This standard applies to External-drive, Hermetic and Semi-Hermetic Refrigerant Compressors. In the case of
External-drive Refrigerant Compressors, the driving mechanism shall be excluded from the sound and vibration
measurements. However, for Semi-Hermetic Refrigerant Compressors where the driving mechanism is an integral part of the
compressor assembly as defined in Section 3, it shall be included in the measurements.