METHOD AND APPARATUS FOR CONTROLLING GROUNDING EXAMINATION OF GAS BOILER

摘要

PURPOSE: A method of controlling grounding examination of a gas boiler is provided to prevent misoperation of a gas boiler and to inhibit excessive currents caused by the falling of a thunderbolt through control grounding examination of wires in the gas boiler. CONSTITUTION: A wire is examined in grounding by power supply, then an examination level is set and a leakage current causing misoperation of a system is isolated. In this moment, the examination level decides presence of grounding from predetermined signals. Noise is eliminated from the outputted signals and a H signal as a grounding examination signal is outputted to stop the system.