Installed new 2.5-ton Carrier straight electric system. Installed a new Ecobee thermostat. Rebuilt and insulated primary drain line and verified drain operation. Installed SS2 and SS3 safety float switches. Built new supply plenum and return plenum and sealed with mastic airlock. Replaced disconnect and whip at the outdoor condensing unit. Installed new disconnect at the indoor unit. Installed new filter dryer, pressure tested the copper line set with nitrogen and pulled a vacuum on the line set. Charged system to factory spec. Replaced return air grille. Electrician ran power to the disconnect and the system is working properly at time of departure