The Riello RLS 650/M MX is an automatic monobloc forced-draught Low NOx gas/light oil dual-fuel burner with progressive two-stage or modulating operation and a firing range of 1430/3000–6550 kW.
Both gas and light oil support progressive two-stage or continuous modulating operation. The mechanical cam coordinates combustion air with the gas or oil modulator. Continuous modulation requires an output regulator and the corresponding temperature or pressure probe, supplied separately.
Product Specification
- High-performance fan and an acoustically lined air intake.
- Mechanical cam with gas and oil modulators.
- Adjustable Low NOx combustion head with gas-pilot ignition and pilot gas train.
- Air-pressure and maximum gas-pressure switches.
- Infrared flame detection and burner safety control.
- Star/delta fan motor starter.
- Dedicated motor-driven light oil gear pump.
- Double safety valves on both supply and return oil lines.
- Minimum/maximum oil-pressure switches and supply/return oil-pressure gauges.
- Oil/gas selector, emergency stop and motor thermal protection.
- Flame inspection window, hinged opening and lifting rings.
Electrical and Operating Data
- Power supply: 400 V, three-phase with neutral, 50 Hz.
- Fan motor speed: 2,800 rpm.
- Electrical protection: IP54.
- Auxiliary supply: 230 V, 50/60 Hz.
- Fan motor power: 18.5 kW.
- Oil-pump motor power: 1.5 kW.
- Total electrical input: 22.5 kW on oil; 20.8 kW on gas.
- Burner control: LFL1.333.
- Modulation ratio at maximum output: 4:1.
- Light oil viscosity: 4–6 mm²/s (cSt) at 20°C.
Standard Equipment
- Flange gasket and four flange screws.
- Thermal screen and four boiler mounting screws.
- Two flexible oil hoses and two pump connection nipples with gaskets.
- Valve-proving pressure switch for the gas train.
- Installation, operation and maintenance manual; spare-parts catalogue.
