Removed old equipment and installed new Rheem 2 ton a/c with 2 ton evaporator coil and 92% gas furnace. Installed new return plenum with 16x25x4 filter, new coil safety switch, new thermostat, new composite pad and new line voltage monitor for outdoor unit. Reconnected supply plenum, high voltage, low voltage, drain line, gas line, vent pipe and all return ducts. Tested system operations in heating and cooling, set refrigerant charge.