Method for controlling cooled or heated water pump of air conditioning installation

摘要

A method for controlling the operation of a cooled or heated water pump of an air conditioning installation is provided in which the flow rate of cooled or heated water is controlled to correspond to variations of energy demand on a load side unit. This can be effected by controlling on the basis of the temperature of the cooled or heated water the state of operation of a heat source, and the number of revolutions of the motor for driving the pump. When the temperature of the cooled or heated water is within a predetermined range of temperature and the operation of the heat source is halted, the motor is operated to rotate a number of revolutions N2 determined by a unit for controlling the rotation of the motor based on conditions obtained at a time of halting the operation of the heat source, until the temperature of the cooled or heated water reaches a predetermined value.