Installed Carrier 3 ton heat pump. Installed new drain pan. Installed new supply and return air plenums. Attached all ductwork with new metal collars and sealed with mastic. Rebuilt and cleared drain line. Reinsulated drain line. Installed Ecobee pro thermostat. Installed new disconnect and whip for outdoor unit. Installed new condenser pad. Tested system operation and weighed in 1Lb of refrigerant. Everything is working at completion of install.