What is the suction header pressure for a medium temperature room coil?

The suction header pressure for a medium temperature room coil is typically around 20°F. In refrigeration systems, the suction header is where the refrigerant is drawn back from the evaporator coils. For medium temperature applications, which generally operate between 20°F to 32°F, a suction pressure of 20°F corresponds to a certain range of pressure in the refrigerant system that allows for efficient heat exchange and maintains the desired temperature within the space being cooled.

Maintaining the correct suction header pressure is critical for the effective operation of the refrigeration system; it ensures optimal performance and efficiency while avoiding issues like compressor overheating or liquid refrigerant return. The chosen temperature point balances the requirement for effective cooling with system reliability. In this case, 20°F is representative of suitable conditions for a medium temperature application, which can include environments like grocery store refrigeration.

Higher or lower suction pressures may lead to inefficient cooling, increased energy consumption, or operational issues, which reinforces why 20°F is an established norm for these applications in the industry.