Vaillant EcoTEC Plus 826 Boiler Instruction Manual
Vaillant EcoTEC Plus 826 Boiler
Vaillant EcoTEC Plus 826 Boiler
Vaillant EcoTEC Plus 826 Instructions
Here we offer the Vaillant EcoTEC Plus 826 Boiler manual completely free and in English. We have cataloged this manual in the Boilers section on Manualverse, and it has been rated by 1 users with an average rating of 5. If you have any specific questions about Vaillant EcoTEC Plus 826 Boiler, we suggest checking the Frequently Asked Questions (FAQs) section of this manual.
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Vaillant EcoTEC Plus 826 Boiler Specifications
| Category | Specification |
|---|---|
| General | |
| Designated Country | GB, IE |
| Permitted Gas Boiler Category | II2H3P |
| CE PIN | 0063CU3910 |
| UKCA PIN | 0063CU3910 |
| Gas Connection (Boiler Side) | 15 mm |
| Heating Flow/Return Connections (Boiler Side) | G 3/4 ″ |
| Domestic Hot/Cold Water Connections (Boiler Side) | G 3/4 ″ |
| Expansion Relief Valve Connection | 15 mm |
| Condensate Discharge Hose Connection | 19 mm |
| Air/Flue Pipe Connection | 60/100 mm |
| Heating Expansion Vessel Capacity | 10 l |
| Heating Expansion Vessel Pre-charge Pressure | 70 kPa (700 mbar) |
| Min. Flue Gas Temperature | 35 ℃ |
| Max. Flue Gas Temperature | 85 ℃ |
| Approved Gas Boiler Types | C13, C33, C43, C53 |
| NOx Class | 6 |
| Weight with packaging (incl. accessories) | 39 kg |
| Empty Weight of Product | 34 kg |
| Weight Ready for Operation (Filled) | 40 kg |
| G20 Output/Heat Input (Natural Gas) | |
| Gas Connection Pressure, G20 Natural Gas | 2.0 kPa (20.0 mbar) |
| NOx Emission, weighted, G20 (EN 15502-2-1) | 33.20 mg/kWh |
| 30% Efficiency, G20 | 108.8 % |
| Max. Gas Volume Flow (DHW Generation), G20 | 2.80 m³/h |
| Nominal Heat Output Range at 40/30 °C | 2.9 to 21.7 kW |
| Nominal Heat Output Range at 50/30 °C | 2.8 to 21.2 kW |
| Nominal Heat Output Range at 60/40 °C | 2.6 to 20.3 kW |
| Nominal Heat Output Range at 80/60 °C | 2.5 to 19.8 kW |
| Nominal Heat Input Range for Heating (Hi) | 2.7 to 20.4 kW |
| Nominal Heat Input Range for Heating (Hs) | 3.0 to 22.6 kW |
| Min. Flue Gas Mass Flow Rate | 1.23 g/s (4.43 kg/h) |
| Max. Flue Gas Mass Flow Rate | 13.26 g/s (47.74 kg/h) |
| Max. Heat Output for Domestic Hot Water | 29.4 kW |
| Nominal Heat Input for Domestic Hot Water (Hi) | 26.5 kW |
| Nominal Heat Input for Domestic Hot Water (Hs) | 29.4 kW |
| Heating Adjustment Range | 2.7 to 20.4 kW |
| G31 Output/Heat Input (Liquefied Petroleum Gas) | |
| Gas Connection Pressure, G31 LPG | 3.7 kPa (37.0 mbar) |
| NOx Emission, weighted, G31 (EN 15502-2-1) | 38.75 mg/kWh |
| Max. Gas Mass Flow (DHW Generation), G31 | 2.0 m³/h |
| Nominal Heat Output Range at 40/30 °C | 5.5 to 21.2 kW |
| Nominal Heat Output Range at 50/30 °C | 5.4 to 20.6 kW |
| Nominal Heat Output Range at 60/40 °C | 5.1 to 20.0 kW |
| Nominal Heat Output Range at 80/60 °C | 5.0 to 19.8 kW |
| Nominal Heat Input Range for Heating (Hi) | 5.2 to 20.4 kW |
| Nominal Heat Input Range for Heating (Hs) | 5.7 to 22.2 kW |
| Min. Flue Gas Mass Flow Rate | 2.53 g/s (9.11 kg/h) |
| Max. Flue Gas Mass Flow Rate | 12.66 g/s (45.58 kg/h) |
| Max. Heat Output for Domestic Hot Water | 28.6 kW |
| Nominal Heat Input for Domestic Hot Water (Hi) | 26.2 kW |
| Nominal Heat Input for Domestic Hot Water (Hs) | 28.6 kW |
| Heating Adjustment Range | 5.2 to 20.4 kW |
| Heating | |
| Max. Flow Temperature | 85 ℃ |
| Flow Temperature Adjustment Range (Factory: 75 °C) | 30 to 80 ℃ |
| Permissible Operating Pressure, Heating | 0.25 MPa (2.50 bar) |
| Nominal Circulation Water Volume (ΔT = 20 K, 80/60 °C) | 878 l/h |
| Approx. Condensate Rate (pH 3.5-4.0) in 50/30 °C Heating Mode | 2.0 l/h |
| Remaining Pump Head at Nominal Circulation Water Volume | 0.025 MPa (0.250 bar) |
| Domestic Hot Water (DHW) | |
| Start-up Flow Rate | 2.0 l/min |
| Specific Flow Rate D (ΔT = 30 K) (EN 13203-1) | 12.4 l/min |
| Flow Rate (ΔT = 35 K) | 10.6 l/min |
| Permissible Operating Pressure (PMW) | 0.95 MPa (9.50 bar) |
| Required Connection Pressure | 0.07 MPa (0.70 bar) |
| DHW Temperature Adjustment Range | 35 to 65 ℃ |
