Installed new 3-ton Carrier heat pump system. Installed new Honeywell thermostat. Installed new plywood overlay. Rebuilt and insulated condensate drain line. Added SS2 safety float switch. Cleared and treated drain and verified operation. Replaced extended supply plenum and sealed with mastic air lock. Installed new filter dryer, pressure tested with dry nitrogen and pulled a vacuum on the copper line set. Replaced disconnect and whip at outdoor condensing system. Charged system to manufacturers spec. System is working properly at time of departure.