Where should a liquid line drier be installed in a refrigeration system?

The correct location for a liquid line drier in a refrigeration system is between the condenser and the metering device. This placement is critical because the purpose of the liquid line drier is to remove moisture and debris from the refrigerant before it enters the expansion device. By ensuring the refrigerant is clean and free of moisture, the drier helps prevent damage to the expansion device and the evaporator, which could lead to inefficient operation or even system failure.

Having the drier in this position allows it to effectively capture any contaminants that may have entered the system and helps maintain the overall efficiency and longevity of the refrigeration system. In contrast, placing the drier in other locations, such as between the evaporator and compressor or in the compressor discharge line, would not provide the necessary protection for the components before the refrigerant undergoes its pressure drop and phase change at the metering device.