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An apparatus and method of attaching an auxiliary heat exchanger to a split refrigeration system. The auxiliary heat exchanger is in heat transfer relationship with a supply of water. Connectors are provided in bypass relationship with a valve arranged in the liquid line. The auxiliary heat exchange

An apparatus and method of attaching an auxiliary heat exchanger to a split refrigeration system. The auxiliary heat exchanger is in heat transfer relationship with a supply of water. Connectors are provided in bypass relationship with a valve arranged in the liquid line. The auxiliary heat exchanger, when desired, is closed placing the auxiliary heater in series flow relationship with the system condenser.

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In a split refrigeration heat pump system air conditioner for operation in a heating or cooling mode comprising an outdoor section including a housing having a compressor and an outdoor heat exchanger, and an indoor section having an indoor heat exchanger, one end of said indoor heat exchanger being

In a split refrigeration heat pump system air conditioner for operation in a heating or cooling mode comprising an outdoor section including a housing having a compressor and an outdoor heat exchanger, and an indoor section having an indoor heat exchanger, one end of said indoor heat exchanger being interchangeably connected by a reversing means to said compressor inlet through a suction line or said compressor outlet through a discharge refrigerant line, the other end of said indoor heat exchanger being connected to one end of said outdoor heat exchanger by a second refrigerant line, the other end of said outdoor heat exchanger being interchangeably connected by said reversing means to the outlet of said compressor through said discharge line or said suction line, means adapting said outdoor section for selectively connecting an auxiliary heat exchanger in permanent series flow relationship with the heat exchanger in said system functioning as the system condenser comprising; a valve means in said discharge line being arranged intermediate said compressor outlet and said other end of said outdoor heat exchanger; a first line means in said outdoor section having one end connected to said discharge line between said compressor outlet and said reversing means, the other end of said line being provided with sealed connector means arranged outside said outdoor section; a second line means in said outdoor section having one end connected to said discharge line between said reversing means and said valve, the other end of said line being provided with sealed connector means arranged outside said outdoor housing; an auxiliary heat exchanger connected in bypass relationship to said flow interrupting means; means for placing water in heat exchange relationship with said auxiliary heat exchanger; connecting means associated with the inlet and outlet of said auxiliary heat exchanger, said connecting means being operable when selectively connected to said first and second line means connectors to establish a series flow between said auxiliary heat exchanger and said heat exchanger functioning as the condenser when said valve means is selectively closed so that all of the hot gaseous refrigerant flowing through said discharge line will always flow in series through said auxiliary heat exchanger, regardless of the system operating mode.