RIELLO RESIDENCE PRO CONDENSING BOILER COMBI 120,000 BTU INPUT 1/60/120

The Residence Pro's Active Combustion Control (ACC) system, designed and developed by Riello, allows for functionality, efficiency and low emissions under any conditions. The ACC system uses a flame (ionization) sensor signal to regulate combustion. The system maintains a continuous and optimal air/gas mixture throughout modulation (allowing the CO2 readings to remain steady). RESIDENCE PRO's sophisticated control system provides the auto-regulation of the combustion so there is no need for an initial calibration. The ACC system is able to adapt the boiler to operate with different gas compositions. The ACC system can also perform an auto diagnostic operation that locks out the burner before the permitted upper emission limit is exceeded. ACC advantages: Auto-adaptability of the system to the type and composition of the gas eliminates the need for gas conversion kits. No mechanical calibration or manual adjustments for combustion are required on the boiler. fuel value is maintained throughout boiler operation. Continuous emission control is in compliance with prevailing standards. Substantial gas savings compared to traditional systems. Efficiency and reliability are assured for the life of the boiler. The ACC system enables the boiler to change based on data received from parameters that take in consideration both deterioration of components and data acquired over time.

Features: •Intuitive control, icon-based interface. •AFUE ratings of 95% - 7:1 turndown ratio - Low NOx emissions (SCAQMD) •Automatic calibration/ Gas Adaptive for optimum efficiency •Automatic air purge - Back flow prevention - Warm weather shutdown •Field convertible from natural gas to propane without a conversion kit •Automatic self-diagnostics, featuring easy to use control panel with back-lit display •Domestic hot water priority - Seize protection - Frost protection •Produces up to 3.3 gpm (12,5 lt/min) of domestic hot water at a 72°F (40°C) rise ¦•Zero clearance to combustibles - NPT threading for gas and plumbing connections •Easily accessible low voltage terminal strip for quick connections to accessories •Venting options include concentric, two pipe direct vent or one pipe power vent options in rigid PP and CPVC (PVC can be used on the intake only). •Certified and tested at high altitude (up to 10,000 ft). No hardware modification required