Condensing gas boiler MCR4 19/SRK100MG with DHW heater. 7857044100K

Wall-mounted condensing gas boiler MCR4 19/SRK100MG

The wall-mounted condensing gas boiler MCR4 19/SRK100MG is a complete heating solution combining a high-efficiency boiler with an enamelled domestic hot water (DHW) heater with a capacity of 100 liters. The set is designed as a dual-function system - providing efficient building heating and domestic hot water preparation in one compact module.

The device features a rated power of 19 kW for central heating (50/30°C: min/max 2.5-20.7 kW) and a DHW power of up to 20 kW at flow/return temperatures of 80/60°C. This power range makes the boiler suitable for both smaller apartments and larger single-family houses.

Advanced condensing technology and ecology

The boiler utilizes modern condensing technology, achieving an efficiency of up to 105.8% at full load. This is the result of utilizing the heat contained in the flue gases by condensing water vapor - a process that occurs naturally during gas combustion.

The heart of the device is a toroidal heat exchanger made of stainless steel, which is characterized by high corrosion resistance and long-term durability. The manufacturer has covered this key component with a 5-year warranty (5-20), demonstrating the quality of workmanship and product reliability.

The Gas Adaptive System automatically adjusts combustion parameters to the type of gas used - it supports categories E, Lw, Ls, and propane/butane. Importantly, the boiler is adapted to burn natural gas with a 20% hydrogen blend, making it ready for future EU ecological requirements.

Low pollutant emissions (NOx <14 mg/kWh) confirm the ecological nature of the device - it meets the latest requirements regarding flue gas purity.

Comprehensive hydraulic equipment and control

The hydraulic module is made of a brass body, ensuring durability and corrosion resistance. It contains an A-class modulated pump with an energy efficiency coefficient of EEI<0.23 - this guarantees minimal electricity consumption while maintaining full functionality.

The integrated central heating/DHW diverter valve is mounted on the supply, simplifying installation and eliminating the need for additional external components. The central heating safety valve set at 3 bar protects the installation from excessive pressure.

An expansion vessel with a capacity of 8 liters is mounted within the boiler's support frame - it does not take up additional installation space.

Control is implemented via the E-Pilot console with weather-compensated control and an intuitive user interface. The system can be expanded with the Smart TC modulating thermostat, which enables control via Wi-Fi using smartphones or tablets (Android/iOS app).

Installation flexibility and wide connection possibilities

The boiler offers wide possibilities for connection to various flue gas discharge systems:

• Air/flue duct Ø60/100 mm (homologations C10, C13, C33)
• Chimney connection (homologations B23p and C93)
• Distribution system (C53) or collective flue gas discharge system (C43P)

Power modulation from 10% to 100% ensures precise adjustment of output to the current heating needs of the building. A non-return valve allows operation with pressurized C43p flue gas discharge systems.

As optional equipment, the SCB-17B board is available for direct installation in the boiler - it enables management of an additional heating circuit without the need to install an external controller.

The set includes: DHW sensor, boiler-heater connection kit, and all necessary elements to start the dual-function system.