Viessmann Vitocrossal 300, CU3A Flyer

Gas Condensing Technology
VITOCROSSAL 300, CU3A
Gas Condensing Technology
Vitocrossal 300, CU3A 19-199 MBH
POWERFULLY SIMPLE. The Vitocrossal 300, CU3A gas-condensing, floor mounted boiler is a testament to the power of a simple solution. With best-in-class, Viessmann­made 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.
Industry-leading Viessmann made SA240 316 Ti stainless steel Inox-Crossal steel heat exchanger.
Featuring a folding Vitotronic 200 KW6B boiler and system control.
Simply ideal for new construction and retrofits.
With its compact design, the Vitocrossal 300 CU3A is simple, fast and easy to install. To replace an old cast-iron sectional boiler, the CU3A is the ideal “drop-in” replacement with simple connection. All the existing system piping remains intact. For new installations, the CU3A alleviates the need for costly piping arrangements. Flue venting is also simplified with the exhaust and intake air connections located at the bottom of the boiler, only 11.5” off the ground, allowing easy connection to existing chimneys.
Advanced condensing technology
Constructed with titanium stabilized SA 240-316Ti stainless steel, the Inox-Crossal heat exchanger provides the ideal conditions for the utilization of the condensate in the hidden heat of the flue gas. The smooth combustion chamber surface and the vertically arranged heat exchanger drains the accumulating condensate and creates a permanent self-cleaning effect which maintains efficiencies up to 98% (95% AFUE), ensures prolonged service life and reduces maintenance.
Intelligent combustion control
The proven MatriX dome gas burner with Lambda Pro combustion control automatically adjusts to fluctuating gas qualities and ensures a consistently high combustion efficiency for both natural gas and propane gas.
Simple and powerful Vitotronic control
Installing contractors and end users benefit equally from the easy-to-use, flexible Vitotronic 200 KW6B boiler and system control that manages the entire heating system with maximum comfort, precise temperature settings and cost-effective fuel savings. The control menu is logical, intuitive and easy to set up. Features include control up to 3 heating circuits, intelligent DHW control, a variable speed pump output (0-10V), and multiple setback timers. The graphic user interface will display system parameters and solar yield if integrated with a Viessmann solar system.
Wide water passageways
Large water content is contained within the pocket design of the heat exchanger. This allows for simplified system piping with full system flow, eliminating the need for a dedicated boiler pump or primary/secondary piping.
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