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Pump down Refrigerant into outdoor unit, removed old line set that was in between floor joists and drop sealing, we then drilled into floor joists with 2-1/4 hole saw bit, then ran new 3/4 and 3/8 lineset tho holes and zoom locked couplers, did pressure test at 300psi let sit for 15 min and then pulled vacume. Pumped system down to 300 microns and let sit for 30 min with no rise. Then opened service valves and tested ac. Then tested all operations all okay at time of completion of install.