Vitocrossal 300 type CR3B

Gas Condensing Boiler

The Vitocrossal 300, type CR3B, is the top model among floor-standing gas condensing boilers with a capacity of 787 to 1400 kW.

Rated heat output: 787 - 1400 kW
Standard seasonal efficiency [DIN] up to 98% (Hs) [gross cv].
High operational reliability and long service life
Self-cleaning effect

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Gas Condensing Boiler

787 - 1400 kW

Standard Seasonal Efficiency [DIN]

Up to 98% (Hs) [gross cv].

Self-cleaning effect

Thanks to the smooth stainless steel surface

High operational reliability and long service life

Thanks to the corrosion-resistant Inox-Crossal stainless steel heat exchanger

Clean combustion

Due to the low load of the combustion chamber and the co-flow design of the chamber

Available with ELCO or Weishaupt gas burner with gas pressure jet

Available Former Jobs

Easy manoeuvring

Thanks to the split design

Two mating connectors

For a hydraulic connection optimized for condensing technology

Color Touch Screen

Easy-to-operate Vitotronic control unit with colour touch screen

Built-in LAN interface

For Internet connection and built-in WiFi for service interface

Vitocrossal 300 Gas Condensing Boiler Type CR3B

The Vitocrossal 300, type CR3B, is the top model among floor-standing gas condensing boilers with a capacity of 787 to 1400 kW.

As a complete boiler system, it is the most powerful condensing boiler in the extensive range offered by Viessmann. This makes it equally suitable for residential complexes, local heating networks, large public and commercial buildings and industrial plants.

Find out more about the Vitocrossal series

Advanced condensing technology

The design of the Inox-Crossal heat exchanger allows the Vitocrossal 300 to produce higher power up to 1400 kW, while maintaining a modest size and low weight. In addition, the separate design of the heat exchanger module and the combustion chamber module makes it easy to maneuver.

Highly efficient heat transfer and high condensation rates achieve standard seasonal efficiencies [DIN] of up to 98% (Hs) [gross cv]. This high standard seasonal efficiency is the result of the principle of counter-flow between hot gas and boiler water, as well as the intense turbulization of hot gases as it passes through the heat exchanger.

The second return connector of the Vitocrossal 300 provides a hydraulic connection, which is very advantageous for the use of condensing technology.

The Vitocrossal 300 gas condensing boilers are supplied with factory-installed ELCO or Weishaupt pressurized gas burners.

User-friendly and high-performance Vitotronic control unit

The user-friendly Vitotronic control unit with a large colour touch screen enables fast commissioning via the assistant function. The boiler can be connected directly to the internet for remote monitoring via the built-in LAN interface. The Vitosoft 300 service tool communicates directly via WiFi. The energy consumption can be clearly seen in the power cabin of the control unit.

Subsidy options

UNDER CONSTRUCTION

Product details

Power in kW (modulated)	787 – 1400 kW. Type CR3B 11/2018: output stages: 787.0; 978,0; 1100,0; 1400.0 kW
Standard Seasonal Efficiency [DIN]	Up to 98% (Hs) [gross cv].
Energy efficiency class	–
Fuel	Natural gas E, LL and LPG
Applications	Gas heating in large residential buildings, as well as in public and commercial premises, in new construction and modernization projects.
Surgery	Easy-to-operate Vitotronic control unit with colour touchscreen. Built-in LAN interface for Internet communication and built-in WiFi for service interface.
Hot water heating	Additional DHW cylinder(s) required for a high level of DHW convenience
Additional features	Available with ELCO or Weishaupt gas burner with gas pressure jet
Product cross-section

ServiceConnect Commercial

The innovative service concept gives Viessmann’s sales partners an additional advantage when working with commercial customers and local authorities thanks to complete service from a distance.