1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your Beretta Ciao 24 CAI LX GPL wall-mounted boiler, model 20151437. Please read this manual thoroughly before installation and use, and keep it for future reference. This appliance is designed to provide heating and hot water for domestic use.
2. Safety Information
Important Safety Instructions:
- Installation, maintenance, and repair must be carried out by qualified and authorized personnel only, in accordance with local regulations and standards.
- Do not attempt to modify the appliance or its components. Unauthorized modifications can be dangerous and will void the warranty.
- Ensure adequate ventilation in the installation area to prevent the accumulation of unburnt gases.
- If you smell gas, immediately shut off the gas supply, open windows and doors, and contact a qualified technician. Do not operate electrical switches or use open flames.
- Keep flammable materials away from the boiler.
- Regularly check the pressure gauge. If the pressure is too low or too high, consult the troubleshooting section or contact a technician.
- 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.
3. Product Overview
The Beretta Ciao 24 CAI LX GPL is a wall-mounted boiler designed for efficient heating and hot water supply. It operates on Liquid Propane Gas (LPG) and features a nominal heat output of 24 kW. The appliance has a seasonal space heating energy efficiency class of C and a water heating energy efficiency class of B.

Image 1: Front view of the Beretta Ciao 24 CAI LX GPL Wall Boiler. The boiler is white with a control panel at the bottom, featuring a digital display and rotary knobs.

Image 2: Closer front view of the Beretta Ciao 24 CAI LX GPL Wall Boiler, highlighting the control panel with its digital display and two main rotary controls for temperature adjustment and mode selection.

