Which component can only be found in type 3 appliances?

Which component can only be found in type 3 appliances?

• A. Filter drier
• B. Purge unit
• C. Evaporator
• D. Compressor

Answer: (B)

Low-pressure (Type 3) appliances have a unique need to purge non-condensables and moisture from the refrigerant during servicing. A purge unit is a specialized accessory that handles this purge process, so it appears only on Type 3 machines. The other components are common across many types: a filter drier removes moisture in many systems, while the evaporator and compressor are fundamental parts of the refrigeration cycle and appear in most appliance types. Because the purge unit is specific to the purge step used with Type 3 equipment, it’s the correct choice.

Low-pressure (Type 3) appliances have a unique need to purge non-condensables and moisture from the refrigerant during servicing. A purge unit is a specialized accessory that handles this purge process, so it appears only on Type 3 machines. The other components are common across many types: a filter drier removes moisture in many systems, while the evaporator and compressor are fundamental parts of the refrigeration cycle and appear in most appliance types. Because the purge unit is specific to the purge step used with Type 3 equipment, it’s the correct choice.