Description
The Vitocrossal 300, CU3A gas-condensing, floor standing boiler is a testament to the power of a simple solution. With best-in-class, Viessmann-made components and no primary/secondary piping or low-loss headers required, the CU3A is the perfect choice for residential and light commercial applications – including high temperature heating, cast-iron boiler replacements and multi-zone systems.
Features
- Best value in its class with industry-leading technology and the most standard features. Compact, floor-standing boiler with zero clearance to combustibles.
- Self-calibrating Lambda Pro combustion management system ensures optimal combustion efficiency at all times regardless of gas/air quality.
- Low-emission combustion for environmentally-friendly operation.
- Zone circuit capabilities provide 3 input connections that allow easy integration of third party components.
- Extremely quiet operation; quieter than most refrigerators.
- User-friendly Vitotronic outdoor reset boiler and system control for multi-temperature space and DHW heating.
- High-altitude operation up to 10,000 ft (3,000 m).
Specs
- Overall Height (control open) Inches: 67
- Overall Height (control closed) Inches: 61.5
- Safety Header Connection Inches: 55
- Boiler Supply† Inches: 49.5
- Maximum Input (NG) MBH: 125
- Minimum Input (NG) MBH: 25
- Net AHRI Rating MBH: 101
- AFUE %: 95
- Weight lbs.: 275
- Boiler Water Content USG: 13
- Heat Exchanger Surface ft.: 20.7
- Maximum Operating Pressure psig: 30
- Minimum Gas Supply Pressure Naturel Gas (NG) “w.c.: 4
- Gas Valve Connection NPTM: 3/4
- Boiler heating supply and return (NPTM”): 1 1/4
