What is the normal coil suction header pressure?

The normal coil suction header pressure in an industrial refrigeration system is often associated with specific temperatures in the context of refrigerant properties. The correct answer relates to the fact that the pressure within the suction header should correspond to a saturation temperature that allows the refrigeration system to operate efficiently and effectively.

In this context, a suction header pressure of 30°F reflects the appropriate temperature that aligns with the intended refrigerant used in the system, enabling proper heat absorption and minimizing the risk of evaporator icing. This temperature ensures that the refrigerant is in a vapor state as it leaves the evaporator, which is key for maintaining proper system performance and efficiency.

The choices presented offer different temperatures and a pressure measurement. It is essential to note that refrigeration systems typically operate within designated temperature ranges based on the chosen refrigerant, and these varying temperatures directly correlate with the pressures in the system, commonly measured in PSIG or °F. The ability to select and maintain the correct coil suction header pressure is crucial for optimal refrigeration cycle performance.