Which system component is responsible for regulating the flow of hot gas during the defrost cycle?

The component responsible for regulating the flow of hot gas during the defrost cycle is the hot gas bypass valve. This valve plays a crucial role in directing the hot refrigerant gas from the discharge line of the compressor to the evaporator coil during the defrost cycle. By doing so, it allows for effective and efficient heating of the coil, helping to melt any ice or frost that may have built up. This action is essential for maintaining the performance of the refrigeration system, as it ensures that the evaporator can continue to operate effectively after the defrost cycle is completed.

In the defrost cycle, the hot gas bypass valve acts based on signals from the defrost control board and the system's operational parameters. It ensures that the right amount of heated refrigerant reaches the evaporator to clear ice without causing damage or inefficiencies in the system.

Other components mentioned, such as the thermostatic expansion valve, defrost control board, and evaporator fan, serve different functions within the overall refrigeration cycle. The thermostatic expansion valve regulates the flow of refrigerant to maintain the proper pressure and temperature in the evaporator but does not control hot gas flow during defrost. The defrost control board manages the timing and process of defrost cycles but does not