The compressor sucks in gas, compresses it and sends it, under pressure, to a circuit where it expands and evaporates, producing cold. The cycle then begins again.

The evaporator placed in the refrigerator is a heat exchanger. It removes heat. The gas is evaporated in the evaporator and exchanges with the ambient temperature prevailing in the refrigerator, leaving the amount of heat required for this evaporation.

The condenser is also a thermal exchanger. It removes the heat from the liquefaction of vapour compressed by the compressor and transmitted to the environment. To remove this heat in the best conditions, the tube, which is the condenser coil, must be based on the volume to be cooled. For refrigerating up to 130 litres of volume, it is composed of small fins, for 160 litres medium sized; beyond that it is necessary to have a large interior with a spiral tube to increase surface evaporation. The condenser should be cooled. Up to 160 litres it is by air (fan.) Above this volume and up to 340 litres or 80 litres in a freezer, a water cooled condenser is preferable. All AD selected models are equipped with Danfoss condensers, designed for use on a boat (12 or 24 volts.)The electronic consumption control unit protects the unit and batteries from high voltage fluctuations.


Check the insulation of the cold compartment. Often it is minimal and contributes to power consumption. Defrost the evaporator regularly. An iced evaporator no longer chills. Ensure good ventilation of the compressor. Never put hot food in a refrigerator