REFR 143: HVACR Year 4 Week 3

Apprentices will apply hydronic theory concepts gained in Year 3 to a variety of chilled water systems. They will learn how to calculate flow rates and troubleshoot issues related to chilled water systems. Apprentices in the HVAC path will review pneumatic controls, including types of air compressors, the gasses or pressurized air used in them, and the components that regulate these units. They will test these systems for leaks or faults and learn how to repair or replace them. Apprentices in the refrigeration pathway will continued advanced refrigeration concepts by drawing electrical schematics for walk-in coolers and freezers, and learn how to locate manufacturer specifications necessary to repairs. They will compare differences in low temperature cases and gas/electric defrost cases. Additionally, they will identify the parts and issues that can arise with a variety of compressors, condensers, and defrost systems, and learn how to control, repair, replace and maintain them.