What is the role of a filter drier in refrigeration systems?

A filter drier plays a crucial role in refrigeration systems by removing moisture and contaminants from the refrigerant. This is important because moisture in the system can lead to the formation of ice, which can block refrigerant flow, decreasing the efficiency of the system. Additionally, contaminants such as dirt or metallic particles can cause wear and tear on components like compressors and expansion valves, leading to potential failures and reduced performance.

By filtering out these impurities and absorbing moisture, the filter drier helps to maintain the integrity of the refrigerant, ensuring smooth operation and longevity of the refrigeration system. This function is vital, especially during the initial setup or when repairs are made, as the introduction of new components can also introduce moisture and debris into the refrigerant circuit.