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.