Customer approved replacement of AC system. Obtained permit and scheduled install. Removed old system. Reenforced air handler deck. Flushed existing copper line set with nitrogen and R11 flush. Installed new air handler, heater and heat pump. Float switch, condenser and thermostat. Connected low voltage and high voltage to air handler and condenser. Pressure tested copper lines. Evacuated system. Started system and checked operation. Operating to manufacturers specifications.