Image 3: Energy efficiency label for the Beretta Ciao 24 C.A.I. Lx boiler. It shows a seasonal space heating energy efficiency class of C and a water heating energy efficiency class of B, with a sound power level of 59 dB and a nominal heat output of 24 kW.
4. Setup and Installation
The Beretta Ciao 24 CAI LX GPL boiler is designed for wall mounting. Installation must be performed by a certified professional in compliance with all applicable local and national regulations for gas appliances and plumbing systems.
Key Installation Considerations:
- Location: Choose a suitable location that allows for proper ventilation, access for maintenance, and proximity to gas, water, and flue connections.
- Mounting: Securely mount the boiler to a load-bearing wall using appropriate fixings.
- Gas Connection: Connect the boiler to the LPG supply. Ensure all connections are leak-free and tested.
- Water Connections: Connect the domestic hot water and heating system pipes. Install isolation valves for ease of maintenance.
- Flue System: Install the flue system according to manufacturer instructions and local regulations to ensure safe exhaust of combustion products.
- Electrical Connection: Connect the boiler to the electrical supply. Ensure proper grounding.
- System Filling: Fill the heating system with water and bleed air from the radiators. Check the system pressure.
Refer to the detailed installation guide provided separately for specific instructions and diagrams.
5. Operating Instructions
This section provides general guidance on operating your Beretta Ciao 24 CAI LX GPL boiler. For detailed instructions on specific functions, refer to the control panel diagram and corresponding sections in the full manual.
5.1. Initial Start-up
- Ensure the gas supply is open and the electrical supply is connected.
- Check that the system water pressure is within the recommended range (typically 1.0 to 1.5 bar).
- Turn the main power switch on. The boiler will perform a self-diagnostic check.
- Select the desired operating mode (e.g., heating only, hot water only, or both) using the mode selector knob on the control panel.
5.2. Adjusting Temperature
- Heating Temperature: Use the heating temperature control knob to set the desired temperature for your central heating system.
- Domestic Hot Water Temperature: Use the hot water temperature control knob to set the desired temperature for your domestic hot water.
5.3. Shutting Down the Boiler
- For temporary shutdown, turn the mode selector knob to the 'off' or 'standby' position.
- For extended periods of absence or maintenance, turn off the main power switch and close the gas supply valve.
6. Maintenance
Regular maintenance is crucial for the safe, efficient, and long-lasting operation of your Beretta boiler. It is recommended that the boiler be serviced annually by a qualified technician.
6.1. User Maintenance (Monthly/Quarterly)
- Visual Inspection: Check for any visible leaks, corrosion, or unusual noises.
- Pressure Check: Monitor the system pressure on the gauge. If it falls below 1.0 bar, repressurize the system according to the instructions in the full manual.
- Ventilation: Ensure that all ventilation openings are clear and unobstructed.
6.2. Professional Annual Service
A qualified technician should perform the following during an annual service:
- Thorough cleaning of the combustion chamber, burner, and heat exchanger.
- Checking and adjusting gas pressure and combustion efficiency.
- Inspection of all safety devices.
- Checking for leaks in gas and water connections.
- Inspection of the flue system for blockages or damage.
- Testing of the expansion vessel.
7. Troubleshooting
This section addresses common issues you might encounter with your boiler. For more complex problems or if the issue persists, contact a qualified service technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| No heating or hot water | No gas supply, low system pressure, power failure, thermostat setting too low, boiler lockout. | Check gas valve, check power supply, repressurize system, check thermostat, reset boiler (refer to manual for reset procedure). |
| Boiler making unusual noises | Air in the system, low water pressure, pump issues, limescale buildup. | Bleed radiators, check system pressure, contact technician for pump or limescale issues. |
| Water leak | Loose connection, faulty component, excessive pressure. | Turn off water supply, contact a qualified plumber immediately. |
| Boiler displays an error code | Specific fault detected by the boiler's internal diagnostics. | Refer to the full manual's error code section for specific meanings and solutions. Attempt a boiler reset if recommended. |
8. Specifications
Detailed technical specifications for the Beretta Ciao 24 CAI LX GPL boiler, model 20151437.
| Feature | Detail |
|---|---|
| Brand | Beretta |
| Item Model Number | 20151437 |
| Product Dimensions (L x W x H) | 33 x 40 x 75 cm |
| Item Weight | 28 Kilograms |
| Energy Source | Liquid Propane Gas (LPG) |
| Color | White (Bianco) |
| Voltage | 1.5 Volt (likely for control panel/ignition) |
| Efficiency Class (Space Heating) | C |
| Efficiency Class (Water Heating) | B |
| Style | Open Chamber LPG |
| Mounting Type | Wall |
| Is Electric | No (refers to primary energy source) |
| Manufacturer | Beretta |
| Capacity Profile | XL |
| Nominal Heat Output | 24 kW |
| Annual Energy Consumption (GCV) | 90 GJ |
| Annual Electricity Consumption | 20 kWh |
| Annual Fuel Consumption (GCV) | 19 GJ |
| Seasonal Space Heating Efficiency | 77 % |
| Water Heating Energy Efficiency | 78 % |
| Sound Power Level (Indoor) | 59 dB |

Image 4: Page 1 of the Kiwa Declaration of Conformity, issued 31-08-2018, confirming that Beretta central heating boilers, including the Ciao 24 C.A.I. Lx, comply with Regulation (EU) 2016/426.

Image 5: Page 2 of the Kiwa Declaration of Conformity, Annex 1, listing various Beretta boiler models, including Ciao 24 C.A.I. Lx, and their approved gas groups and pressures.

Image 6: Page 1 of the Kiwa EC Type Examination Certificate, issued 31-08-2018, for Beretta boilers, including the Ciao 24 C.A.I. Lx, detailing performance data such as efficiency and heat output for different models.

Image 7: Page 2 of the Kiwa EC Type Examination Certificate, Annex 2, providing notes and definitions for the performance values listed in Annex 1, clarifying terms like rated heat output and temperature regimes.

Image 8: Product Card (Productkaart) for the Beretta Ciao 24 CAI LX GPL boiler, summarizing key energy efficiency and performance data as per EU Regulation 811/2013.
9. Warranty and Support
For warranty information, please refer to the documentation provided at the time of purchase. Warranty terms and conditions may vary based on region and retailer.
For technical support, service, or spare parts, please contact your authorized Beretta dealer or a qualified service technician. Ensure you have your boiler's model number (20151437) and serial number available when contacting support.





