HVAC Certified Pro / Master

Complete Commercial Inverter Heat Pump Retrofit & Zone Calibration

What Went Right

� Line set vacuum pulled to 180 microns and held for 45 min. � Inverter communication bus synced flawlessly on initial boot.

Pain Points & Obstacles

� Existing line set routing had hidden 90-degree elbows behind drywall. � Factory flare connections on the distribution box required immediate re-torquing.

Master Trade Lesson Learned

Never trust factory pre-flares on modular multi-port boxes�cut and pull new SAE 45-degree flares every time.