Oil burners

Monoblock burners C.260 to C.1100 1 300 to 11400 kW.

With burners C.260 to C.1 100, CUENOD offers a range of mid-sized and large burners. They can be installed in all types of boilers in either the service sector, private residences or in industry.

These burners use domestic heating oil, feature progressive two stage operation and a PID control can provide modulating performance. The turndown ratio is 1/4. The fuel-air mix is controlled electronically (GEM® system).

To build these burners, CUENOD has implemented all its development resources and technological expertise acquired in large shared and industrial installations.

Burners are designed, developed and built in compliance with the European standard EN 267. They received EC certification in compliance with European Directive requirements.

•  Machinery Directive 89/392/EEC
•  EMC Directive 89/336/EEC
•  Low Voltage Directive 73/23/EEC
•  Efficiency Directive 92/42/EEC when burners are installed directly on EC boilers.

CUENOD burners are manufactured in compliance with the quality assurance certificate AFAQ ISO 9002.

"Free flame": clean oil combustion.

Low NOx oil combustion is based on rapid gasification of the fuel by recirculating the combustion gases internally and allows the fuel-air to mix rapidly.

Once the fuel has been vaporized, it will burn and stabilise 30 centimetres from the combustion head. The flame appears to “float freely”, hence the name: “Free flame”.

The heat absorbed by the gasifying oil will cause a significant drop in the flame’s temperature and a decrease in the formation of thermal nitrogen oxide.

The entire range of C.260 to C.1100 burners operate on domestic oil using the “Free-flame” technology. An additional system can be used to control excess combustion air (O2 regulation).

Systems that make all the difference.

Aside from combustion, a burner’s most important function is to control the mix of air and fuel. A correct air-fuel mix ensures higher efficiency and lower emission of pollutants.

Mechanical: of all processes known, the first and the oldest is the mechanical process: each of the components in the mix is controlled by a valve or shutter linked to a cam, the profile of which can adjusted. This is easy to use.

Noise levels of monoblock burners C.260 to C.1100..
Acoustic tests on the fans of C.260 to C.1100 CUENOD burners measured that noise levels for these burners are very low for this power range.

The configuration of certain systems, the proximity to sensitive areas and, in industrial installations, the continuous presence of personnel require special solutions to reduce noise. CUENOD offers a solution tailored to each individual situation or budget.

The first solution involves the use of a sound-proofing box. This box absorbs the noise produced by the burner, such as the sounds of air being sucked in or blown out as well as the noise made by the fan motor. We offer two types of boxes depending on the level of noise reduction required:

• CI.20 for a decrease of between 15 and 20 dB(A), and,
• CI.30 for a decrease of between 20 and 30 dB(A).

These cube-shaped devices completely enclose the burner, leaving openings for the supply of fuel, electricity and combustion air. They are mounted on wheels so they can easily be moved when you need to work on the burner.

The second solution recently made available involves the use of the Variatron®. This device is a frequency regulator that adjusts the fan’s speed to the burner load. At low speeds, the fan speed and the air shutter position are such that noise reduction can reach 15 to 20 dB(A).

Adjusting the speed of the motor will adapt the air flow and the air pressure to the required amount: the Variatron® limits amount of electrical energy consumed for optimum efficiency.

The Variatron® is environment-friendly since it adjusts the fan motor’s output to the requirements of the burner/boiler.

Ignition is inaudible and the burner operates smoothly. Variatrons® are sold as optional features and adapt quite well, with no modification required, to C.260 to C.1100 burners.