This course will begin with a review of electrical theory, relay logic, schematic diagram interpretation, and troubleshooting. It will then introduce the student to different automatic control systems used in the HVAC/R industry. As time permits, the course will begin with electro-mechanical controls and then proceed to pneumatics, direct digital controls, programmable logic controls, and variable frequency drives. Prerequisites: REFG 121, REFG 122, REFG 123, REFG 124. (S)