Procedures for proper installation and start-up of central air conditioning systems. Troubleshooting of the electrical and mechanical aspects of systems. The proper use and understanding of the psychometric chart. Heat gain calculations for residential and small commercial buildings. Special requirements and components of heat pumps. Students must be simultaneously enrolled in HVAC222M. Prerequisite: HVAC119M, HVAC120M, HVAC121M, HVAC122M.