Serve as a subject matter expert on difficult installation tasks on commercial VRV/VRF HVAC equipment using copper and steel piping, sheet metal ducting, equipment hanging, crane direction, electrical hookups, gas hook ups, hydronic hook ups, and equipment start-ups. Troubleshoot all types of VRV/VRF HVAC systems using power wiring, unit controls, motor, blower, fan, bearing, gas & electric heat, refrigeration systems, economizer, VAV box, fan powered box.