1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your Ferroli OMNIA S 3.2 HYBRID 28C 8 kW hybrid heat pump. The OMNIA S 3.2 HYBRID is a reversible air-to-water system designed for heating, cooling, and instantaneous domestic hot water production. It integrates an ecological R32 heat pump with a condensation boiler, offering a compact and versatile solution for both new installations and replacements.
Please read this manual thoroughly before attempting any installation, operation, or maintenance procedures. Keep this manual in a safe place for future reference.
2. Safety Information
Important Safety Instructions:
- Installation, maintenance, and repair must be performed by qualified and authorized personnel only.
- Ensure the power supply is disconnected before performing any service or maintenance.
- The unit contains R32 refrigerant. Handling of refrigerants requires specialized training and certification. Do not attempt to open the refrigerant circuit.
- Do not block air inlets or outlets of the outdoor or indoor units.
- Keep children away from the unit during operation and maintenance.
- Always follow local regulations and standards for electrical and plumbing installations.
3. Package Contents
The Ferroli OMNIA S 3.2 HYBRID 28C 8 kW package typically includes the following components:
- Outdoor Unit
- Indoor Unit
- Integrated Control Command
Please verify that all components are present and undamaged upon delivery. Contact your supplier immediately if any items are missing or damaged.
4. Setup and Installation
The installation of the Ferroli OMNIA S 3.2 HYBRID 28C 8 kW heat pump system requires specialized knowledge and tools. It is mandatory that installation be carried out by a certified and qualified technician to ensure proper functioning, safety, and compliance with warranty conditions.
Key Installation Considerations:
- Location: The outdoor unit should be placed on a stable, level surface with adequate clearance for airflow and maintenance. The indoor unit should be installed in a suitable technical room.
- Refrigerant Circuit: The system uses a divided refrigerant circuit, which requires professional connection and charging. This design helps prevent freezing risks even in extreme outdoor temperatures down to -20 °C.
- Hydraulic Connections: Proper connection to the heating/cooling distribution system and domestic hot water lines is crucial.
- Electrical Connections: Ensure all electrical wiring complies with local codes and the manufacturer's specifications.

Image 1: Example of the Ferroli OMNIA S 3.2 HYBRID 28C 8 kW outdoor unit. This unit is designed for efficient heat exchange with the ambient air.
Refer to the detailed installation manual provided separately for specific instructions and diagrams.
5. Operating Instructions
The Ferroli OMNIA S 3.2 HYBRID system is designed for user-friendly operation via its integrated control command. The system automatically optimizes between the heat pump and the condensation boiler based on climatic conditions to ensure maximum energy efficiency and comfort.

Image 2: The integrated control command for the Ferroli OMNIA S 3.2 HYBRID system. This unit allows users to monitor and adjust system settings.
Basic Operation:
- Power On/Off: Use the designated power button on the control unit to turn the system on or off.
- Mode Selection: Select desired operating mode (Heating, Cooling, or Domestic Hot Water) using the mode selection buttons.
- Temperature Adjustment: Adjust the desired temperature settings for heating or cooling using the '+' and '-' buttons.
- Hybrid Logic: The system intelligently switches between the heat pump and the integrated boiler to maintain efficiency, especially in very cold conditions (down to -20 °C outdoors).
- R32 Refrigerant: The system utilizes R32 refrigerant, which has a lower Global Warming Potential (GWP) compared to older refrigerants, contributing to reduced environmental impact.
For detailed instructions on advanced settings, programming, and specific functions, please consult the dedicated user manual for the control command.
6. Maintenance
Regular maintenance is crucial for ensuring the longevity, efficiency, and safe operation of your Ferroli OMNIA S 3.2 HYBRID heat pump. All maintenance procedures, especially those involving internal components or refrigerant, must be performed by a qualified service technician.
Recommended Maintenance Schedule:
- Monthly (User): Visually inspect the outdoor unit for any obstructions (leaves, debris) and ensure clear airflow.
- Annually (Qualified Technician):
- Check and clean air filters in the indoor unit.
- Inspect the refrigerant circuit for leaks.
- Verify electrical connections and components.
- Clean heat exchangers of both indoor and outdoor units.
- Check system pressures and temperatures.
- Inspect condensate drainage system.
Do not attempt to repair the unit yourself. Unauthorized repairs can void your warranty and pose safety risks.
7. Troubleshooting
If you experience issues with your Ferroli OMNIA S 3.2 HYBRID heat pump, refer to the following general troubleshooting steps. For complex problems or error codes displayed on the control unit, contact a qualified service technician.
Common Issues and Solutions:
- No Power: Check the main power supply and circuit breakers. Ensure the unit is properly plugged in or wired.
- Insufficient Heating/Cooling: Verify that the desired temperature setting is correct. Check if air filters are clean and not obstructed. Ensure outdoor unit is free from obstructions.
- Unusual Noises: Minor operational noises are normal. If you hear loud or unusual sounds, power off the unit and contact a technician.
- Water Leaks: Check condensate drain for blockages. If the leak persists, contact a technician immediately.
Always disconnect power before inspecting any part of the unit.
8. Specifications
| Feature | Specification |
|---|---|
| Manufacturer | FERROLI |
| Model | OMNIA S 3.2 HYBRID 28C 8 kW |
| Product Dimensions (L x W x H) | 118 x 56 x 143 cm |
| Outdoor Unit Dimensions (L x W x H) | 1118 mm x 865 mm x 523 mm |
| Outdoor Unit Weight | 77 kg |
| Color | White |
| Components Included | Outdoor unit, Indoor unit, Control command |
| Refrigerant | R32 (Low GWP) |
| Heating Power (Ta +7 °C, Tw 35 °C) | 8.4 kW (COP 5.15 EN 14511) |
| Cooling Power (Ta 35 °C, Tw 18 °C) | 8.3 kW (EN 14511) |
| Cooling Power (Ta 35 °C, Tw 7 °C) | 7.45 kW (EN 14511) |
| Operating Temperature Range | Down to -20 °C outdoors |
| Technology | Full Inverter, DC Twin Rotary Compressor, Brushless Fans |
9. Warranty Information
Your Ferroli OMNIA S 3.2 HYBRID 28C 8 kW heat pump is covered by a manufacturer's warranty. The specific terms and duration of the warranty may vary by region and purchase agreement. Please retain your proof of purchase and consult the warranty card or documentation provided with your product for detailed information.
The warranty typically covers defects in materials and workmanship under normal use and service. Damage resulting from improper installation, unauthorized repairs, neglect, or misuse is generally not covered. Always ensure installation and maintenance are performed by qualified professionals to maintain warranty validity.
10. Customer Support
Should you require technical assistance, service, or have questions regarding your Ferroli OMNIA S 3.2 HYBRID heat pump, please contact your authorized Ferroli dealer or customer service center.
When contacting support, please have the following information ready:
- Product Model: OMNIA S 3.2 HYBRID 28C 8 kW
- Serial Number (located on the unit's rating plate)
- Date of Purchase
- A clear description of the issue
For the most up-to-date contact information, please visit the official Ferroli website for your region.





