Which type of reciprocating compressor is not serviceable on-site?

• A. Semi-Hermetic Reciprocating Compressor
• B. Hermetic Reciprocating Compressor
• C. Open Drive Reciprocating Compressor
• D. Rotary Type Compressor

Answer: (B)

The hermetic reciprocating compressor is designed as a sealed unit, meaning that it is not intended for service or repair on-site. This type of compressor has its motor and compressor elements contained within a single housing that is completely sealed from the external environment. Because of this hermetic sealing, if any issues arise, the entire unit typically needs to be replaced rather than repaired on-site, which contrasts with other types of compressors that allow for easier access to internal components for servicing or replacement of parts.

In contrast, semi-hermetic and open-drive reciprocating compressors are designed to allow for some level of serviceability. Semi-hermetic compressors can be opened for repairs while still providing some level of protection against the environment. Open-drive compressors have external motors and are much easier to service as they are not enclosed within a sealed unit. Rotary type compressors also lend themselves to on-site servicing due to their design and accessible components.