Removed old evaporator coil and A/c for main floor/basement system. Installed new Rheem 4 ton evaporator coil and 3.5 ton A/c. Reconnected supply plenum, line set, and drain line. Installed new composite pad for outdoor unit. Tested system operations in cooling. Set refrigerant charge. Removed old evaporator coil and A/c for upstairs system. Installed new Rheem 3 ton evaporator coil and 3 ton A/c. Reconnected supply plenum, drain line and line set. Installed new composite pad for outdoor unit. Tested system operations in cooling. Set refrigerant charge.