Giersch MK3.4-ZM-L-N-SD-PA Dual-Fuel Burner
Giersch MK3.4-ZM-L-N-SD-PA Dual-Fuel Burner
Giersch MK3.4-ZM-L-N-SD-PA is an industrial dual-fuel burner designed for commercial and industrial boiler plants requiring high thermal output. It can operate with natural gas or light heating oil, providing a reliable solution for facilities where continuity of heat supply is essential.
Fuel selection can be changed manually at the burner or through a remote changeover system. If the natural-gas supply is interrupted, the system can be switched to heating-oil operation. This feature helps maintain continuous heat supply in manufacturing facilities, hospitals, hotels, shopping centres, large residential complexes and central boiler plants.
In gas operation, the MK3.4-ZM-L-N-SD-PA supports two-stage sliding or modulating output control. In heating-oil operation, it works with two-stage control. Modulating gas operation adjusts burner output according to current heat demand, helping reduce temperature fluctuations, unnecessary starts and fuel losses.
The SD designation indicates a star-delta motor starter. The PA designation indicates a separate heating-oil pump unit. In this configuration, the oil pump is powered by a separate electric motor and operates only when heating-oil mode is required. A safety pressure switch monitors the oil pressure generated by the pump.
A pressure-stable fan and precision mixing system provide efficient mixing of combustion air and fuel. 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: MK3.4-ZM-L-N-SD-PA
• Product type: Industrial dual-fuel forced-draught burner
• Fuels: Natural gas LL/E and light heating oil EL
• Burner output: 887–2705 kW
• Recommended boiler output: 820–2485 kW
• Gas operation: Two-stage sliding/modulating
• Oil operation: Two-stage
• Fuel changeover: Manual or remote
• Heating-oil pump: Separate pump unit
• Electrical connection: 3/N/PE, 230/400 V, 50 Hz
• Main motor output: 5 kW
• Starting system: Star-delta starter
• Power consumption during start-up: 9000 W
• Power consumption during operation: 5180 W
• Main burner current range: 13–22.5 A
• Separate pump-unit output: 550 W
• Pump-unit nominal current: 1.4 A
• Possible additional current with external pump: Up to 2.7 A
• L-gas consumption: 99.8–288.2 m³/h
• H-gas consumption: 89.2–257.7 m³/h
• Heating-oil consumption: 77.8–237.3 kg/h
• Gas connection pressure: 20–300 mbar
• Gas-train options: KEV 2", KEV DN65, DN80 and DN100
• Maximum sound level: 90 dB(A)
• Approximate weight: 120 kg
• NOx in gas operation: ≤100 mg/Nm³
• NOx in oil operation: <200 mg/Nm³
• Optional version: Burner tube extended by 200 mm
