Water supplement apparatus and water supplement method of closed type boiler

摘要

An object of the present invention is to provide a water replenishing device and a water replenishing method of an enclosed boiler which can prevent the phenomenon of repeated water replenishment operation in replenishing water and shorten the residual air removal time in the pipe. The water replenishing device of the present invention for realizing this is a water replenishing device for a closed type boiler having an enclosed expansion tank (150), wherein the water pressure of water flowing in the pipe connected to the closed expansion tank (150) A water pressure sensing unit 170 for sensing whether or not a first water pressure required for replenishing water is reached; A water replenishment valve 190 opened and closed to replenish water in the pipe; A circulation pump 120 for circulating water in the pipe; A controller for controlling the circulation pump 120 to operate in a state where the water replenishing valve 190 is opened and water is replenished when the water pressure detected by the water pressure sensing unit 170 is the first water pressure;