Removed old equipment and installed new Rheem 1.5 ton a/c with 2 ton evaporator coil and 80 50kbtu gas furnace. Installed new return plenum, new emergency drain pan, new pan safety switch, new coil safety switch and new composite pad for outdoor unit. Reconnected supply plenum, high voltage, low voltage, drain line, gas line, vent pipe and return duct. Tested system operations in heating and cooling, set refrigerant charge.