| Flow Rate Limiter | 8.7 l/min |
| Classification (Total Comfort Factor, EN 13203-1) | *** |
| Electrics | |
| Rated Voltage | 230 V~ |
| Mains Frequency | 50 Hz |
| Permissible Connected Voltage | 190 to 253 V~ |
| Built-in Fuse (Slow-blow) | 4 A |
| Max. Power Consumption in Heating Mode | 81.7 W |
| Max. Power Consumption in Domestic Hot Water Mode | 112 W |
| Electrical Standby Energy Consumption | < 2 W |
| IP Rating | IPX5D |
Vaillant EcoTEC Plus 826 Boiler Details
The Vaillant EcoTEC Plus 826 is a sophisticated combi boiler (identified by its VUW designation), expertly engineered to provide both sealed heating and domestic hot water (DHW) generation. It features a room-sealed design, meaning it draws combustion air from outside the building. This critical feature helps maintain optimal indoor air quality and enhances overall safety within your home. Its thoughtful, compact design allows for flexible installation, even in rooms with specific regulations like zones 2 or 3 of bathrooms, adhering to stringent UK and Irish wiring and building codes.
This appliance boasts an intuitive user interface, simplifying temperature adjustments for both heating and DHW. The clear display utilizes distinct symbols to indicate operational status, such as burner modulation rate, system pressure, and active heating or DHW modes. For added security, a button lock feature can be activated to prevent unintended changes to settings. The EcoTEC Plus 826 is fully compliant with CE and UKCA markings, ensuring it meets high European and UK regulatory standards for quality and safety.
For enhanced user convenience and energy management, the boiler seamlessly integrates with the Vaillant sensoROOM pure (VRT 50/2) room temperature control. This smart accessory unlocks advanced functionalities, including a programmable heating timer with weekly schedules and a time programme assistant. These features enable users to precisely tailor heating periods to their lifestyle, optimizing energy consumption while ensuring consistent home comfort. The control system also allows for easy activation or deactivation of features like Comfort mode, which provides instant hot water.
At its core, the EcoTEC Plus 826 utilizes Vaillant's innovative Sitherm Pro™ technology for intelligent combustion regulation. This adaptive Siemens optimization system automatically manages the gas-air ratio, eliminating the need for manual O₂ or CO₂ adjustments within the same gas family. This not only simplifies installation but also ensures consistent, efficient, and clean combustion performance. Users can also monitor approximate energy consumption, aiding in tracking system performance and identifying potential areas for optimization.
Safety is paramount with the EcoTEC Plus 826, which incorporates multiple protective features. An advanced overheating safety mechanism, controlled by the boiler's software, initiates a safe shutdown before critical temperatures are reached, easily reset via a dedicated button. The integrated frost protection device automatically activates the pump and, if necessary, the burner, safeguarding the system against freezing in cold conditions. Furthermore, the boiler is designed to detect and respond to a condensate drain blockage, shutting down safely to prevent further issues, with resolution often involving clearing the blockage and performing a simple reset.
Frequently Asked Questions (FAQs)
Can't find the answer you need? Here are some frequently asked questions about the Vaillant EcoTEC Plus 826 Boiler, and we answer them below.
MENU → INFORMATION → Water pressure: section. A minimum of 1 bar (0.1 MPa) is recommended, with 1.5 bar (0.15 MPa) being a good standard value.sensoROOM pure (VRT 50/2) control is connected, press and hold the standby button from the basic display for at least three seconds. If a sensoROOM pure is connected, set the lowest target room temperature on the room temperature control.sensoROOM pure, access MAIN MENU → CONTROL → Comfort mode and select On/Off. If a sensoROOM pure is connected, switch warm start (comfort function) on/off at the room control.
