Vaillant EcoTEC Plus 618 Boiler Instruction Manual
Vaillant EcoTEC Plus 618 Boiler
Vaillant EcoTEC Plus 618 Boiler
Vaillant EcoTEC Plus 618 Boiler Instructions
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Vaillant EcoTEC Plus 618 Boiler Specifications
| Feature | Specification) |
|---|---|
| CH Heat Output Range (80°C Flow/60°C Return) | 6.7 – 18.0 kW |
| CH Heat Output Range (60°C Flow/40°C Return) | 6.9 – 18.6 kW |
| CH Heat Output Range (50°C Flow/30°C Return) | 7.1 – 19.1 kW |
| CH Heat Output Range (40°C Flow/30°C Return) | 7.2 – 19.5 kW |
| Category | II2H3P |
| SEDBUK Band | A |
| SAP Seasonal Efficiency | 91.2 % |
| Inlet Gas Working Pressure Required (G20, Natural Gas) | 20 mbar |
| Inlet Gas Working Pressure Required (G31, Propane) | 37 mbar |
| Connected Load (G20) | 1.9 m³/h |
| Connected Load (G31) | 1.43 kg/h |
| Exhaust Mass Rate (Min. Thermal Load) | 3.2 g/s |
| Exhaust Mass Rate (Max. Thermal Load) | 8.3 g/s |
| Exhaust Temperature (Min. Thermal Load) | 40 °C |
| Exhaust Temperature (Max. Thermal Load) | 83 °C |
| NOx Class | 5 |
| Protection Class | IP X4D |
| Max. Flow Temperature | 85 °C |
| Adjustable Flow Temperature | 30 – 85 °C |
| Default Max. Flow Temperature Setting | 75 °C |
| Maximum CH System Pressure | 3.0 bar |
| Circulating Water Volume (ΔT=20 K) | 774 l/h |
| Approx. Condensation Volume (50°C Flow/30°C Return Heating) | 1.7 l/h |
| Pump Delivery Height | 250 mbar |
| Exhaust Flue | 60/100 mm |
| Flue Categories | C13, C33, C43, C53, C83, B23, B33 |
| 10L Expansion Vessel Pre-Charge Pressure | 0.75 bar |
| Connections Heating Flow/Return | 22 mm |
| Gas Inlet | 15 mm |
| Pressure Relief Discharge Pipework (Min.) | 15 mm |
| Condensate Drain (Min. Internal Drain) | 19 mm |
| Dimensions (H x W x D) | 720 x 440 x 335 mm |
| Weight (Boiler Only) | 35 kg |
| Primary Water Content | 1.9 l |
| Electrical Supply Voltage | 230/50 V~/Hz |
| Internal Fuse (Slow) Main Voltage | 2 A |
| Power Input | 100 W |
Vaillant EcoTEC Plus 618 Boiler Details
The Vaillant EcoTEC Plus 618 is a sophisticated wall-mounted, room-sealed, fan-assisted condensing system boiler. Engineered for efficiency, it exclusively provides central heating and works in conjunction with a separate indirect hot water cylinder for domestic hot water supply. This model does not feature instantaneous domestic hot water delivery or the "warmstart" function, as those are characteristics of combination boilers.
At its core, the EcoTEC Plus 618 incorporates high-efficiency condensing technology, allowing it to modulate its output fully for central heating, thereby optimizing energy consumption. It features a two-stage circulating pump whose capacity can be adjusted to suit specific heating system requirements, further enhancing efficiency and performance. An integrated adjustable system by-pass (preset at approximately 250 mbar, adjustable from 170 to 350 mbar) makes it ideal for use with thermostatic radiator valves.
The boiler is equipped with an advanced multifunctional digital display system that provides users with crucial operating information. This includes the current heating flow temperature and system pressure, along with various status and fault codes. User interaction is facilitated through intuitive "i", "+", and "-" buttons, enabling access to operational data and basic settings.
For energy saving, the EcoTEC Plus 618 includes an "anti-cycling economiser" control, which prevents short, wasteful on-off cycles in central heating mode. Additionally, an automatic pump spin control (APS) periodically activates the pump to prevent seizure during periods of inactivity, contributing to the boiler's longevity and reliability.
Safety is paramount, and the boiler is fitted with an integral frost protection function. If the heating water temperature within the boiler circuit drops below 5 °C while the main switch is on and power is supplied, the boiler will automatically activate to heat its circuit to approximately 30 °C. It is important to note that this function protects the boiler itself, but additional measures may be needed to safeguard the entire heating system from frost.
Maintenance and environmental responsibility are also key considerations. The boiler features a siphonic condensate discharge system with a 140 mm water trap, designed to collect about 200 ml of condensate before releasing it, which helps minimize the risk of the drain pipe freezing. Both the appliance and its packaging are made from recyclable materials, emphasizing proper disposal.
Regular maintenance is crucial for optimal performance and a prolonged lifespan. Vaillant recommends an annual inspection and comprehensive maintenance by a competent person at intervals of no longer than five years. The boiler comes with a two-year factory guarantee, contingent on an annual service being performed by a qualified installer after the first year to validate the second year of coverage.
Frequently Asked Questions (FAQs)
Can't find the answer you need? Here are some frequently asked questions about the Vaillant EcoTEC Plus 618 Boiler, and we answer them below.
