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Bard part 8000-859 is an OEM Copeland scroll compressor (ZR57K3-TF5-930) used in Bard wall-mount and packaged HVAC equipment to restore proper refrigerant compression and cooling capacity when the original compressor has failed or is electrically out of spec. This compressor is designed for R-22 applications and is commonly configured for 200/230V three-phase power with sweat style line connections, helping ensure correct fit and reliable operation when matched to the exact Bard model and serial number. As with any compressor replacement, confirm the unit voltage, refrigerant type, and piping connection sizes before ordering, and follow best practices during installation such as replacing the filter drier, verifying system cleanliness, and charging to Bard specifications.