What to do if fault messages (F.xx) appear on my Vaillant Water Heater?
If fault messages (F.xx) appear, try these steps: First, rectify the fault after referring to the table in the appendix or using the check programmes. If that doesn't work, press the restart button (max. three times). If the problem persists, contact customer service.
How to fix radiators not heating up sufficiently at the default setting on my Vaillant Water Heater?
If radiators do not heat up sufficiently at the default setting, set the pump to the maximum speed.
General| Model | ecoFIT pure 825 |
|---|---|
| Category | Boiler |
| Manufacturer | Vaillant |
| Type | Combi |
| Mounting | Wall-mounted |
| Output | 25 kW |
| Max. DHW output | 25 kW |
| Fuel | Natural Gas |
| Efficiency Rating | A |
| ErP efficiency | 93% |
| DHW ErP rating | A |
| Flow Rate | 10.4 l/min |
| Warranty | 2 years |
| Dimensions (H x W x D) | 700 x 390 x 295 mm |
Conveys important safety information to prevent risks of death, injury, or damage.
Details the requirements for maintaining the guarantee and registering the appliance.
Details safety features including electrical failure, overheating, frost, and condensate.
Details the process for connecting gas and water pipes to the boiler.
Instructions for connecting the condensate discharge pipe, including various termination options.
Details various methods for discharging condensate from the boiler.
Information for qualified electricians on performing the electrical installation.
Detailed instructions for performing the electrical wiring connections.
Procedures for safely establishing the main power supply to the boiler.
Guidance on connecting various external controls to the boiler's electronics.
Instructions on setting the hot water temperature, including legionella prevention.
Guides on performing the initial start-up using the benchmark checklist.
Covers checking and treating heating water quality, including hardness and pH.
Describes the process of filling and purging the heating installation.
Covers checks for air/flue pipe, gas flow rate, and gas connection pressure.
Explains how to set the burner anti-cycling time to prevent frequent on/off cycles.
Guidance on adjusting the speed-regulated high-efficiency pump's output.
Instructions on adjusting the bypass valve and its relation to pump output.
Procedure for setting the domestic hot water temperature, with legionella warnings.
Ensures all sections of the Benchmark commissioning checklist are completed.
Procedure for checking the CO2 content of the flue gas.
Instructions on adjusting the CO2 content using the adjustment screw.
Guidance on identifying and eliminating faults using check programmes and customer service.
Detailed instructions for replacing various defective components.
Lists manufacturer requirements for inspection and maintenance intervals.
Provides an overview of the various diagnostic codes and their meanings.
Provides a comprehensive list of fault codes and their possible causes.
Illustrates the wiring diagram for the combi boiler.
A record for validating installation, commissioning, and warranty.
The comprehensive checklist for commissioning gas boilers and validating warranty.
Record section for details of annual boiler servicing and interim work.
Procedure for checking CO and combustion ratio at maximum boiler rate.
Setting the boiler to minimum rate and checking CO/combustion ratio.
To Next Page