What Should Superheat Be at Compressor?

How much system superheat should I see at the compressor inlet? Compressor manufacturer's like to see a minimum of about 20 degrees of superheat at the compressor inlet. This is to assure them that no liquid refrigerant is entering the compressor.

What is a good target superheat?

The minimum recommended target superheat for most charts is between 4F to 5F for the environments with low indoor wet bulb and high outdoor dry bulb.

What is a normal value for evaporator superheat?

What is the correct superheat value of the refrigerant leaving an evaporator? It is based on the system's application and the manufacturer's design. As a rule of thumb, medium-temperature systems will generally have a superheat of 8° to 10° and low-temperature applications 4° to 6°.