interconnection structure 80 that connects the components within compressor package 50 to the components within evaporator package 30 and to the components within condenser package 70 in evaporator package 30 evaporator 36 is connected in circuit 382 with a defrost or cool vapor valve 342 and an expansion valve 344 in compressor package 50 receiver 40 compressor 54 and accumulator 56 are connected in circuit 382 with a filter 351 a bypass valve 353 a head master or head pressure control valve 358 and an output pressure regulator 357 a heat exchanger loop 387 passes through accumulator 56 and is in thermal relationship with an output tube of accumulator 56 to optimize the use of liquid refrigerant in the accumulator during the freeze cycle it will be appreciated by those skilled in the art that evaporator package 30 compressor package 50 and condenser package 70 may include other valves and controls for the operation of ice cube making machine 20 for example ice making machine 20 includes a controller 393 that controls the operations thereof including the activation of bypass solenoid valve 353 during the harvest cycle alternatively a pressure switch 392 during harvest mode can activate solenoid valve 353 according to a feature of the.