Installed new 2.5-ton Carrier heat pump system. Installed new Ecobee Pro thermostat. Installed new extended supply plenum and sealed with mastic air lock. Installed new return plenum. Replaced secondary drain pan and hung the drain pan. Installed new liquid line filter dryer. Pressure tested line set with nitrogen and pulled a vacuum on the line set. Rebuilt and insulated condensate drain line. Added SS2 and SS3 safety float switches. Replaced outdoor disconnect and ran low voltage in 1/2-inch Seal-Tite. Cleared drain and verified system operation.