This course is designed as an overview of the concepts and principles that apply to complex HVACR (heating ventilation and air conditioning refrigeration) equipment found in the HVAC industry. Topics include an overview of commercial / industrial HVAC equipment as well as preventative maintenance, rigging and service strategies for this equipment. Pre-requisites: HVAC211M, HVAC212M, HVAC213M, HVAC214M, HVAC221M, HVAC222M, HVAC223M, HVAC224M, or permission of full time HVAC faculty.