Removed old 2 and 1/2 ton condenser and air handler. Installed new Johnson control 410A air handler and condenser 2 and 1/2 tons. Adapted new air handler to Old dock work kept unistrut so air handler is hung. We rehooked 3/4 line set and 3/8 lines set rehooked up all wiring changed whip change pad. Also put in a Goliath pant hooked up wet switch to glide pan. Also hooked up secondary drain tested drain lines. Everything is offeration with this time perform pressure test on system. Performed micron test on system. Microns went down to 420. Charge system with 410A refrigerator..