Removed old equipment and installed new Rheem 4 ton communicating full gas system. Installed new zone board, new zone dampers, new bypass damper, new supply plenum, 2 new return plenum with 2- 16x25x4 filters, new emergency drain pan, new pan safety switch, new coil safety switch, 2 new Econet thermostats, new surge protector, and new composite pad for outdoor unit. Reconnected high voltage, low voltage, drain line, gas line, all ductwork, and vent pipe. Tested zone system, tested system operations in heating and cooling, set refrigerant charge. Will need to return to cut in 8” return duct.