CONTROL SYSTEM FOR GAS FIRED HEATING APPARATUS USING RADIANT HEAT SENSE

摘要

A control system for a gas fired, direct ignition,induced draft furnace includes a radiant heat sensing switchresponsive to a hot surface igniter and burner flame, asingle-pole, double-throw pressure switch responsive to fluidflow effected by the inducer, and a plurality of relaysresponsive to the radiant heat sensing switch, the pressureswitch, and various other connected switching means.