Installs, troubleshoots, repairs or calibrates, and maintains reciprocating and centrifugal chillers, cooling towers, direct expansion systems, electric blast coils, immersion coils pumps, fans, starters, pneumatic and electric controls, electrostatic filters, domestic refrigerator, walk-in coolers and freezers, fountain equipment and ice makers. Installs, maintains, adjusts, modify and perform major overhaul and repair of refrigeration and air conditioning systems by interpreting blueprints, manufacturer specifications, written and verbal instructions.