METHOD AND APPARATUS FOR CONTROLLING THREE-WAY VALVE OF GAS BOILER

摘要

PURPOSE: A method is provided to optimize the productivity as well as to minimize the loss of a boiler by displaying the abnormality of a three-way valve. CONSTITUTION: A three-way valve of a gas boiler is controlled by the steps of; feeding AC and DC power to a control system for a three-way valve; detecting a hot water current; recognizing the water current in a control unit consisting of a microcomputer; driving a control circuit unit through the command of the control unit; detecting the response for the command of the control unit; driving a relay if there is no error in action for the response; driving the relay through the command of the control unit; detecting a signal for the relay; and driving a three-way valve to drive a motor for the three-way valve with a signal of the relay.