Copyright Goodheart-Willcox Co., Inc. Chapter 32 Residential Split Air-Conditioning Systems 827 10 Tecumseh Products Company Some commercial refrigeration condensing units have nearly all the basic components of an HVACR system in one convenient location. This arrangement promotes ease of service and installation. Liquid receiver Electrical wiring box Pressure motor control Liquid receiver service valve Discharge service valve Suction service valve Suction line service valve Accumulator