Removed old equipment and installed new Rheem 3 ton a/c, 3 ton evaporator coil with 80 gas furnace. Installed new return plenum with 16x25x4 filter, new emergency drain pan, new pan safety switch, new coil safety switch, new thermostat and new composite pad for outdoor unit. Reconnected high voltage, low voltage, drain line, gas line, vent pipe and all return ducts. Tested system operations in heating and cooling, set refrigerant charge.