1. Introduction
The COMPUTHERM E400RF Wi-Fi thermostat is a wireless switching device designed for controlling heating and cooling systems. It can be managed remotely via the internet using a smartphone or tablet. This device offers easy connection to any two-wire room thermostat, gas boiler with a connection point, or any air conditioner or other electrical appliance, supporting both 24V and 230V control circuits.
The system comprises two main units: the thermostat (control unit) and the receiver unit, which directly controls the boiler or HVAC system. These units communicate wirelessly via radio frequency, eliminating the need for physical wiring between them. Both units are factory-coordinated and synchronized, each possessing a unique security code to ensure reliable operation.
2. Product Overview
The COMPUTHERM E400RF system includes a sleek, portable thermostat unit and a separate receiver unit. The thermostat features a clear display and touch buttons for local control, while the receiver unit handles the switching of your heating or cooling appliance.
3. Key Features
- Control Interface: Features intuitive touch buttons on the device, control via a dedicated smartphone application, and remote control capabilities.
- Portability: The thermostat unit can be freely moved within its operational range, offering flexibility in placement.
- Operating Modes: Supports both manual temperature setting and programmable scheduling modes.
- Heat Sensor Calibration: Allows for calibration of the temperature sensor to ensure accuracy.
- Multi-User Control: Designed to support control by multiple users.
- Defrost Function: Includes a defrost feature to prevent freezing in cold environments.
- Key Lock: Provides a key lock function to prevent unintended adjustments.
- Wireless Connectivity: Utilizes Wi-Fi for internet control and radio frequency for communication between thermostat and receiver.
4. Specifications
| Feature | Specification |
|---|---|
| Brand | COMPUTHERM |
| Model Number | E400RF |
| Color | White |
| Material | Plastic |
| Item Weight | 377 g |
| Temperature Measurement Range | 0 to 50 °C (in 0.1 °C increments) |
| Temperature Measurement Accuracy | ± 0.5 °C |
| Switching Sensitivity | ± 0.1 to ± 1.0 °C (in 0.1 °C increments) |
| Temperature Calibration Range | ± 3.0 °C (in 0.1 °C increments) |
| Power Supply (Thermostat) | USB-C 5V DC, 1A |
| Wireless Range (Open Air) | Approximately 250 m |
| Thermostat Dimensions (H x W x D with stand) | 130 x 23 x 92 mm |
| Switchable Current (Receiver) | 10 A (3 A inductive load) |
| Connectivity Technology | Wi-Fi |
| Components Included | Thermostat, Receiver Unit, Stand |
| Specific Uses | Heating and Cooling Systems |
5. Setup and Installation
5.1 Unpacking and Component Identification
Carefully unpack all components from the box. Ensure you have the thermostat unit, receiver unit, a stand for the thermostat, and a USB-C cable for power.
5.2 Thermostat Placement and Power
- Assemble the thermostat with its stand.
- Place the thermostat in a central location within the heated/cooled area, away from direct sunlight, drafts, or heat sources that could affect temperature readings.
- Connect the thermostat to a power source using the provided USB-C cable and adapter.
5.3 Receiver Unit Wiring
The receiver unit must be wired to your heating or cooling system. This typically involves connecting to a two-wire control circuit of a boiler, air conditioner, or other electrical device. Ensure the power supply matches the system's requirements (24V or 230V). It is recommended that wiring be performed by a qualified electrician.
5.4 Initial Pairing and Wi-Fi Connection
The thermostat and receiver units are factory-paired. If re-pairing is necessary, refer to the detailed instructions in the full user manual. To enable Wi-Fi control, download the COMPUTHERM smartphone application and follow the in-app instructions to connect your thermostat to your home Wi-Fi network.
6. Operating Instructions
6.1 Setting Temperature
- Via Touch Buttons: Use the up/down arrow buttons on the thermostat to adjust the desired set temperature. The display will show both the current room temperature and the set temperature.
- Via Smartphone App: Open the COMPUTHERM app on your smartphone or tablet. Navigate to your E400RF thermostat and adjust the temperature using the digital controls provided in the application.
6.2 Operating Modes
- Manual Mode: The thermostat maintains the set temperature until manually changed.
- Programmed Mode: Allows you to set a schedule for temperature changes throughout the day or week. Configure these programs through the smartphone application.
6.3 Advanced Functions
- Sensor Calibration: If you suspect the temperature reading is inaccurate, you can calibrate the sensor via the app or device settings.
- Defrost Function: This feature helps prevent pipes from freezing by activating heating if the temperature drops below a certain threshold.
- Key Lock: Activate the key lock to prevent accidental changes to settings, especially useful in households with children.
- Multi-User Access: Grant access to other family members or authorized users through the smartphone application.
7. Maintenance
The COMPUTHERM E400RF thermostat requires minimal maintenance. To ensure optimal performance and longevity:
- Cleaning: Gently wipe the thermostat's display and casing with a soft, dry cloth. Avoid using abrasive cleaners or solvents.
- Environment: Ensure the thermostat is not exposed to extreme temperatures, high humidity, or direct water contact.
- Firmware Updates: Periodically check the smartphone application for any available firmware updates for your thermostat to ensure you have the latest features and bug fixes.
8. Troubleshooting
If you encounter issues with your COMPUTHERM E400RF thermostat, consider the following troubleshooting steps:
- No Power to Thermostat: Ensure the USB-C cable is securely connected to both the thermostat and a working power adapter. Check the power outlet.
- No Power to Receiver/HVAC System Not Responding: Verify that the receiver unit is properly wired and receiving power. Check the circuit breaker for your heating/cooling system.
- No Wi-Fi Connection: Confirm your home Wi-Fi network is active and the thermostat is within range. Try restarting your Wi-Fi router. Re-establish the Wi-Fi connection through the COMPUTHERM app if necessary.
- Temperature Discrepancy: If the displayed temperature does not match another thermometer, perform a sensor calibration as described in the operating instructions.
- Thermostat and Receiver Not Communicating: Although factory-paired, environmental interference can sometimes affect communication. Ensure both units are within range (approx. 250m in open air, less indoors) and free from major obstructions. If issues persist, consult the full manual for re-pairing instructions.
9. Warranty Information
The COMPUTHERM E400RF thermostat typically comes with a 2-year warranty. Please retain your proof of purchase for warranty claims. For specific terms and conditions, refer to the warranty card included in your product packaging or contact the manufacturer/distributor.
Information regarding the availability of spare parts is currently unavailable.
10. Support
For further assistance, technical support, or detailed inquiries, please contact the manufacturer, COMPUTHERM, or the distributor, Calorsol GmbH. Contact information can usually be found on the product packaging, the official COMPUTHERM website, or within the smartphone application.
