Question 14Refrigeration & AC - 1st Asst/Chief

The correct answer is C) Liquid line king valve. When charging a refrigeration system, the liquid line king valve is normally closed. This allows the refrigerant to flow into the high side of the system, increasing the pressure and charging the system. The other valves listed are not used for this purpose - the dehydrator inlet valve controls flow to the desiccant, the thermal expansion valve regulates refrigerant flow to the evaporator, and the suction line valve controls flow from the evaporator to the compressor. Closing the liquid line king valve is the proper procedure to charge the high side of the refrigeration system.