Under general supervision of the Facilities Project Supervisor HVAC, the Refrigeration Mechanic works independently or as a team member to perform the full range of skilled journey level air conditioning and refrigeration work including install, troubleshoot, calibrate, service, repair and maintain refrigeration and HVAC systems, equipment, instruments and controls using electrical, electronic, pneumatic or digitally controlled systems; oil, clean, adjust, overhaul, and repair motors, condensers, compressors, oil and vacuum pumps, and similar equipment; perform major overhauls involving disassembly and inspection of all parts, replacement of defective and worn parts, reassembly of equipment instruments and/or controls, and the testing of equipment to ensure proper functioning; locate and diagnose malfunctions using a wide variety of test equipment and instruments; analyze the efficiency of campus refrigeration and air conditioning systems and recommend action for improvement; respond to service requests; diagnose problems in the distribution of air to individual rooms and buildings and make necessary adjustments; use building automation system to diagnose and troubleshoot problems in HVAC and refrigeration systems; maintain inventory and records; order parts and supplies; and train and provide work direction to skilled and semi-skilled workers. The incumbent uses a computerized maintenance system to ensure the preventive maintenance program objectives are met and also provides instruction and direction to unskilled or semi-skilled assistants.