Vaillant Ecofit Pure 825 Boiler Instruction Manual
Vaillant Ecofit Pure 825 Boiler
Vaillant Ecofit Pure 825 Boiler Instructions
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Vaillant Ecofit Pure 825 Boiler Specifications
| Specification Category | Parameter | Value (VUW 256/6-3 (H-GB)) |
|---|---|---|
| General Data | Gas Category | I2H |
| Diameter of Gas Pipe | 1/2 inch | |
| Diameter of Heating Connections | 3/4 inch | |
| Expansion Relief Valve Connection Pipe (min.) | 15 mm | |
| Condensate Discharge Pipe (min.) | 21.5 mm | |
| G20 Gas Supply Pressure | 2.0 kPa (20.0 mbar) | |
| CE Number (PIN) | CE-0063CP3646 | |
| SAP 2009/2012 Annual Efficiency | 89.6 % | |
| NOx Class | 6 | |
| Released System Types | C13, C33, C43, C53 | |
| Dimensions & Weight | Product Dimensions, Width | 390 mm |
| Product Dimensions, Depth | 295 mm | |
| Product Dimensions, Height | 702 mm | |
| Net Weight | 32 kg | |
| G20 Power/Loading | Maximum Heat Output | 18 kW |
| Effective Output Range (P) at 40/30 °C | 5.4 to 19.5 kW | |
| Effective Output Range (P) at 50/30 °C | 5.3 to 19.1 kW | |
| Effective Output Range (P) at 80/60 °C | 5.1 to 18.3 kW | |
| Domestic Hot Water Heat Output (P) | 5.0 to 25.2 kW | |
| Heating System | Max. Flow Temperature Adjustment Range (default: 75 °C) | 10 to 80 °C |
| Maximum Permissible Pressure | 0.25 MPa (2.50 bar) | |
| Nominal Efficiency at 80/60 °C | 98.8 % | |
| Nominal Efficiency at 50/30 °C | 104.0 % | |
| Domestic Hot Water | Specific Flow Rate (D) (ΔT = 30 K) EN 13203 | 12.1 l/min |
| Specific Flow Rate (ΔT = 35 K) | 10.4 l/min | |
| Minimum Permissible Pressure | 0.03 MPa (0.30 bar) | |
| Maximum Permissible Pressure | 1 MPa (10 bar) | |
| Recommended Pressure | 0.2 MPa (2.0 bar) | |
| Temperature Range | 35 to 60 °C | |
| Electrical | Electrical Connection | 230 V / 50 Hz |
| Built-in Fuse (slow-blow) | T2/2A, 250V | |
| Max. Electrical Power Consumption | 87 W | |
| Standby Electrical Power Consumption | 2 W |
Vaillant Ecofit Pure 825 Boiler Details
The Vaillant Ecofit Pure 825 boiler is engineered as a highly efficient heat generator, suitable for closed heating installations and domestic hot water production specifically within Great Britain and Ireland. Its compact design, with dimensions of 702mm high, 390mm wide, and 295mm deep, allows for flexible installation in various rooms, including those with baths or showers, provided it adheres to relevant zones and regulations.
This combi boiler boasts a suite of integrated safety features designed to ensure reliable operation and user protection. These include automatic shutdown mechanisms for electrical supply failures, sophisticated overheating safety that triggers before lockout, and a built-in frost protection system. The frost protection actively engages the pump when boiler water temperatures drop below 12 °C, and can ignite the burner if temperatures continue to fall to 5 °C, safeguarding the appliance from freezing.
Another critical safety device is the condensate drain blockage detection. If the condensate drain becomes obstructed, perhaps due to ice formation in external pipework, the boiler will cease operation to prevent potential issues. Addressing such blockages, for instance by applying warm cloths to ice, typically allows for a simple reset and resumption of normal function.
The Ecofit Pure 825 incorporates an advanced operating concept, featuring an intuitive display and accessible installer level. This allows competent professionals to monitor live status codes (S.xx), access check programmes (P.xx) for diagnostics and purging, and review fault memory (F.xx). This detailed diagnostic capability streamlines maintenance and troubleshooting procedures, enhancing service efficiency.
For optimal heating system integration, the boiler offers flexible adaptation options. It features a speed-regulated high-efficiency pump that intelligently adjusts to the heating installation's hydraulic conditions. Users can configure pump output settings and even adjust the burner anti-cycling time to prevent frequent on/off cycles, contributing to energy efficiency and component longevity.
Furthermore, the domestic hot water temperature is adjustable, though specific recommendations are provided for hard water areas. If water hardness exceeds 3.57 mol/m³, it is advised to set the domestic hot water temperature to a maximum of 50 °C to mitigate scale deposition. Proper water treatment and descaling are important considerations for maintaining system performance and extending the boiler's lifespan.
Vaillant emphasizes the importance of using original seals and adherence to specified inspection and maintenance intervals. The boiler is part of the Benchmark Scheme, which underlines responsibilities for both manufacturers and installers to ensure correct equipment selection, proper installation, commissioning, and annual servicing by competent persons. This commitment supports product longevity and compliance with building regulations.
Frequently Asked Questions (FAQs)
Can't find the answer you need? Here are some frequently asked questions about the Vaillant Ecofit Pure 825 Boiler, and we answer them below.
