Removal and replacement procedures 639. Pull the heat exchanger unit out toward you.To replace this component, see "Replacing the heat exchanger unit ("Replacing the heat exchanger unitwith couplers" on page 63)."Replacing the heat exchanger unit with couplersCAUTION: The heat exchanger unit weighs 23.6 kg (52 lb) with the additional weight of thewater. Use extra caution when removing and replacing the top heat exchanger unit because itmight be higher than your shoulders and is heavy and awkward to lift.
