1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Sodeca Unirec-50-S High-Efficiency Monozone Heat Recovery Unit. Please read this manual thoroughly before using the product and retain it for future reference.
The Sodeca Unirec-50-S is designed to improve indoor air quality by renovating air within your home while minimizing energy loss. It achieves this by recovering heat from outgoing air and transferring it to incoming fresh air, which is filtered to prevent the entry of external particles.
2. Product Overview
The Sodeca Unirec-50-S is a compact and efficient monozone heat recovery unit. Key features include:
- Reversible EC Fan: Ensures efficient air movement in both supply and extraction modes.
- High Thermal Efficiency: Achieves up to 90% thermal efficiency, reducing heating and cooling costs.
- G3 Filters: Equipped with G3 filters to ensure clean incoming air by preventing dust and particles.
- Compact Ceramic Exchanger: Facilitates efficient heat transfer.
- Telescopic Duct: Allows for easy installation and adaptation to various wall thicknesses (120 mm to 470 mm).
- Automatic Air Inlet Grille: Closes automatically when the unit is off to prevent air leaks.
- 70-Second Recovery Cycle: Alternates between air supply and extraction every 70 seconds for continuous air renovation.

Figure 1: Sodeca Unirec-50-S High-Efficiency Monozone Heat Recovery Unit. This image shows the compact, rectangular unit with two circular duct connections on one side, and the Sodeca brand name visible on the front panel. The top surface appears to have a textured, dark grey section.
3. Safety Information
Always observe the following safety precautions to prevent injury and damage to the unit:
- Ensure the unit is installed by a qualified professional in accordance with local electrical and building codes.
- Disconnect power before performing any maintenance or cleaning.
- Do not block air inlets or outlets.
- Keep children and pets away from the unit during operation.
- Do not operate the unit if any part is damaged. Contact customer support for repairs.
- This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
4. Installation
The Unirec-50-S unit is designed for straightforward installation. It features a telescopic duct that accommodates wall thicknesses from 120 mm to 470 mm.
4.1. Site Selection
- Choose a location on an exterior wall that allows for proper air intake and exhaust, away from obstructions.
- Ensure adequate space around the unit for maintenance and filter replacement.
4.2. Mounting and Ducting
- Drill a suitable opening through the wall, ensuring it is level and correctly sized for the unit's duct.
- Insert the telescopic duct through the wall opening and adjust its length to match the wall thickness.
- Secure the main unit to the interior wall using appropriate fasteners.
- Install the exterior grille, ensuring a weather-tight seal.
4.3. Electrical Connection
- The unit operates on 100V to 230V, 50/60Hz power. It comes with an integrated power cable.
- Connect the unit to a dedicated power supply circuit as per local electrical regulations.
- Ensure the power supply is switched off before making any electrical connections.
5. Operation
The Unirec-50-S can be controlled via its integrated dashboard or the provided remote control.
5.1. Control Panel and Remote Control
The control panel on the unit and the remote control allow you to select various operating modes and settings.
5.2. Operating Modes
- Recovery Mode: The standard operating mode, where the unit alternates between supplying fresh, pre-heated air and extracting stale air, recovering heat in the process. This cycle typically lasts 70 seconds for each direction.
- Extraction Mode: The unit continuously extracts air from the room without heat recovery. Useful for rapid removal of odors or excess humidity.
- Pulse Mode: Provides intermittent ventilation.
- Natural Mode: The air inlet grille opens, and the fan stops. This mode allows for natural ventilation without mechanical assistance.
5.3. Speed Settings
The unit offers two fan speeds to adjust the airflow rate according to your needs.
5.4. Humidity Control
The unit includes a humidity control function to help manage indoor humidity levels.
5.5. Network Connection
Multiple Unirec-50-S units can be connected in a network for synchronized operation across different rooms or zones.
6. Maintenance
Regular maintenance ensures optimal performance and longevity of your heat recovery unit.
6.1. Filter Cleaning and Replacement
- The unit is equipped with G3 filters. These filters should be inspected and cleaned regularly (e.g., monthly) or replaced as needed.
- To access the filters, disconnect power to the unit and follow the instructions for opening the unit's casing.
- Clean filters with a vacuum cleaner or wash them gently with water and mild detergent. Ensure they are completely dry before reinstallation.
- Replace filters if they are damaged or cannot be cleaned effectively.
6.2. Heat Exchanger Cleaning
Periodically inspect the ceramic heat exchanger for dust buildup. If necessary, gently clean it according to the unit's specific instructions (refer to the full product manual for detailed steps).
6.3. Exterior Grille Cleaning
Ensure the exterior grille remains free of debris, leaves, or other obstructions to maintain proper airflow.
7. Troubleshooting
This section addresses common issues you might encounter with your Unirec-50-S unit.
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not turn on. | No power supply. | Check power connection and circuit breaker. |
| Reduced airflow. | Clogged filters or blocked ducts. | Clean or replace filters. Check ducts for obstructions. |
| Unusual noise during operation. | Loose components or fan obstruction. | Disconnect power and inspect for loose parts or obstructions. If issue persists, contact support. |
| Ineffective heat recovery. | Dirty heat exchanger or incorrect mode. | Clean heat exchanger. Ensure unit is in Recovery Mode. |
If you encounter problems not listed here or if solutions do not resolve the issue, please contact Sodeca customer support.
8. Specifications
| Feature | Detail |
|---|---|
| Model | Unirec-50-S |
| Reference Number | 1118645 |
| Brand | Sodeca |
| Dimensions (L x W x H) | 47 x 31 x 26 cm |
| Weight | 4.5 kg |
| Voltage | 100V - 230V |
| Frequency | 50/60 Hz |
| Power Consumption | 230 Watts |
| Heat Output | 1450 Watts (Note: This value is from source data and may refer to a different metric than typical heat output for a recovery unit.) |
| Thermal Efficiency | Up to 90% |
| Duct Diameter | 150 mm |
| Duct Length (Telescopic) | 120 mm to 470 mm |
| Max Airflow | 54 m³/h |
| Filters | G3 |
9. Warranty and Support
For warranty information, please refer to the documentation provided with your purchase or contact your retailer. Sodeca is a specialist in the design and manufacture of fans and accessories for industrial applications, ensuring high-quality products.
For technical support, spare parts, or service inquiries, please contact Sodeca customer service or your authorized dealer. When contacting support, please have your model number (Unirec-50-S) and reference number (1118645) available.
You can find more information about Sodeca products and support on their official website: www.sodeca.com





