Johnson Controls Chiller Technician Interview Questions and Answers

Sub cooling in chiller refers to the process of cooling the refrigerant below its saturation temperature to increase the efficiency of the chiller system.

• Sub cooling helps to ensure that the refrigerant remains in a liquid state throughout the chiller system.

• It involves removing additional heat from the refrigerant after it has already been condensed.

• Sub cooling can improve the overall performance and efficiency of the...read more

Superheat is the temperature of a vapor above its saturation temperature in a refrigeration system.

• Superheat is the difference between the actual temperature of the refrigerant vapor and its saturation temperature at a given pressure.

• It is important in refrigeration systems to prevent liquid refrigerant from entering the compressor, which can cause damage.

• Superheat is typically measured in degrees Fahrenheit or Celsius...read more

Superheat is the temperature increase of a vapor above its saturation temperature. The amount required varies depending on the system.

• Superheat is the temperature of a vapor above its boiling point at a given pressure

• It is necessary to prevent liquid refrigerant from entering the compressor

• The amount of superheat required depends on the type of refrigerant and the specific system

• Typically, superheat values range from 5