Commercial HVAC VRF Commissioning Specialist -- AAON & LG Systems
12 days ago
Orange
Job DescriptionCommercial HVAC VRF Commissioning Specialist — AAON & LG Systems Picture your day: You review the morning dispatch, load your gauges and meters, and head to a downtown rooftop where an AAON packaged unit is ready for start-up. You verify airflow, confirm refrigerant charge, check safeties, and document electrical characteristics. By midday, you’re indoors commissioning an LG VRF heat-recovery system, walking a facility manager through operating sequences and confirming BMS integration with a controls technician. In the afternoon, you’re troubleshooting a hydronic loop, tracking down a VFD fault to a failing fan motor—and you close the loop with a clear service report, photos, part numbers, and recommendations. That’s a typical day for our AAON & LG HVAC Service Technician at DMG. What You’ll Own • Installation, support, start-up, commissioning, maintenance, and repair of commercial HVAC equipment with a primary focus on AAON and LG platforms., • Service & troubleshooting across electrical, mechanical, refrigeration, and controls domains—finding root causes, not just symptoms., • Hands-on work on AAON packaged rooftop units, AAON air-handling equipment, LG VRF systems, LG heat-pump and heat-recovery systems, DX and refrigeration systems, hydronic heating and cooling, and VFDs, motors, compressors, and fans., • System testing and operational verification after repairs or adjustments.Start-Up & Commissioning Excellence, • Execute factory start-ups for AAON and LG equipment; complete all manufacturer documentation accurately., • Verify refrigerant charge, airflow, temperatures, pressures, electrical characteristics, safety circuits, and operating sequences., • Coordinate with controls personnel for BMS/Building Automation System integration and functional testing; assist with troubleshooting of BAS-connected equipment.Preventive Maintenance That Prevents, • Perform scheduled PM on coils, filters, belts, bearings, motors, compressors, electrical components, dampers, economizers, and refrigeration circuits., • Identify developing issues early and recommend corrective actions., • Provide customers with clear condition reports and prioritized repair options.Customer Partnership, • Collaborate daily with customers, service management, controls specialists, contractors, and manufacturers., • Explain findings and fixes in plain language; represent DMG with a professional attitude and appearance., • Respond to emergency and after-hours calls as needed.Documentation That Tells the Story, • Deliver accurate field service reports for every visit., • Record conditions, diagnostics, readings, repairs, and recommendations—include photos, equipment details, and part numbers when useful., • Track labor, travel, and materials precisely., • Flag repair/replacement opportunities for the Service & Controls sales team.What You Bring, • 3+ years of commercial HVAC service experience (preferred)., • Deep understanding of commercial HVAC systems and refrigeration fundamentals., • Fluency in reading electrical schematics and wiring diagrams., • Proven mechanical and electrical troubleshooting capability; adept with diagnostic instruments., • Valid driver’s license with an acceptable driving record., • Independent, organized, and able to manage multiple service calls with strong written and verbal communication., • Commitment to working safely in commercial and industrial environments.Bonus Points, • Experience servicing AAON equipment and LG VRF systems., • AAON factory training/certification and LG VRF training/certification., • Hands-on background in equipment start-up and commissioning.Physical Realities, • Lift and carry HVAC tools and components as needed., • Climb ladders and access rooftops safely., • Work in confined spaces and mechanical rooms., • Operate outdoors across varying weather conditions. If you thrive on complex diagnostics, precise commissioning, and clear communication, you’ll feel right at home here.