What is the required discharge pressure for a defrost hot gas regulation?

The required discharge pressure for a defrost hot gas regulation is typically set at 90 PSIG. This pressure is crucial for effectively managing the refrigeration cycle during the defrost process in industrial refrigeration systems.

At 90 PSIG, the hot gas is adequately heated to melt frost build-up on evaporator surfaces, thereby enhancing efficiency and preventing ice accumulation that could restrict airflow or heat exchange. The selection of this specific pressure ensures that the system can deliver sufficient thermal energy while minimizing the risk of compressor damage or inefficiency caused by excessive pressure.

Setting the discharge pressure at this level allows for optimal operation of the heat exchanger coils during defrost cycles, which helps maintain consistent temperatures within the refrigeration system. Higher pressures may lead to undue stress on system components, while lower pressures may not provide enough heat for efficient defrosting, making 90 PSIG the standard benchmark for effective defrost hot gas regulation.