BCT231 — Residential and Industrial HVAC IV
6 , 4 lecture periods 4 lab periods Continuation of BCT 134 . Includes refrigerants and oil, compressors, metering devices, retail refrigeration systems, commercial hydronic systems, and steam systems. Perform electrical troubleshooting checks on a single phase compressor. Identify various types of metering devices. Demonstrate the proper cleaning procedures for an ice machine. Explain the terms and concepts used when working with hot water heating and chilled water cooling systems. Describe the basic steam heating cycle. Outline: Refrigerants and Oils Refrigerant structure Refrigerant identification Refrigerant composition Refrigerant leaks Lubrication oils Oil and the refrigeration system Oil handling guidelines System conversion Compressors Role of compressors Open, hermetic, and semi hermetic compressors Types of compressors Capacity control of compressors Compressor electric drive motors Other compressor protection devices Reduced voltage motor starting Causes of compressor failure System checkout following compressor failure Compressor change out Metering Devices Basic operation Fixed metering devices Expansion valves Distributors TXV replacement Metering device problems Retail Refrigeration Systems Mechanical refrigeration systems Defrost systems Retail refrigeration equipment and fixtures Common refrigeration system controls Troubleshooting Commercial Hydronic Systems Water concept review Commercial hot water heating system components Chilled water cooling systems Chi
Prerequisites: BCT134