Vaillant EcoTEC Plus 940 Boiler Instruction Manual
Vaillant EcoTEC Plus 940 Boiler
Vaillant EcoTEC Plus 940 Boiler
Vaillant EcoTEC Plus 940 Instructions
Here we offer the Vaillant EcoTEC Plus 940 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 940 Boiler, we suggest checking the Frequently Asked Questions (FAQs) section of this manual.
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Vaillant EcoTEC Plus 940 Boiler Specifications
| Category | Specification |
|---|---|
| Designated Country | GB, IE |
| Gas Boiler Category | I2H |
| CE PIN / UKCA PIN | 0063CU3910 |
| Gas Connection (Boiler Side) | 15 mm |
| Heating Connections (Flow/Return) | G 3/4 ″ |
| DHW Connections (Hot/Cold Water) | 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) |
| DHW Expansion Vessel Capacity | 1.0 l |
| DHW Expansion Vessel Pre-charge Pressure | 400 kPa (4,000 mbar) |
| Min. Flue Gas Temperature | 35 ℃ |
| Max. Flue Gas Temperature | 85 ℃ |
| Approved Gas Boiler Types | C13, C33, C43, C53 |
| NOx Class | 6 |
| Weight (without packaging, without water) | 60 kg |
| Weight (with packaging, incl. accessories) | 66 kg |
| Weight (ready for operation) | 84 kg |
| Gas Connection Pressure (G20 Natural Gas) | 2.0 kPa (20.0 mbar) |
| NOx Emission (weighted, G20) | 26.30 mg/kW⋅h |
| 30% Efficiency (G20) | 109.2 % |
| Gas Flow Rate (max. gas volume, G20) | 4.32 m³/h |
| Nominal Heat Output Range (40/30 °C) | 5.2 to 32.9 kW |
| Nominal Heat Output Range (80/60 °C) | 4.5 to 29.8 kW |
| Max. Heat Input for Heating | 30.6 kW |
| Heating Min. Heat Input | 4.8 kW |
| Domestic Hot Water Nominal Heat Input | 40.8 kW |
| Max. Flow Temperature | 85 ℃ |
| Flow Temperature Adjustment Range | 30 to 80 ℃ (factory setting: 75 °C) |
| Permissible Operating Pressure (Heating) | 0.25 MPa (2.50 bar) |
| Approx. Condensate Rate (50/30 °C heating) | 3.1 l/h |
| Start-up Flow Rate (DHW) | 1.8 l/min |
| Specific Flow Rate D (ΔT = 30 K) | 21.0 l/min |
| Permissible Operating Pressure (DHW) | 0.95 MPa (9.50 bar) |
| Required Connection Pressure (DHW) | 0.07 MPa (0.70 bar) |
| DHW Temperature Adjustment Range | 35 to 65 ℃ |
| Flow Rate Limiter (DHW) | 14 l/min |
| DHW Cylinder Capacity | 15.0 l |
| Nominal Voltage/Mains Frequency | 230 V/50 Hz |
| Permissible Connected Voltage | 190 to 253 V |
| Built-in Fuse (slow-blow) | 4 A |
| Max. Electrical Power Consumption (Heating) | 98.5 W |
| Max. Power Consumption (DHW) | 149 W |
| Electrical Standby Energy Consumption | < 2 W |
| IP Rating | IP X5 D |
Vaillant EcoTEC Plus 940 Boiler Details
The Vaillant EcoTEC Plus 940 Boiler incorporates Sitherm Pro™ technology, an intelligent combustion regulation system based on Siemens’ adaptive optimisation. This ensures highly efficient and precise operation, contributing to both performance and energy savings. Complementing this, the boiler, its system control, and a dedicated app provide approximate values for energy consumption, yields, and efficiencies, viewable for periods like “Today,” “Yesterday,” “Last month,” “Last year,” and “Total.”
This boiler is specifically intended as a heat generator for sealed heating installations and domestic hot water generation. Its design targets mobile homes that are manufactured, transported once, and then permanently situated in Great Britain and Ireland. It is critical to note that the product is validated only for specific gas types listed on its data plate and explicitly prohibits use in vehicles like caravans, with directly connected wall-hung DHW cylinders, or in multiple-flue configurations or cascades.
Safety is paramount with several integrated features. The boiler offers protection against electrical supply failure, ensuring a controlled shutdown and restart upon power restoration. An overheating safety mechanism actively prevents lockout by shutting down the system, requiring a simple reset to resume. For colder conditions, built-in frost protection activates the pump below 12 °C and the burner if temperatures drop further, preventing freezing. Furthermore, the boiler intelligently ceases operation if a condensate drain blockage occurs, which can be resolved by addressing the obstruction and resetting the unit.
The EcoTEC Plus 940 features diverse hydraulic operating modes to optimally manage heat transfer. These modes, adjustable via diagnostics codes like D.170, include options such as "Bypass, Δp-const." for constant pressure control, "Spread ΔT" for temperature spread regulation, and "Fixed pump stage" for a consistent pump curve. These settings allow the internal heating pump to adapt precisely to the heating system's volume flow and pressure requirements, ensuring efficient distribution of heat throughout the property.
Control system flexibility is a key aspect of the EcoTEC Plus 940. It is fully compatible with Vaillant’s eBUS room controls, such as the sensoROOM pure (VRT 50/2), which offer advanced scheduling and operational settings. For more traditional setups, it also supports standard 230V or 24V room thermostats. Additionally, integration with a Vaillant gateway like myVAILLANT Connect (VR 940f) enables smart room control, allowing users to manage their heating system remotely via a dedicated app, often with weather-compensated control for enhanced efficiency.
To enhance energy efficiency and prolong component life, the boiler features an adjustable burner anti-cycling time. This electronic restart lockout prevents the burner from frequently switching on and off, which could otherwise lead to energy losses. This feature is active exclusively for heating mode, with hot water demands not affecting its timing. Furthermore, the boiler facilitates diligent maintenance scheduling by allowing service intervals to be defined either by operating hours (up to 7000h) or by a specific date, ensuring timely servicing for optimal performance and warranty validity.
Maintaining optimal heating water quality is crucial for the longevity and efficiency of the EcoTEC Plus 940. The manual provides strict guidelines for water hardness based on system volume, highlighting the necessity of water treatment in certain cases. The use of unsuitable additives is expressly prohibited, as they can cause component damage or operational issues. The manual lists approved additives for both cleaning (e.g., Adey MC3+, Fernox F3) and permanent use (e.g., Adey MC1+, Fernox F1), emphasizing adherence to manufacturer instructions for their application.
Frequently Asked Questions (FAQs)
Can't find the answer you need? Here are some frequently asked questions about the Vaillant EcoTEC Plus 940 Boiler, and we answer them below.
