Where must a suction-line drier be placed in a heat pump?

In a heat pump system, the suction-line drier should be placed on the suction line, typically between the evaporator and the compressor. This location allows the drier to effectively remove moisture and contaminants from the refrigerant before it enters the compressor, protecting the compressor and ensuring efficient operation. Proper placement is crucial for maintaining system performance and longevity.