Installed new Air Conditioning System As part of installation - Removed air handler, heat pump condenser and fiberglass return plenum box. Installed new copper line set. Installed new galvanized auxiliary drain pan, air handler, heater, heat pump condenser, hurricane pad and thermostat. Brazed in system. Nitrogen purged during brazing process. Pressure tested system and checked new joints made. Pressures held. Evacuated system and open isolation valves. Started system and checked performance, performing to manufactures specifications.