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Vitocrossal 300 type CR3B
Vitocrossal 300 type CR3B

Gas condensing boiler

The Vitocrossal 300, type CR3B, is the top model amongst floorstanding gas condensing boilers, available from 787 to 1400 kW.

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

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Gas condensing boiler

787 to 1400 kW

Standard seasonal efficiency [to DIN]

Up to 98 % (Hs) [gross cv]

Self-cleaning effect

Thanks to smooth stainless steel surface

High operational reliability and a long service life

Thanks to corrosion-resistant Inox-Crossal heat exchanger made from stainless steel

Clean combustion

Due to low combustion chamber loading and straight-through chamber design

Available with ELCO or Weishaupt pressure-jet gas burner

Available ex works

Easy manoeuvring

Thanks to split design

Two return connectors

For hydraulic connection optimised for condensing technology

Colour touchscreen

Easy to operate Vitotronic control unit with colour touchscreen

Integral LAN interface

For internet communication and integral WiFi for service interface

The picture shows the Vitocrossal 300 type CR3B gas condensing boiler.
Vitocrossal 300 type CR3B gas condensing boiler

The Vitocrossal 300 type CR3B
gas condensing boiler

The Vitocrossal 300, type CR3B, is the top model amongst floorstanding gas condensing boilers, available from 787 to 1400 kW.

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

Advanced condensing technology

The design of the Inox-Crossal heat exchanger enables the Vitocrossal 300 to produce a higher output of up to 1400 kW, whilst retaining its modest dimensions and low weight. In addition, the split design of the heat exchanger module and combustion chamber module makes manoeuvring easier.

The highly effective heat transfer and the high condensation rate enable standard seasonal efficiencies [to DIN] of up to 98 % (Hs) [gross cv] to be achieved. These high levels of standard seasonal efficiency are the result of the countercurrent principle related to hot gas and boiler water, along with intensive turbulation of the hot gases as they pass through the heat exchanger.

The second return connector of the Vitocrossal 300 enables a hydraulic connection that is highly beneficial to the utilisation of condensing technology.

Vitocrossal 300 gas condensing boilers are available with factory-fitted ELCO or Weishaupt pressure-jet gas burners.

Convenient and highly capable Vitotronic control unit

The user friendly Vitotronic control unit with a large colour touchscreen enables quick commissioning using the assistant function. The boiler can be connected directly to the internet for remote monitoring via the integral LAN interface. The Vitosoft 300 service tool communicates directly via WiFi. Energy consumption can be clearly visualised on the control unit's energy cockpit.

Product details

Output in kW (modulating)

787 to 1400 kW. Type CR3B 11/2018: output stages: 787.0; 978.0; 1100.0; 1400.0 kW

Standard seasonal efficiency [to DIN]

Up to 98 % (Hs) [gross cv]

Energy efficiency class

-

Fuel

Natural gas E, LL and LPG

Application area

Gas heating in large residential buildings as well as in public and commercial premises, new build and modernisation projects

Operation

Easy to operate Vitotronic control unit with colour touchscreen. Integral LAN interface for internet communication and integral WiFi for service interface.

DHW heating

Additional DHW cylinder(s) required for high level of DHW convenience

Additional features

Available with ELCO or Weishaupt pressure-jet gas burner

Product cross-section