Brava One 18-25 BF - Boiler SIME - Free user manual and instructions
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| Product Type | Wall-hung condensing gas boiler |
| Model | Brava One 18-25 BF |
| Brand | SIME |
| Heating Output Range | 18 - 25 kW |
| DHW Output | Up to 25 kW |
| Energy Source | Natural gas (G20) / LPG (G30/G31) |
| Power Supply | 230V ~ 50Hz |
| Dimensions (H x W x D) | 700 x 400 x 300 mm |
| Weight | 30 kg |
| Flue Type | Balanced flue (BF) - concentric |
| Efficiency Class | Condensing, high efficiency |
| Main Functions | Central heating, domestic hot water, modulation, weather compensation (optional) |
| Control Interface | Digital display with push buttons |
| Safety Features | Flame failure, overheat protection, frost protection, pump anti-block |
| Maintenance | Annual service required; clean heat exchanger, check flue |
| Spare Parts Availability | Common spare parts available through SIME distributors |
| Noise Level | < 50 dB(A) |
| Water Pressure | 1 - 2 bar recommended |
| Warranty | Standard 2 years (subject to registration) |
Frequently Asked Questions - Brava One 18-25 BF SIME
How do I reset my SIME Brava One 18-25 BF boiler after a lockout?
Press the reset button (usually marked with a flame or R symbol) and hold for 3 seconds. If the boiler locks out repeatedly, consult the manual for error codes or call a qualified engineer.
What does error code 01 mean on my Brava One?
Error code 01 typically indicates a flame failure. Check gas supply, ensure the gas valve is open, and that the flue is not blocked. If the problem persists, contact a service technician.
How do I adjust the water pressure in my boiler?
Locate the filling loop (usually a braided hose with two valves). Open both valves slowly until the pressure gauge reads between 1 and 1.5 bar. Close both valves securely after adjusting.
Why is my boiler not producing hot water?
Ensure the boiler is set to heating and hot water mode (not just heating). Check that the DHW flow rate is sufficient (minimum ~2 L/min). Also verify that the thermostat is calling for hot water.
How often should I service my SIME Brava One boiler?
It is recommended to have your boiler serviced annually by a Gas Safe registered engineer to ensure safe and efficient operation.
Can I use LPG with my Brava One 18-25 BF?
Yes, the boiler can be converted to LPG (G30/G31) using a conversion kit. This should be done by a qualified technician. Check the manual for specific instructions.
What is the minimum flow rate required for the boiler to operate?
The minimum flow rate for central heating operation is typically around 500 L/h. For domestic hot water, a minimum flow rate of 2 L/min is required to activate the DHW mode.
How do I refill the boiler system?
Use the filling loop (external or integrated) to add water until pressure reaches 1-1.5 bar. After filling, vent the radiators to remove trapped air.
Where can I find spare parts for my SIME boiler?
Spare parts can be obtained from authorized SIME distributors or heating parts suppliers. Common parts like pumps, gas valves, and heat exchangers are widely available.
Why does my boiler make a banging noise?
Banging noises are often due to air in the system or limescale buildup. Bleed the radiators to remove air. If the noise persists, descaling by a professional may be required.
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USER MANUAL Brava One 18-25 BF SIME
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Product information
Brand : SIME
Model : Brava One 18-25 BF
Category : Boiler