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Refrigerating machines include machines or other appliances which have been designed for the

specific purpose of keeping food or other items at a low temperature in an internal

compartment, and air conditioning units. Refrigerating machines and refrigerating machine

components are not subject to the provisions of ADR if they contain less than 12 kg of gas in

Class 2, group A or O according to 2.2.2.1.3, or if they contain less than 12 litres ammonia

solution (UN No. 2672).