🔍 Key Concepts

• Role of filter/driers in a refrigeration system (what two things they are mainly there to remove) • Difference between desiccants (drying agents) and filters/absorbers like charcoal • What substances are commonly installed in sealed, replaceable drier cores on commercial marine refrigeration units

💭 Think About

• Ask yourself: is the primary purpose of a standard refrigerant filter/drier to remove moisture, odors, acids, or something else? • Which of these materials is typically formed into solid beads or cores that can be packed inside a replaceable drier shell? • Are liquid drying agents commonly circulated with refrigerant in sealed systems, or do we normally rely on solid desiccant materials?

✅ Before You Answer

• Be clear on the main job of a filter/drier: what contaminants must be removed to protect the compressor and expansion device? • Recall which substance is most often listed as a desiccant in marine or commercial refrigeration manuals (look for names like "molecular sieve," "activated alumina," "silica gel"). • Verify whether activated charcoal is normally used in refrigerant lines, or more commonly used in air or vapor filters (like odor absorbers).