Presentation Overview

A condensing unit combines a compressor, condenser coil, condenser fan, and controls into a single outdoor assembly that forms the high-side of a split refrigeration or air conditioning system.

Its function is to compress low-pressure refrigerant vapor from the evaporator and reject the absorbed heat to outdoor air through the condenser coil.

Performance is rated in terms of cooling capacity and EER or IEER, which describe efficiency at full and part-load conditions respectively.

Proper application of a condensing unit requires matching its capacity and refrigerant type to the indoor evaporator, accounting for ambient temperature effects on condensing pressure and system efficiency.

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