This standard uses water as the refrigerant and an aqueous lithium bromide solution as the absorption liquid, and supplies a heating source to a regenerator or high-temperature regenerator (including regenerators, high-temperature regenerators, and low-temperature regenerators) to condense vessel. This specifies absorption chillers (hereinafter referred to as chillers) that consist of an absorption refrigeration cycle with an absorber, evaporator, etc. and cool or heat water, and have a single refrigeration capacity of 25 kW or more.