| 摘要 |
Gas furnace control system, in particular central heating furnace, is composed of a manual inlet valve, outlet electrovalve controlled by a room thermostat or a boiler thermo-regulator and electromagnetic safety valve powered by thermoelement current, all of which are mounted in one, three-chamber casing. It also comprises a pilot burner, chimney fumes retraction sensor and water overheating sensor in the boiler's water jacket. It is characterised in that there is an electromagnetic valve (C) mounted in the side chamber (6), connected with the main passage (8) through a duct (7), which connects the inlet chamber (9) with the main chamber (10). The valve is controlled by the water-overheating sensor in the water jacket (26) and chimney fumes retraction sensor (25). Side chamber (6) shield (11) has a connector (12) fixed to it, which is through a cable (13) connected with the pilot burner (14). Electromagnetic safety valve (A) is fixed to the inlet chamber (9) shield (16) and the manual valve (D) and outlet electrovalve (B) are fixed to the main chamber (2) shield (10).<IMAGE>
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