Refrigeration System Description

CCOT Refrigerant System:

CAUTION: Avoid breathing the A/C Refrigerant 134a (R-134a) and the lubricant vapor or the mist. Exposure may irritate the eyes, nose, and throat. Work in a well ventilated area. In order to remove R-134a from the A/C system, use service equipment that is certified to meet the requirements of SAE J 2210 (R-134a recycling equipment). If an accidental system discharge occurs, ventilate the work area before continuing service. Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

The Cycling Clutch Orifice Tube (CCOT) refrigerant system is designed in order to perform the following functions:
^ Cycle a compressor on and off in order to maintain desired cooling.
^ Prevent evaporator freeze-up.

The refrigeration cycle (on and off operation of the compressor) is controlled by the Powertrain Control Module (PCM) and by the A/C low temperature sensor. The low side temperature sensor senses low side system pressure as an indicator of evaporator temperature.