Giersch MK3.1-ZM-L-N-SD Dual-Fuel Burner
Giersch MK3.1-ZM-L-N-SD Dual-Fuel Burner
Giersch MK3.1-ZM-L-N-SD is an industrial dual-fuel burner designed for high-capacity commercial and industrial boiler plants. It can operate with natural gas or light heating oil, making it suitable for installations where fuel-supply reliability is essential.
Fuel selection can be changed manually at the burner or through a remote changeover system. If the gas supply is interrupted or fuel costs change, the installation can be switched to heating-oil operation. This capability helps maintain continuous heat supply in factories, hospitals, hotels, large residential complexes and central boiler plants.
In gas operation, the burner supports two-stage sliding or modulating output control. In heating-oil operation, it works with two-stage control. Modulating gas operation adjusts the burner output according to current heat demand, helping reduce temperature fluctuations and unnecessary starts.
The MK3.1-ZM-L-N-SD version has an oil pump installed directly on the burner. The SD designation indicates a star-delta motor starter, which helps reduce the initial electrical load during motor start-up.
A pressure-stable fan and precision mixing system ensure efficient mixing of fuel and combustion air. The gas train is supplied as a factory-assembled and leak-tested unit. A gas filter is included as standard equipment.
Main features:
• Brand: Giersch
• Model: MK3.1-ZM-L-N-SD
• Product type: Industrial dual-fuel forced-draught burner
• Fuels: Natural gas LL/E and light heating oil EL
• Burner output: 441–1510 kW
• Recommended boiler output: 410–1390 kW
• Gas operation: Two-stage sliding/modulating
• Oil operation: Two-stage
• Fuel changeover: Manual or remote
• Oil pump: Installed directly on the burner
• Electrical connection: 3/N/PE, 230/400 V, 50 Hz
• Electric motor output: 3 kW
• Starting system: Star-delta starter
• Power consumption during start-up: 4800 W
• Power consumption during operation: 3120 W
• Current range: 7.8–12 A
• L-gas consumption: 61.0–166.3 m³/h
• H-gas consumption: 54.5–148.7 m³/h
• Heating-oil consumption: 38.7–132.5 kg/h
• Gas connection pressure: 20–300 mbar
• Gas-train options: KEVII 1½", KEV 2", KEV DN65, DN80 and DN100
• Maximum sound level: 86 dB(A)
• Approximate weight: 107 kg
• NOx in gas operation: ≤100 mg/Nm³
• NOx in oil operation: <200 mg/Nm³
• Optional version: Burner tube extended by 200 mm
