FIELD: heat-power engineering; heating appliances working on natural gaseous fuel. SUBSTANCE: proposed gas burner includes water temperature regulator, protective unit, flame and draft sensors connected with said regulator, gas burner unit and ignition torch. Besides that, protective unit is made in form of cutoff valve secured on water temperature regulator; header and tubes of gas burner unit are secured on main panel and ignition torch with flame sensor is secured on ignition torch panel mounted in lower portion of boiler. Draft sensor is secured in upper portion of boiler shell; sensor of water temperature regulator is introduced inside center portion of boiler. Lower portion of main panel is provided with holes and movable damper also provided with holes over entire length. Inspection port made in ignition torch panel near flame sensor is closed with damper. EFFECT: simplified construction; enhanced operational reliability. 4 cl, 6 dwg
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