Condensing gas boiler MCR4 32/AQUAvie125 with stainless steel DHW heater 7857046125AQV

MCR4 32 condensing gas boiler with AQUAvie125

The MCR4 32 wall-mounted condensing gas boiler, complete with an AQUAvie125 stainless steel domestic hot water (DHW) unit, is a complete heating solution for modern central heating and domestic hot water installations. The set can be mounted as a hanging unit (100L) or placed under the boiler (125L, 150L), providing installation flexibility in various technical rooms.

Advanced combustion technology and gas adaptation

The boiler is equipped with the innovative Gas Adaptive System electronic combustion control system, which automatically adjusts the boiler's operation depending on the gas category (E, Lw, Ls, or propane/butane). A special feature is its adaptation to burning gas with a 20% hydrogen blend, making it prepared for future ecological requirements.

The air-gas module provides a wide power modulation range from 10 to 100%, and the check valve allows operation with pressurized flue gas discharge systems C43p. An Ø60/100 mm air/flue connector is included as standard.

High efficiency, ecology, and installation flexibility

The boiler's condensing technology achieves an efficiency of up to 105.8% at full load, translating into significant fuel savings. At the same time, the device is characterized by very low pollutant emissions: NOx <14 mg/kWh, meeting the highest ecological standards.

The stainless steel toroidal heat exchanger is covered by a 5-year warranty, testifying to the high quality of materials and the durability of the construction.

The boiler offers wide connection possibilities: to an air/flue duct (C10, C13, and C33 certifications), a chimney (B23p and C93 certifications), a distribution system (C53), or a collective flue gas discharge system (C43P). In the case of burning Ls gas, a conversion kit must be used as an optional accessory.

A DHW sensor and a boiler-to-heater connection kit are included in the delivery, facilitating professional installation of the heating system.

Comprehensive hydraulic equipment and intelligent control

The hydraulic module includes a brass body and an A-class modulated pump with an energy efficiency ratio of EEI<0.23. A central heating/DHW diverter valve mounted on the supply and a 3 bar central heating safety valve ensure safe system operation.

An 8 liter expansion vessel is located within the boiler's support frame, optimizing the use of installation space.

The E-Pilot control console is equipped with weather compensation and an intuitive interface (requires additional equipment: AF60 outdoor temperature sensor). The system is adapted for connection with the Smart TC modulating thermostat, which enables Wi-Fi connectivity for remote system control and fault signaling via a smartphone or tablet using a free Android or iOS application.

Heaters are standardly equipped with a 2.7 kW / 230V electric heating element. As an optional accessory, the SCB-17B board is available for direct installation in the boiler, allowing for the management of an additional heating circuit.