When could a reciprocating compressor be damaged if energized?

A reciprocating compressor can sustain damage if it is energized while the discharge service valve is closed. When the discharge valve is not open, the compressor continues to compress the refrigerant gas but has no outlet for it to escape. This results in an increase in pressure within the compressor, which can lead to mechanical failure or severe overheating. The compressor is not designed to operate under such conditions, and continued operation can cause critical components to fail.

Maintaining proper operation requires that both the suction and discharge service valves are open during regular running conditions. If the suction service valve is closed, while it can also lead to issues, the immediate danger of damage stems more from a closed discharge valve, where excessive pressure buildup occurs. Thus, understanding the safe operation protocols for compressors is vital in preventing damage and ensuring longevity.