws and wall plugs) to secure the thermostat to a wall at an appropriate height, away from direct sunlight or drafts.
- Table Stand: Place the thermostat on a flat surface using the included table stand. This allows for flexible placement within the wireless range.
Image 7: Illustration of the thermostat's wireless range and flexible placement.
6. Operating Instructions
6.1. Basic Operation
- Power On/Off: Press the On/Off button to turn the thermostat on or off.
- Temperature Adjustment: Use the Up/Down arrow buttons to manually set the desired temperature. The display will show the current room temperature and the set temperature.
6.2. Mode Selection
Press the Mode Button to cycle through the available operating modes:
- Comfort Mode: Maintains a higher, comfortable temperature.
- Eco Mode: Maintains a lower, energy-saving temperature.
- Holiday Mode: Sets a constant, usually lower, temperature for an extended period, overriding programmed schedules.
Press the Heating & Cooling Option Button to switch between heating and cooling functions, if your system supports both.
6.3. Programming Weekly Schedules
The Mi-300S RF allows for daily and weekly programming with up to 4 switching times per day. This feature helps optimize energy consumption by adjusting temperatures based on your schedule.
- Press the Weekly Program Button to enter programming mode.
- Use the Up/Down buttons to navigate through days (Monday-Sunday) and time slots (e.g., P1, P2, P3, P4).
- For each time slot, set the desired start time and target temperature using the adjustment buttons.
- Confirm each setting to move to the next.
- Exit programming mode by pressing the Weekly Program Button again or waiting for a timeout.
Refer to the detailed programming section in the complete user manual for specific steps and advanced options.
6.4. Frost Protection
The thermostat includes a frost protection feature. When activated, the thermostat will automatically turn on the heating if the room temperature drops below a pre-set minimum (typically around 5-7°C) to prevent pipes from freezing. This function is usually active in all modes, especially Holiday mode.
7. Maintenance
- Cleaning: Wipe the thermostat and receiver with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Battery Replacement: When the low battery indicator appears on the thermostat display, replace the 2x AAA batteries promptly to ensure continuous operation.
- Firmware Updates: There are no user-serviceable firmware updates for this device.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Thermostat display is blank. | Dead batteries. | Replace the 2x AAA batteries. |
| Heating system not responding to thermostat. | No power to receiver; Receiver not paired; Out of wireless range; Wiring issue. | Check receiver power; Re-pair thermostat and receiver; Move thermostat closer to receiver; Verify wiring connections. |
| Temperature readings seem inaccurate. | Thermostat placed in direct sunlight or near a heat source/draft. | Relocate the thermostat to a more central location, away from external influences. |
| Cannot set weekly program. | Incorrect button sequence; Thermostat in a different mode. | Refer to the "Programming Weekly Schedules" section or the full manual for detailed steps. Ensure the thermostat is in the correct mode for programming. |
9. Specifications
| Feature | Detail |
|---|---|
| Brand | Mi-Heat |
| Model Number | 1510-004 |
| Product Dimensions (Thermostat) | 12.5 x 8.5 x 2 cm (L x W x H) |
| Product Dimensions (Receiver) | 9 x 9 x 2.5 cm (L x W x H) |
| Thermostat Power Source | 2x AAA Batteries (3V) |
| Receiver Power Source | 230V / 50Hz (Mains Powered) |
| Connectivity Technology | RF (Radio Frequency) |
| RF Frequency | 433 MHz |
| Wireless Range | Up to 20 meters (unobstructed) |
| Switching Capacity (Receiver) | Max. 7A (Potential-free contact) |
| Special Features | Frost Protection, Weekly Programming, Heating/Cooling Mode |
| Material | Plastic |
| Item Weight | 400 grams (total kit) |
Image 8: Dimensions of the Mi-300S RF Thermostat.
Image 9: Dimensions of the Mi-300S RF Receiver.
10. Warranty and Support
This product comes with a standard manufacturer's warranty. For specific warranty terms and conditions, please refer to the documentation included with your purchase or contact Mi-Heat customer support.
For technical assistance, troubleshooting, or spare parts inquiries, please contact Mi-Heat customer service through their official channels. Information regarding spare parts availability is currently not provided.
