Multifunctional gas control with single operating knob (OFF, pilot, ON), thermoelectric flame supervision device, restart interlock, servo pressure regulator, automatic shut-off valve, electric modulating device controlling the main gas flow and step opening device (optional). The plunger of the automatic shut-off valve is protected by an oil bath allowing particularly silent operation of the valve. Pilot outlet flow, minimum and maximum main outlet pressure adjustments are available.
824: 2 levels modulation
825: full modulation